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A Study to Learn How Well a Single Dose of the Study Treatment Naproxen Sodium and Caffeine Combined in One Tablet (Fixed-dose Combination) Works to Relieve Pain After Dental Surgeries Compared to the Single Ingredients and to Placebo

A Randomized, Double-Blind, Single-Dose, Parallel, Placebo-Controlled Pivotal Trial to Confirm the Efficacy of a Fixed Dose Combination Tablet of Naproxen Sodium and Caffeine to Effectively Alleviate Postsurgical Dental Pain

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05485805
Enrollment
541
Registered
2022-08-03
Start date
2022-09-21
Completion date
2024-01-29
Last updated
2025-03-25

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Postoperative Dental Pain

Keywords

Dental pain

Brief summary

Researchers are looking for a better way to relieve pain in people, such as after dental surgery. Participants in this study, have had 3 or 4 third molars (cheek teeth) removed and subsequently have moderate to severe tooth pain. The study treatment naproxen sodium suppresses inflammatory pain by reducing inflammation. In the US, naproxen has been marketed since 1976, and naproxen sodium has been approved for over-the-counter (OTC) use since 1994 for the temporary relief of minor aches and pains. Caffeine, which is generally consumed as coffee, tea, or cocoa, has been shown to enhance the effect of various painkillers, and therefore is accepted as an additive. The main purpose of this study is to learn how well a fixed-dose combination of naproxen sodium and caffeine relieves pain compared to each single ingredient as well as to placebo in participants after molar removal. A placebo is a treatment that looks like a medicine but does not have any medicine in it. To answer this, the researchers will compare the amount of pain decrease over 8 hours in participants who received a single dose of either: * 1 fixed-dose tablet of naproxen sodium/caffeine * 2 fixed-dose tablets of naproxen sodium/caffeine * naproxen sodium only * caffeine only * or placebo The study participants will be randomly (by chance) assigned to one of the five treatment groups. They will take a single dose of two tablets by mouth within 4.5 hours after the surgery. If there is no pain relief within 2 hours after intake, other painkillers may be given.

Interventions

DRUGNaproxen sodium and caffeine (BAY2880376)

Tablet, oral use, single dose

Tablet, oral use, single dose

DRUGCaffeine

Tablet, oral use, single dose

DRUGPlacebo

Tablet, oral use, single dose

Sponsors

Bayer
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
16 Years to No maximum
Healthy volunteers
Yes

Inclusion criteria

* Healthy, ambulatory, male or female volunteers 16 years of age or older; * Body mass index (BMI) 18.5 to 35.0 kg/m\^2 inclusive as measured by the National Institutes of Health (NIH) BMI Calculator; * Participants will undergo surgical extraction of three or four third molars, two of which must be mandibular molars. Maxillary third molars may be removed regardless of impaction level. The mandibular extractions must have a trauma rating of mild or moderate and meet one of the following scenarios: two full bony impactions; two partial bony impactions; one full bony impaction in combination with one partial bony impaction. Supernumerary teeth present may also be removed at the discretion of the oral surgeon; * Have not taken any form of medication, nutritional supplements with analgesic properties (e.g. gamma-Aminobutyric acid \[GABA\], turmeric) or herbal supplements (i.e., St. John's Wort) within 5 days of admission (except for oral contraceptives, prophylactic antibiotics, multivitamin supplements, or other routine medications to treat benign conditions (such as antibiotics to treat acne), and agree not to take any medication (other than that provided to them) throughout the study; * Use of only short-acting local anesthetic (e.g., mepivacaine or lidocaine) preoperatively, with or without a vasoconstrictor and nitrous oxide at the discretion of the Investigator; * Have moderate to severe postoperative pain on the Categorical Pain Intensity Scale (a score of at least 2 on a 4 point scale) and a score of ≥ 5 on the 0-10 pain intensity Numerical Rating Scale (NRS) within 4.5 hours post-surgery.

Exclusion criteria

* History of hypersensitivity to naproxen sodium, caffeine, ibuprofen, nonsteroidal anti-inflammatory drug (NSAIDS), aspirin, similar pharmacological agents, local anesthetics, rescue medication or components of the investigational products; * Evidence or history of clinically significant (in the judgment of the investigator) hematological, renal, endocrine, pulmonary, gastrointestinal, cardiovascular (including hypertension and cardiac arrhythmia), hepatic, psychiatric, neurologic diseases, or malignancies within the last 5 years; * Participants with the following medical conditions may be eligible at the discretion of the investigator: attention deficit hyperactivity disorder (ADHD) on a stable dose regimen of methylphenidate/(dextro) amphetamine for at least 6 months; participants with hypothyroidism on a stable dose of synthetic thyroid hormone for at least 6 months; * Have received any form of treatment in the form of medication for depression in the past 6 months or any form of psychotropic agent (including selective serotonin uptake inhibitors \[SSRI\] but excluding ADHD medications described above) within the last 6 months; * Relevant concomitant disease such as asthma (exercise induced asthma is permitted); * Current or past history of gastrointestinal ulceration, gastrointestinal bleeding or other bleeding disorder(s); * Acute illness or active local infection prior to surgery that can interfere with the conduct of the study in the judgment of the investigator; * Use of any over-the-counter (OTC) or prescription medications with which the administration of naproxen, acetaminophen, ibuprofen, any other NSAID, (e.g., tramadol) or if a medication is contraindicated; * Use of any medications within 5 days of surgery until discharge from the study site (except oral contraceptives, prophylactic antibiotics, synthetic thyroid hormones, methylphenidate or medications to treat benign conditions such as antibiotics to treat acne); * Use of caffeine within 2 days prior to the study; * Habits of high consumption of caffeine (\>400 mg/day equivalent to about 3-4 cups of coffee per day); * Habituation to analgesic drugs including opioids (i.e., routine use of oral analgesics 5 or more times per week for greater than 3 weeks within the past 2 years); * Surgeon's trauma rating of severe following surgery.

Design outcomes

Primary

MeasureTime frameDescription
Sum of Pain Intensity Difference (SPID) Over 8 Hours Post-doseUp to 8 hours post-dosePain intensity scale is the Numerical Rating Scale measured from 0 to 10, where 0 indicates no pain and 10 means the wors pain imaginable. Pain intensity Difference (PID) is calculated by subtracting the pain intensity at different time points in the post-dose time point from the pain intensity at baseline. The summed pain intensity difference (SPID) is to be calculated by multiplying the PID score at each post dose time point by the duration (in hours) since the preceding time point and then summing the values over the relevant time period. For SPID (0-8), eight PIDs are summed up, which is minimally 0, if there is no pain relief or maximally 80, if there is very strong pain and significant pain relief.

Secondary

MeasureTime frameDescription
Total Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-doseup to 24 hours post-doseTotal Pain Relief (TOTPAR) is a cumulative measure that evaluates the overall pain relief over a specific time frame from 0-2,0-4,0-6,0-8,0-12 and 0-24 following drug administration. It is calculated by multiplying the pain relief score from the categorical pain relief scale at each time post-dose time by multiplying the duration (in hours) since the preceding time point and then adding these values. Categorical Pain Relief Scale measure the degree of pain relief using a scale from 0 to 4, in which 0 is no relief, 1 a little relief, 2 some relief, 3 a lot of relief and 4 complete relief. Higher values of TOTPAR indicates better pain relief and suggest that the investigational product provided consistence and meaningful pain relief over the period. Low TOTPAR values indicates minimal pain relief or short-lasting efficacy.
Time to First Use of Rescue MedicationUp to 24 hours post-dose
The Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour PeriodUp to 24 hours post-dose
Time to First Perceptible Relief Measured by a StopwatchUp to 24 hours post-dose
Time to Meaningful Relief Measured by a StopwatchUp to 24 hours post-dosemeaningful relief is the point when the participant perceives their pain as significant and meaningful to them using the double-stopwatched method that allows to differentiate between the onset of the analgesic effect (first perceptible pain relief) and the onset of meaningful pain relief
Time to First Perceptible Relief Confirmed by Meaningful Relief Defined as the Time to Perceptible Pain ReliefUp to 24 hours post-dose
Pain Intensity Difference (PID)up to 24 hours post-dosePain Intensity Difference (PID) is the change of pain intensity at a specific time point compared to baseline using the Numerical Rating Scale from 0 to 10. Value of 0 score means no pain and 10 score result means the worst possible pain. For each post-dose time point, pain intensity differences will be derived by subtracting the pain intensity at the post-dose time point from the baseline intensity score. Positive PID values indicate pain relief (reduction in pain intensity), while negative or small PID values suggest little or no reduction in pain intensity
Sum of Pain Intensity Differences From 0 to 2, 4, 6, 12 and 24 Hours Post-dosefrom 0 to 2, 4, 6, 12 and 24 hours post-dosePain intensity scale is the Numerical Rating Scale measured from 0 to 10, where 0 indicates no pain and 10 means the wors pain imaginable. Pain intensity Difference (PID) is calculated by subtracting the pain intensity at different time points in the post-dose time point from the pain intensity at baseline. The summed pain intensity difference (SPID) is to be calculated by multiplying the PID score at each post dose time point by the duration (in hours) since the preceding time point and then summing the values over the relevant time period. For SPID(0-i), i PIDs are summed up, which minimally is 0, if there is no pain relief or maximally i\*10, if there is very strong pain and significant pain relief.
Peak Pain Intensity Difference (PID)Up to 24 hours post-doseThe Peak Pain Intensity (peak PID) refers to the maximum change in pain intensity from baseline observed at any post-dose time point using the Numerical Rating Scale from 0 to 10. Value of 0 score means no pain and 10 score result means the worst possible pain. Participants record their pain intensity assessment in the time frame points and the highest value is identified as the Peak Pain Intensity. A high peak pain intensuty (higher value on NRS) indicates severe pain and a less effective analgesic response, and a lower value signifies better pain control and a more effective response.
Number of Participants With Certain Peak Pain Relief ScoreUp to 24 hours post-doseNumber of participants with pain relief score 4, 3, 2, 1. The Peak Pain Relief Score refers to the highest level of pain relief a participant reported at any time point during the study period. It provides an overview of the maximum effectiveness of the treatment at any given point during the observation period using the Categorical Pain Relief Scale which measure the degree of pain relief using a scale from 0 to 4, in which 0 is no relief, 1 a little relief, 2 some relief, 3 a lot of relief and 4 complete relief. A high socre closer indicates significant pain relief and reflects the effectiveness of the analgesic treatment. A score closer to 0 indicates little to no pain relief and suggests limited treatment efficacy.
Cumulative Percent of Participants With 'at Least a 2-point PID' Over TimeUp to 24 hours post-dose
Global Assessment of Pain Relief of the Investigational Product24 hours post-doseNumber of participants with overall rating poor, fair, good, very good, excellent 24 hour post-dose
Number of Participants With Adverse EventsUp to 5 days post-doseNumber of participants with at least one treatment emergent adverse event
Number of Participants With Significant Changes in Vital Signs Since BaselineUp to 5 days post-dose
Pain Relief ScoreUp to 24 hours post-dosePain Relief Score (PRS): 0 = No Relief; 1 = A Little Relief; 2 = Some Relief; 3 = A Lot of Relief; 4 = Complete Relief.

Countries

United States

Participant flow

Recruitment details

The clinical study was conducted at a single study site in the United States between 21 September 2022 (first participant first visit) and 29 January 2024 (last participant last visit).

Pre-assignment details

A total of 750 participants were screened at a single study center in the United States. 541 participants were randomly assigned to study intervention.

Participants by arm

ArmCount
Naproxen Sodium/ Caffeine 220/65 mg
Participants received one tablet of the fixed dose combination Naproxen sodium/Caffeine 220/65 mg and one tablet of placebo.
147
Naproxen Sodium/Caffeine 2x220/65 mg
Participants received two tablets of the fixed dose combination Naproxen sodium/Caffeine 220/65 mg.
148
Naproxen Sodium 220 mg
Participants received one tablet of Naproxen sodium 220 mg and one tablet of placebo.
147
Caffeine 100 mg
Participants received one tablet Caffeine 100 mg one tablet of placebo.
50
Placebo
Participants received two tablets of placebo.
49
Total541

Withdrawals & dropouts

PeriodReasonFG000FG001FG002FG003FG004
Overall StudyAdverse Event01000
Overall StudyLost to Follow-up11310
Overall StudyWithdrawal by Subject12202

Baseline characteristics

CharacteristicNaproxen Sodium/ Caffeine 220/65 mgTotalPlaceboCaffeine 100 mgNaproxen Sodium 220 mgNaproxen Sodium/Caffeine 2x220/65 mg
Age, Continuous18.3 years
STANDARD_DEVIATION 2.13
18.1 years
STANDARD_DEVIATION 1.98
17.9 years
STANDARD_DEVIATION 2.05
17.7 years
STANDARD_DEVIATION 1.82
18.1 years
STANDARD_DEVIATION 1.84
18.1 years
STANDARD_DEVIATION 1.99
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants2 Participants0 Participants0 Participants0 Participants2 Participants
Race (NIH/OMB)
Asian
2 Participants11 Participants2 Participants2 Participants4 Participants1 Participants
Race (NIH/OMB)
Black or African American
2 Participants4 Participants0 Participants1 Participants1 Participants0 Participants
Race (NIH/OMB)
More than one race
2 Participants6 Participants0 Participants1 Participants1 Participants2 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
1 Participants9 Participants0 Participants1 Participants5 Participants2 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants4 Participants1 Participants0 Participants1 Participants2 Participants
Race (NIH/OMB)
White
140 Participants505 Participants46 Participants45 Participants135 Participants139 Participants
Sex: Female, Male
Female
61 Participants243 Participants23 Participants22 Participants67 Participants70 Participants
Sex: Female, Male
Male
86 Participants298 Participants26 Participants28 Participants80 Participants78 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
EG004
affected / at risk
deaths
Total, all-cause mortality
0 / 1470 / 1480 / 490 / 500 / 147
other
Total, other adverse events
19 / 14711 / 1484 / 493 / 5023 / 147
serious
Total, serious adverse events
0 / 1470 / 1480 / 490 / 500 / 147

Outcome results

Primary

Sum of Pain Intensity Difference (SPID) Over 8 Hours Post-dose

Pain intensity scale is the Numerical Rating Scale measured from 0 to 10, where 0 indicates no pain and 10 means the wors pain imaginable. Pain intensity Difference (PID) is calculated by subtracting the pain intensity at different time points in the post-dose time point from the pain intensity at baseline. The summed pain intensity difference (SPID) is to be calculated by multiplying the PID score at each post dose time point by the duration (in hours) since the preceding time point and then summing the values over the relevant time period. For SPID (0-8), eight PIDs are summed up, which is minimally 0, if there is no pain relief or maximally 80, if there is very strong pain and significant pain relief.

Time frame: Up to 8 hours post-dose

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
Naproxen Sodium/ Caffeine 220/65 mgSum of Pain Intensity Difference (SPID) Over 8 Hours Post-dose31.293 Points on scaleStandard Error 1.441
Naproxen Sodium/Caffeine 2x220/65 mgSum of Pain Intensity Difference (SPID) Over 8 Hours Post-dose37.242 Points on scaleStandard Error 1.436
Naproxen Sodium 220 mgSum of Pain Intensity Difference (SPID) Over 8 Hours Post-dose31.082 Points on scaleStandard Error 1.443
Caffeine 100 mgSum of Pain Intensity Difference (SPID) Over 8 Hours Post-dose5.146 Points on scaleStandard Error 2.47
PlaceboSum of Pain Intensity Difference (SPID) Over 8 Hours Post-dose8.622 Points on scaleStandard Error 2.521
p-value: =0.00495% CI: [-9.946, -1.954]ANCOVA
p-value: =0.00395% CI: [2.161, 10.161]ANCOVA
p-value: <0.00195% CI: [20.317, 31.556]ANCOVA
p-value: =0.32595% CI: [-10.41, 3.457]ANCOVA
p-value: =0.91895% CI: [-3.798, 4.22]ANCOVA
p-value: <0.00195% CI: [26.484, 37.71]ANCOVA
p-value: <0.00195% CI: [16.753, 28.166]ANCOVA
p-value: <0.00195% CI: [20.529, 31.765]ANCOVA
p-value: <0.00195% CI: [22.921, 34.32]ANCOVA
p-value: <0.00195% CI: [16.966, 28.375]ANCOVA
Secondary

Cumulative Percent of Participants With 'at Least a 2-point PID' Over Time

Time frame: Up to 24 hours post-dose

ArmMeasureGroupValue (NUMBER)
Naproxen Sodium/ Caffeine 220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 11 hours99.3 percentage
Naproxen Sodium/ Caffeine 220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 10 hours99.3 percentage
Naproxen Sodium/ Caffeine 220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 8 hours99.3 percentage
Naproxen Sodium/ Caffeine 220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 24 hours100 percentage
Naproxen Sodium/ Caffeine 220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 9 hours99.3 percentage
Naproxen Sodium/ Caffeine 220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 1.5 hour87.1 percentage
Naproxen Sodium/ Caffeine 220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Time0.5 hour post-dose50.3 percentage
Naproxen Sodium/ Caffeine 220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 22 hours100 percentage
Naproxen Sodium/ Caffeine 220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 2 hours92.5 percentage
Naproxen Sodium/ Caffeine 220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 20 hours100 percentage
Naproxen Sodium/ Caffeine 220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 3 hours98.0 percentage
Naproxen Sodium/ Caffeine 220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 12 hours100 percentage
Naproxen Sodium/ Caffeine 220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 18 hours100 percentage
Naproxen Sodium/ Caffeine 220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 4 hours98.6 percentage
Naproxen Sodium/ Caffeine 220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 1 hour78.2 percentage
Naproxen Sodium/ Caffeine 220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 16 hours100 percentage
Naproxen Sodium/ Caffeine 220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 5 hours98.6 percentage
Naproxen Sodium/ Caffeine 220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 14 hours100 percentage
Naproxen Sodium/ Caffeine 220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 6 hours99.3 percentage
Naproxen Sodium/ Caffeine 220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 7 hours99.3 percentage
Naproxen Sodium/Caffeine 2x220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 6 hours99.3 percentage
Naproxen Sodium/Caffeine 2x220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 7 hours99.3 percentage
Naproxen Sodium/Caffeine 2x220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 24 hours99.3 percentage
Naproxen Sodium/Caffeine 2x220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 10 hours99.3 percentage
Naproxen Sodium/Caffeine 2x220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 3 hours99.3 percentage
Naproxen Sodium/Caffeine 2x220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 5 hours99.3 percentage
Naproxen Sodium/Caffeine 2x220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 8 hours99.3 percentage
Naproxen Sodium/Caffeine 2x220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 18 hours99.3 percentage
Naproxen Sodium/Caffeine 2x220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 9 hours99.3 percentage
Naproxen Sodium/Caffeine 2x220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 1 hour86.5 percentage
Naproxen Sodium/Caffeine 2x220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 14 hours99.3 percentage
Naproxen Sodium/Caffeine 2x220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 1.5 hour94.6 percentage
Naproxen Sodium/Caffeine 2x220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 4 hours99.3 percentage
Naproxen Sodium/Caffeine 2x220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 22 hours99.3 percentage
Naproxen Sodium/Caffeine 2x220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Time0.5 hour post-dose62.8 percentage
Naproxen Sodium/Caffeine 2x220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 16 hours99.3 percentage
Naproxen Sodium/Caffeine 2x220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 2 hours98.0 percentage
Naproxen Sodium/Caffeine 2x220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 12 hours99.3 percentage
Naproxen Sodium/Caffeine 2x220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 20 hours99.3 percentage
Naproxen Sodium/Caffeine 2x220/65 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 11 hours99.3 percentage
Naproxen Sodium 220 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 1.5 hour92.5 percentage
Naproxen Sodium 220 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Time0.5 hour post-dose60.5 percentage
Naproxen Sodium 220 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 1 hour86.4 percentage
Naproxen Sodium 220 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 2 hours94.6 percentage
Naproxen Sodium 220 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 3 hours98.0 percentage
Naproxen Sodium 220 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 4 hours99.3 percentage
Naproxen Sodium 220 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 5 hours99.3 percentage
Naproxen Sodium 220 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 6 hours99.3 percentage
Naproxen Sodium 220 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 7 hours99.3 percentage
Naproxen Sodium 220 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 8 hours100 percentage
Naproxen Sodium 220 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 9 hours100 percentage
Naproxen Sodium 220 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 10 hours100 percentage
Naproxen Sodium 220 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 11 hours100 percentage
Naproxen Sodium 220 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 14 hours100 percentage
Naproxen Sodium 220 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 16 hours100 percentage
Naproxen Sodium 220 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 18 hours100 percentage
Naproxen Sodium 220 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 20 hours100 percentage
Naproxen Sodium 220 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 22 hours100 percentage
Naproxen Sodium 220 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 24 hours100 percentage
Naproxen Sodium 220 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 12 hours100 percentage
Caffeine 100 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 18 hours100 percentage
Caffeine 100 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 14 hours100 percentage
Caffeine 100 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 12 hours100 percentage
Caffeine 100 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 2 hours64.0 percentage
Caffeine 100 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 11 hours100 percentage
Caffeine 100 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 20 hours100 percentage
Caffeine 100 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 4 hours94.0 percentage
Caffeine 100 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 6 hours100 percentage
Caffeine 100 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 1.5 hour46.0 percentage
Caffeine 100 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Time0.5 hour post-dose32.0 percentage
Caffeine 100 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 16 hours100 percentage
Caffeine 100 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 8 hours100 percentage
Caffeine 100 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 22 hours100 percentage
Caffeine 100 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 9 hours100 percentage
Caffeine 100 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 5 hours98.0 percentage
Caffeine 100 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 1 hour40.0 percentage
Caffeine 100 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 7 hours100 percentage
Caffeine 100 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 3 hours86.0 percentage
Caffeine 100 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 10 hours100 percentage
Caffeine 100 mgCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 24 hours100 percentage
PlaceboCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 10 hours98.0 percentage
PlaceboCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 1 hour26.5 percentage
PlaceboCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 11 hours98.0 percentage
PlaceboCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 12 hours98.0 percentage
PlaceboCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 5 hours98.0 percentage
PlaceboCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 14 hours98.0 percentage
PlaceboCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 4 hours95.9 percentage
PlaceboCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 24 hours98.0 percentage
PlaceboCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 16 hours98.0 percentage
PlaceboCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 3 hours87.8 percentage
PlaceboCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 18 hours98.0 percentage
PlaceboCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 2 hours71.4 percentage
PlaceboCumulative Percent of Participants With 'at Least a 2-point PID' Over Time0.5 hour post-dose18.4 percentage
PlaceboCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 20 hours98.0 percentage
PlaceboCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 1.5 hour40.8 percentage
PlaceboCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 8 hours98.0 percentage
PlaceboCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 9 hours98.0 percentage
PlaceboCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 7 hours98.0 percentage
PlaceboCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 22 hours98.0 percentage
PlaceboCumulative Percent of Participants With 'at Least a 2-point PID' Over Timeless or equal 6 hours98.0 percentage
Secondary

Global Assessment of Pain Relief of the Investigational Product

Number of participants with overall rating poor, fair, good, very good, excellent 24 hour post-dose

Time frame: 24 hours post-dose

ArmMeasureCategoryValue (COUNT_OF_PARTICIPANTS)
Naproxen Sodium/ Caffeine 220/65 mgGlobal Assessment of Pain Relief of the Investigational Productvery good56 Participants
Naproxen Sodium/ Caffeine 220/65 mgGlobal Assessment of Pain Relief of the Investigational Productpoor16 Participants
Naproxen Sodium/ Caffeine 220/65 mgGlobal Assessment of Pain Relief of the Investigational Productexcellent30 Participants
Naproxen Sodium/ Caffeine 220/65 mgGlobal Assessment of Pain Relief of the Investigational Productfair10 Participants
Naproxen Sodium/ Caffeine 220/65 mgGlobal Assessment of Pain Relief of the Investigational Productgood35 Participants
Naproxen Sodium/Caffeine 2x220/65 mgGlobal Assessment of Pain Relief of the Investigational Productvery good69 Participants
Naproxen Sodium/Caffeine 2x220/65 mgGlobal Assessment of Pain Relief of the Investigational Productgood23 Participants
Naproxen Sodium/Caffeine 2x220/65 mgGlobal Assessment of Pain Relief of the Investigational Productfair12 Participants
Naproxen Sodium/Caffeine 2x220/65 mgGlobal Assessment of Pain Relief of the Investigational Productexcellent37 Participants
Naproxen Sodium/Caffeine 2x220/65 mgGlobal Assessment of Pain Relief of the Investigational Productpoor5 Participants
Naproxen Sodium 220 mgGlobal Assessment of Pain Relief of the Investigational Productgood38 Participants
Naproxen Sodium 220 mgGlobal Assessment of Pain Relief of the Investigational Productpoor11 Participants
Naproxen Sodium 220 mgGlobal Assessment of Pain Relief of the Investigational Productfair12 Participants
Naproxen Sodium 220 mgGlobal Assessment of Pain Relief of the Investigational Productvery good58 Participants
Naproxen Sodium 220 mgGlobal Assessment of Pain Relief of the Investigational Productexcellent28 Participants
Caffeine 100 mgGlobal Assessment of Pain Relief of the Investigational Productvery good5 Participants
Caffeine 100 mgGlobal Assessment of Pain Relief of the Investigational Productpoor26 Participants
Caffeine 100 mgGlobal Assessment of Pain Relief of the Investigational Productexcellent1 Participants
Caffeine 100 mgGlobal Assessment of Pain Relief of the Investigational Productgood8 Participants
Caffeine 100 mgGlobal Assessment of Pain Relief of the Investigational Productfair10 Participants
PlaceboGlobal Assessment of Pain Relief of the Investigational Productfair5 Participants
PlaceboGlobal Assessment of Pain Relief of the Investigational Productexcellent3 Participants
PlaceboGlobal Assessment of Pain Relief of the Investigational Productvery good9 Participants
PlaceboGlobal Assessment of Pain Relief of the Investigational Productpoor27 Participants
PlaceboGlobal Assessment of Pain Relief of the Investigational Productgood3 Participants
Secondary

Number of Participants With Adverse Events

Number of participants with at least one treatment emergent adverse event

Time frame: Up to 5 days post-dose

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Naproxen Sodium/ Caffeine 220/65 mgNumber of Participants With Adverse Events19 Participants
Naproxen Sodium/Caffeine 2x220/65 mgNumber of Participants With Adverse Events11 Participants
Naproxen Sodium 220 mgNumber of Participants With Adverse Events23 Participants
Caffeine 100 mgNumber of Participants With Adverse Events3 Participants
PlaceboNumber of Participants With Adverse Events4 Participants
Secondary

Number of Participants With Certain Peak Pain Relief Score

Number of participants with pain relief score 4, 3, 2, 1. The Peak Pain Relief Score refers to the highest level of pain relief a participant reported at any time point during the study period. It provides an overview of the maximum effectiveness of the treatment at any given point during the observation period using the Categorical Pain Relief Scale which measure the degree of pain relief using a scale from 0 to 4, in which 0 is no relief, 1 a little relief, 2 some relief, 3 a lot of relief and 4 complete relief. A high socre closer indicates significant pain relief and reflects the effectiveness of the analgesic treatment. A score closer to 0 indicates little to no pain relief and suggests limited treatment efficacy.

Time frame: Up to 24 hours post-dose

ArmMeasureCategoryValue (COUNT_OF_PARTICIPANTS)
Naproxen Sodium/ Caffeine 220/65 mgNumber of Participants With Certain Peak Pain Relief ScorePain relief score 3101 Participants
Naproxen Sodium/ Caffeine 220/65 mgNumber of Participants With Certain Peak Pain Relief ScorePain relief score 11 Participants
Naproxen Sodium/ Caffeine 220/65 mgNumber of Participants With Certain Peak Pain Relief ScorePain relief score 431 Participants
Naproxen Sodium/ Caffeine 220/65 mgNumber of Participants With Certain Peak Pain Relief ScorePain relief score 214 Participants
Naproxen Sodium/Caffeine 2x220/65 mgNumber of Participants With Certain Peak Pain Relief ScorePain relief score 447 Participants
Naproxen Sodium/Caffeine 2x220/65 mgNumber of Participants With Certain Peak Pain Relief ScorePain relief score 385 Participants
Naproxen Sodium/Caffeine 2x220/65 mgNumber of Participants With Certain Peak Pain Relief ScorePain relief score 11 Participants
Naproxen Sodium/Caffeine 2x220/65 mgNumber of Participants With Certain Peak Pain Relief ScorePain relief score 215 Participants
Naproxen Sodium 220 mgNumber of Participants With Certain Peak Pain Relief ScorePain relief score 10 Participants
Naproxen Sodium 220 mgNumber of Participants With Certain Peak Pain Relief ScorePain relief score 436 Participants
Naproxen Sodium 220 mgNumber of Participants With Certain Peak Pain Relief ScorePain relief score 3102 Participants
Naproxen Sodium 220 mgNumber of Participants With Certain Peak Pain Relief ScorePain relief score 29 Participants
Caffeine 100 mgNumber of Participants With Certain Peak Pain Relief ScorePain relief score 415 Participants
Caffeine 100 mgNumber of Participants With Certain Peak Pain Relief ScorePain relief score 10 Participants
Caffeine 100 mgNumber of Participants With Certain Peak Pain Relief ScorePain relief score 24 Participants
Caffeine 100 mgNumber of Participants With Certain Peak Pain Relief ScorePain relief score 331 Participants
PlaceboNumber of Participants With Certain Peak Pain Relief ScorePain relief score 25 Participants
PlaceboNumber of Participants With Certain Peak Pain Relief ScorePain relief score 415 Participants
PlaceboNumber of Participants With Certain Peak Pain Relief ScorePain relief score 329 Participants
PlaceboNumber of Participants With Certain Peak Pain Relief ScorePain relief score 10 Participants
Secondary

Number of Participants With Significant Changes in Vital Signs Since Baseline

Time frame: Up to 5 days post-dose

ArmMeasureGroupValue (NUMBER)
Naproxen Sodium/ Caffeine 220/65 mgNumber of Participants With Significant Changes in Vital Signs Since BaselineHypertension2 Participants
Naproxen Sodium/ Caffeine 220/65 mgNumber of Participants With Significant Changes in Vital Signs Since BaselineBradycardia1 Participants
Naproxen Sodium/ Caffeine 220/65 mgNumber of Participants With Significant Changes in Vital Signs Since BaselineTachycardia1 Participants
Naproxen Sodium/ Caffeine 220/65 mgNumber of Participants With Significant Changes in Vital Signs Since BaselineHypotension1 Participants
Naproxen Sodium/Caffeine 2x220/65 mgNumber of Participants With Significant Changes in Vital Signs Since BaselineTachycardia0 Participants
Naproxen Sodium/Caffeine 2x220/65 mgNumber of Participants With Significant Changes in Vital Signs Since BaselineBradycardia1 Participants
Naproxen Sodium/Caffeine 2x220/65 mgNumber of Participants With Significant Changes in Vital Signs Since BaselineHypertension0 Participants
Naproxen Sodium/Caffeine 2x220/65 mgNumber of Participants With Significant Changes in Vital Signs Since BaselineHypotension3 Participants
Naproxen Sodium 220 mgNumber of Participants With Significant Changes in Vital Signs Since BaselineBradycardia0 Participants
Naproxen Sodium 220 mgNumber of Participants With Significant Changes in Vital Signs Since BaselineHypotension4 Participants
Naproxen Sodium 220 mgNumber of Participants With Significant Changes in Vital Signs Since BaselineTachycardia3 Participants
Naproxen Sodium 220 mgNumber of Participants With Significant Changes in Vital Signs Since BaselineHypertension0 Participants
Caffeine 100 mgNumber of Participants With Significant Changes in Vital Signs Since BaselineBradycardia0 Participants
Caffeine 100 mgNumber of Participants With Significant Changes in Vital Signs Since BaselineHypotension0 Participants
Caffeine 100 mgNumber of Participants With Significant Changes in Vital Signs Since BaselineHypertension0 Participants
Caffeine 100 mgNumber of Participants With Significant Changes in Vital Signs Since BaselineTachycardia0 Participants
PlaceboNumber of Participants With Significant Changes in Vital Signs Since BaselineTachycardia0 Participants
PlaceboNumber of Participants With Significant Changes in Vital Signs Since BaselineBradycardia0 Participants
PlaceboNumber of Participants With Significant Changes in Vital Signs Since BaselineHypotension0 Participants
PlaceboNumber of Participants With Significant Changes in Vital Signs Since BaselineHypertension0 Participants
Secondary

Pain Intensity Difference (PID)

Pain Intensity Difference (PID) is the change of pain intensity at a specific time point compared to baseline using the Numerical Rating Scale from 0 to 10. Value of 0 score means no pain and 10 score result means the worst possible pain. For each post-dose time point, pain intensity differences will be derived by subtracting the pain intensity at the post-dose time point from the baseline intensity score. Positive PID values indicate pain relief (reduction in pain intensity), while negative or small PID values suggest little or no reduction in pain intensity

Time frame: up to 24 hours post-dose

ArmMeasureGroupValue (MEAN)Dispersion
Naproxen Sodium/ Caffeine 220/65 mgPain Intensity Difference (PID)11 hours post-dose3.1 Points on scaleStandard Deviation 2.84
Naproxen Sodium/ Caffeine 220/65 mgPain Intensity Difference (PID)6 hours post-dose3.9 Points on scaleStandard Deviation 2.6
Naproxen Sodium/ Caffeine 220/65 mgPain Intensity Difference (PID)0.5 hours post-dose1.8 Points on scaleStandard Deviation 1.89
Naproxen Sodium/ Caffeine 220/65 mgPain Intensity Difference (PID)12 hours post-dose2.9 Points on scaleStandard Deviation 2.9
Naproxen Sodium/ Caffeine 220/65 mgPain Intensity Difference (PID)3 hours post-dose4.3 Points on scaleStandard Deviation 2.55
Naproxen Sodium/ Caffeine 220/65 mgPain Intensity Difference (PID)22 hours post-dose2.8 Points on scaleStandard Deviation 3.19
Naproxen Sodium/ Caffeine 220/65 mgPain Intensity Difference (PID)10 hours post-dose3.3 Points on scaleStandard Deviation 2.78
Naproxen Sodium/ Caffeine 220/65 mgPain Intensity Difference (PID)5 hours post-dose4.0 Points on scaleStandard Deviation 2.55
Naproxen Sodium/ Caffeine 220/65 mgPain Intensity Difference (PID)9 hours post dose3.5 Points on scaleStandard Deviation 2.72
Naproxen Sodium/ Caffeine 220/65 mgPain Intensity Difference (PID)4 hours post-dose4.2 Points on scaleStandard Deviation 2.54
Naproxen Sodium/ Caffeine 220/65 mgPain Intensity Difference (PID)1.5 hours post-dose4.0 Points on scaleStandard Deviation 2.4
Naproxen Sodium/ Caffeine 220/65 mgPain Intensity Difference (PID)16 hours post-dose2.6 Points on scaleStandard Deviation 2.99
Naproxen Sodium/ Caffeine 220/65 mgPain Intensity Difference (PID)14 hours post-dose2.9 Points on scaleStandard Deviation 2.97
Naproxen Sodium/ Caffeine 220/65 mgPain Intensity Difference (PID)18 hours post-dose2.7 Points on scaleStandard Deviation 3.05
Naproxen Sodium/ Caffeine 220/65 mgPain Intensity Difference (PID)8 hours post-dose3.6 Points on scaleStandard Deviation 2.63
Naproxen Sodium/ Caffeine 220/65 mgPain Intensity Difference (PID)Baseline7.6 Points on scaleStandard Deviation 1.22
Naproxen Sodium/ Caffeine 220/65 mgPain Intensity Difference (PID)24 hours post-dose2.9 Points on scaleStandard Deviation 3.19
Naproxen Sodium/ Caffeine 220/65 mgPain Intensity Difference (PID)1 hour post-dose3.4 Points on scaleStandard Deviation 2.4
Naproxen Sodium/ Caffeine 220/65 mgPain Intensity Difference (PID)7 hours post-dose3.8 Points on scaleStandard Deviation 2.61
Naproxen Sodium/ Caffeine 220/65 mgPain Intensity Difference (PID)20 hours post-dose2.7 Points on scaleStandard Deviation 3.07
Naproxen Sodium/ Caffeine 220/65 mgPain Intensity Difference (PID)2 hours post-dose4.4 Points on scaleStandard Deviation 2.56
Naproxen Sodium/Caffeine 2x220/65 mgPain Intensity Difference (PID)22 hours post-dose2.7 Points on scaleStandard Deviation 2.85
Naproxen Sodium/Caffeine 2x220/65 mgPain Intensity Difference (PID)11 hours post-dose3.6 Points on scaleStandard Deviation 2.86
Naproxen Sodium/Caffeine 2x220/65 mgPain Intensity Difference (PID)16 hours post-dose2.7 Points on scaleStandard Deviation 2.85
Naproxen Sodium/Caffeine 2x220/65 mgPain Intensity Difference (PID)12 hours post-dose3.2 Points on scaleStandard Deviation 2.9
Naproxen Sodium/Caffeine 2x220/65 mgPain Intensity Difference (PID)14 hours post-dose2.9 Points on scaleStandard Deviation 3.01
Naproxen Sodium/Caffeine 2x220/65 mgPain Intensity Difference (PID)1.5 hours post-dose4.9 Points on scaleStandard Deviation 2.13
Naproxen Sodium/Caffeine 2x220/65 mgPain Intensity Difference (PID)2 hours post-dose5.2 Points on scaleStandard Deviation 2.12
Naproxen Sodium/Caffeine 2x220/65 mgPain Intensity Difference (PID)Baseline7.6 Points on scaleStandard Deviation 1.2
Naproxen Sodium/Caffeine 2x220/65 mgPain Intensity Difference (PID)3 hours post-dose5.2 Points on scaleStandard Deviation 2.28
Naproxen Sodium/Caffeine 2x220/65 mgPain Intensity Difference (PID)0.5 hours post-dose2.3 Points on scaleStandard Deviation 1.91
Naproxen Sodium/Caffeine 2x220/65 mgPain Intensity Difference (PID)4 hours post-dose5.1 Points on scaleStandard Deviation 2.47
Naproxen Sodium/Caffeine 2x220/65 mgPain Intensity Difference (PID)5 hours post-dose4.8 Points on scaleStandard Deviation 2.46
Naproxen Sodium/Caffeine 2x220/65 mgPain Intensity Difference (PID)20 hours post-dose2.6 Points on scaleStandard Deviation 2.81
Naproxen Sodium/Caffeine 2x220/65 mgPain Intensity Difference (PID)6 hours post-dose4.6 Points on scaleStandard Deviation 2.48
Naproxen Sodium/Caffeine 2x220/65 mgPain Intensity Difference (PID)24 hours post-dose2.8 Points on scaleStandard Deviation 2.92
Naproxen Sodium/Caffeine 2x220/65 mgPain Intensity Difference (PID)7 hours post-dose4.4 Points on scaleStandard Deviation 2.56
Naproxen Sodium/Caffeine 2x220/65 mgPain Intensity Difference (PID)8 hours post-dose4.1 Points on scaleStandard Deviation 2.6
Naproxen Sodium/Caffeine 2x220/65 mgPain Intensity Difference (PID)1 hour post-dose4.3 Points on scaleStandard Deviation 2.18
Naproxen Sodium/Caffeine 2x220/65 mgPain Intensity Difference (PID)18 hours post-dose2.6 Points on scaleStandard Deviation 2.83
Naproxen Sodium/Caffeine 2x220/65 mgPain Intensity Difference (PID)9 hours post dose3.9 Points on scaleStandard Deviation 2.68
Naproxen Sodium/Caffeine 2x220/65 mgPain Intensity Difference (PID)10 hours post-dose3.8 Points on scaleStandard Deviation 2.81
Naproxen Sodium 220 mgPain Intensity Difference (PID)6 hours post-dose3.8 Points on scaleStandard Deviation 2.74
Naproxen Sodium 220 mgPain Intensity Difference (PID)10 hours post-dose3.1 Points on scaleStandard Deviation 3.03
Naproxen Sodium 220 mgPain Intensity Difference (PID)22 hours post-dose2.6 Points on scaleStandard Deviation 3.14
Naproxen Sodium 220 mgPain Intensity Difference (PID)24 hours post-dose2.6 Points on scaleStandard Deviation 3.2
Naproxen Sodium 220 mgPain Intensity Difference (PID)9 hours post dose3.3 Points on scaleStandard Deviation 2.96
Naproxen Sodium 220 mgPain Intensity Difference (PID)7 hours post-dose3.5 Points on scaleStandard Deviation 2.8
Naproxen Sodium 220 mgPain Intensity Difference (PID)1.5 hours post-dose4.3 Points on scaleStandard Deviation 2.27
Naproxen Sodium 220 mgPain Intensity Difference (PID)18 hours post-dose2.4 Points on scaleStandard Deviation 3.02
Naproxen Sodium 220 mgPain Intensity Difference (PID)14 hours post-dose2.6 Points on scaleStandard Deviation 3.04
Naproxen Sodium 220 mgPain Intensity Difference (PID)1 hour post-dose3.7 Points on scaleStandard Deviation 2.23
Naproxen Sodium 220 mgPain Intensity Difference (PID)8 hours post-dose3.3 Points on scaleStandard Deviation 2.88
Naproxen Sodium 220 mgPain Intensity Difference (PID)4 hours post-dose4.3 Points on scaleStandard Deviation 2.65
Naproxen Sodium 220 mgPain Intensity Difference (PID)0.5 hours post-dose2.4 Points on scaleStandard Deviation 1.98
Naproxen Sodium 220 mgPain Intensity Difference (PID)20 hours post-dose2.5 Points on scaleStandard Deviation 3.06
Naproxen Sodium 220 mgPain Intensity Difference (PID)3 hours post-dose4.4 Points on scaleStandard Deviation 2.45
Naproxen Sodium 220 mgPain Intensity Difference (PID)11 hours post-dose2.9 Points on scaleStandard Deviation 3.02
Naproxen Sodium 220 mgPain Intensity Difference (PID)5 hours post-dose4.1 Points on scaleStandard Deviation 2.73
Naproxen Sodium 220 mgPain Intensity Difference (PID)Baseline7.8 Points on scaleStandard Deviation 1.21
Naproxen Sodium 220 mgPain Intensity Difference (PID)16 hours post-dose2.4 Points on scaleStandard Deviation 3.04
Naproxen Sodium 220 mgPain Intensity Difference (PID)2 hours post-dose4.7 Points on scaleStandard Deviation 2.3
Naproxen Sodium 220 mgPain Intensity Difference (PID)12 hours post-dose2.8 Points on scaleStandard Deviation 3.07
Caffeine 100 mgPain Intensity Difference (PID)14 hours post-dose0.4 Points on scaleStandard Deviation 2.2
Caffeine 100 mgPain Intensity Difference (PID)Baseline7.7 Points on scaleStandard Deviation 1.39
Caffeine 100 mgPain Intensity Difference (PID)0.5 hours post-dose1.0 Points on scaleStandard Deviation 1.38
Caffeine 100 mgPain Intensity Difference (PID)1 hour post-dose0.8 Points on scaleStandard Deviation 1.67
Caffeine 100 mgPain Intensity Difference (PID)1.5 hours post-dose0.6 Points on scaleStandard Deviation 1.68
Caffeine 100 mgPain Intensity Difference (PID)2 hours post-dose0.7 Points on scaleStandard Deviation 1.99
Caffeine 100 mgPain Intensity Difference (PID)3 hours post-dose0.4 Points on scaleStandard Deviation 1.94
Caffeine 100 mgPain Intensity Difference (PID)4 hours post-dose0.6 Points on scaleStandard Deviation 2.19
Caffeine 100 mgPain Intensity Difference (PID)5 hours post-dose0.5 Points on scaleStandard Deviation 2.11
Caffeine 100 mgPain Intensity Difference (PID)6 hours post-dose0.6 Points on scaleStandard Deviation 2.34
Caffeine 100 mgPain Intensity Difference (PID)7 hours post-dose0.6 Points on scaleStandard Deviation 2.3
Caffeine 100 mgPain Intensity Difference (PID)8 hours post-dose0.6 Points on scaleStandard Deviation 2.3
Caffeine 100 mgPain Intensity Difference (PID)9 hours post dose0.6 Points on scaleStandard Deviation 2.47
Caffeine 100 mgPain Intensity Difference (PID)10 hours post-dose0.4 Points on scaleStandard Deviation 2.25
Caffeine 100 mgPain Intensity Difference (PID)11 hours post-dose0.4 Points on scaleStandard Deviation 2.34
Caffeine 100 mgPain Intensity Difference (PID)12 hours post-dose0.4 Points on scaleStandard Deviation 2.29
Caffeine 100 mgPain Intensity Difference (PID)16 hours post-dose0.4 Points on scaleStandard Deviation 2.27
Caffeine 100 mgPain Intensity Difference (PID)18 hours post-dose0.4 Points on scaleStandard Deviation 2.27
Caffeine 100 mgPain Intensity Difference (PID)20 hours post-dose0.4 Points on scaleStandard Deviation 2.33
Caffeine 100 mgPain Intensity Difference (PID)22 hours post-dose0.5 Points on scaleStandard Deviation 2.55
Caffeine 100 mgPain Intensity Difference (PID)24 hours post-dose0.6 Points on scaleStandard Deviation 2.62
PlaceboPain Intensity Difference (PID)16 hours post-dose1.2 Points on scaleStandard Deviation 3.21
PlaceboPain Intensity Difference (PID)9 hours post dose1.3 Points on scaleStandard Deviation 3.15
PlaceboPain Intensity Difference (PID)8 hours post-dose1.2 Points on scaleStandard Deviation 3
PlaceboPain Intensity Difference (PID)7 hours post-dose1.2 Points on scaleStandard Deviation 2.94
PlaceboPain Intensity Difference (PID)0.5 hours post-dose0.6 Points on scaleStandard Deviation 1.18
PlaceboPain Intensity Difference (PID)18 hours post-dose1.2 Points on scaleStandard Deviation 3.22
PlaceboPain Intensity Difference (PID)6 hours post-dose1.2 Points on scaleStandard Deviation 3.01
PlaceboPain Intensity Difference (PID)5 hours post-dose1.2 Points on scaleStandard Deviation 2.84
PlaceboPain Intensity Difference (PID)4 hours post-dose1.4 Points on scaleStandard Deviation 2.99
PlaceboPain Intensity Difference (PID)Baseline7.7 Points on scaleStandard Deviation 0.99
PlaceboPain Intensity Difference (PID)20 hours post-dose1.2 Points on scaleStandard Deviation 3.28
PlaceboPain Intensity Difference (PID)3 hours post-dose1.1 Points on scaleStandard Deviation 2.64
PlaceboPain Intensity Difference (PID)2 hours post-dose0.9 Points on scaleStandard Deviation 2.48
PlaceboPain Intensity Difference (PID)1.5 hours post-dose0.6 Points on scaleStandard Deviation 2.17
PlaceboPain Intensity Difference (PID)24 hours post-dose1.5 Points on scaleStandard Deviation 3.63
PlaceboPain Intensity Difference (PID)22 hours post-dose1.4 Points on scaleStandard Deviation 3.51
PlaceboPain Intensity Difference (PID)14 hours post-dose1.3 Points on scaleStandard Deviation 3.32
PlaceboPain Intensity Difference (PID)12 hours post-dose1.3 Points on scaleStandard Deviation 3.32
PlaceboPain Intensity Difference (PID)11 hours post-dose1.2 Points on scaleStandard Deviation 3.23
PlaceboPain Intensity Difference (PID)10 hours post-dose1.3 Points on scaleStandard Deviation 3.24
PlaceboPain Intensity Difference (PID)1 hour post-dose0.7 Points on scaleStandard Deviation 1.89
Secondary

Pain Relief Score

Pain Relief Score (PRS): 0 = No Relief; 1 = A Little Relief; 2 = Some Relief; 3 = A Lot of Relief; 4 = Complete Relief.

Time frame: Up to 24 hours post-dose

ArmMeasureGroupValue (MEAN)Dispersion
Naproxen Sodium/ Caffeine 220/65 mgPain Relief Score7 hours post-dose2.1 Points on scaleStandard Deviation 1.27
Naproxen Sodium/ Caffeine 220/65 mgPain Relief Score22 hours post-dose1.5 Points on scaleStandard Deviation 1.51
Naproxen Sodium/ Caffeine 220/65 mgPain Relief Score11 hours post-dose1.8 Points on scaleStandard Deviation 1.38
Naproxen Sodium/ Caffeine 220/65 mgPain Relief Score8 hours post-dose2.1 Points on scaleStandard Deviation 1.28
Naproxen Sodium/ Caffeine 220/65 mgPain Relief Score1.5 hours post-dose2.3 Points on scaleStandard Deviation 1.07
Naproxen Sodium/ Caffeine 220/65 mgPain Relief Score10 hours post-dose1.9 Points on scaleStandard Deviation 1.35
Naproxen Sodium/ Caffeine 220/65 mgPain Relief Score9 hours post-dose2.0 Points on scaleStandard Deviation 1.33
Naproxen Sodium/ Caffeine 220/65 mgPain Relief Score0.5 hours post-dose1.3 Points on scaleStandard Deviation 0.93
Naproxen Sodium/ Caffeine 220/65 mgPain Relief Score2 hours post-dose2.3 Points on scaleStandard Deviation 1.13
Naproxen Sodium/ Caffeine 220/65 mgPain Relief Score24 hours post-dose1.6 Points on scaleStandard Deviation 1.53
Naproxen Sodium/ Caffeine 220/65 mgPain Relief Score20 hours post-dose1.5 Points on scaleStandard Deviation 1.44
Naproxen Sodium/ Caffeine 220/65 mgPain Relief Score3 hours post-dose2.3 Points on scaleStandard Deviation 1.19
Naproxen Sodium/ Caffeine 220/65 mgPain Relief Score1 hour post-dose2.0 Points on scaleStandard Deviation 1.04
Naproxen Sodium/ Caffeine 220/65 mgPain Relief Score18 hours post-dose1.5 Points on scaleStandard Deviation 1.45
Naproxen Sodium/ Caffeine 220/65 mgPain Relief Score4 hours post-dose2.2 Points on scaleStandard Deviation 1.2
Naproxen Sodium/ Caffeine 220/65 mgPain Relief Score16 hours post-dose1.5 Points on scaleStandard Deviation 1.45
Naproxen Sodium/ Caffeine 220/65 mgPain Relief Score5 hours post-dose2.1 Points on scaleStandard Deviation 1.24
Naproxen Sodium/ Caffeine 220/65 mgPain Relief Score14 hours post-dose1.6 Points on scaleStandard Deviation 1.44
Naproxen Sodium/ Caffeine 220/65 mgPain Relief Score6 hours post-dose2.2 Points on scaleStandard Deviation 1.26
Naproxen Sodium/ Caffeine 220/65 mgPain Relief Score12 hours post-dose1.7 Points on scaleStandard Deviation 1.4
Naproxen Sodium/Caffeine 2x220/65 mgPain Relief Score5 hours post-dose2.5 Points on scaleStandard Deviation 1.13
Naproxen Sodium/Caffeine 2x220/65 mgPain Relief Score7 hours post-dose2.3 Points on scaleStandard Deviation 1.16
Naproxen Sodium/Caffeine 2x220/65 mgPain Relief Score3 hours post-dose2.7 Points on scaleStandard Deviation 1.06
Naproxen Sodium/Caffeine 2x220/65 mgPain Relief Score0.5 hours post-dose1.5 Points on scaleStandard Deviation 1.01
Naproxen Sodium/Caffeine 2x220/65 mgPain Relief Score10 hours post-dose2.1 Points on scaleStandard Deviation 1.35
Naproxen Sodium/Caffeine 2x220/65 mgPain Relief Score22 hours post-dose1.5 Points on scaleStandard Deviation 1.5
Naproxen Sodium/Caffeine 2x220/65 mgPain Relief Score8 hours post-dose2.2 Points on scaleStandard Deviation 1.23
Naproxen Sodium/Caffeine 2x220/65 mgPain Relief Score16 hours post-dose1.5 Points on scaleStandard Deviation 1.46
Naproxen Sodium/Caffeine 2x220/65 mgPain Relief Score12 hours post-dose1.8 Points on scaleStandard Deviation 1.46
Naproxen Sodium/Caffeine 2x220/65 mgPain Relief Score9 hours post-dose2.1 Points on scaleStandard Deviation 1.28
Naproxen Sodium/Caffeine 2x220/65 mgPain Relief Score4 hours post-dose2.6 Points on scaleStandard Deviation 1.18
Naproxen Sodium/Caffeine 2x220/65 mgPain Relief Score1.5 hours post-dose2.6 Points on scaleStandard Deviation 0.87
Naproxen Sodium/Caffeine 2x220/65 mgPain Relief Score24 hours post-dose1.6 Points on scaleStandard Deviation 1.51
Naproxen Sodium/Caffeine 2x220/65 mgPain Relief Score1 hour post-dose2.4 Points on scaleStandard Deviation 0.9
Naproxen Sodium/Caffeine 2x220/65 mgPain Relief Score20 hours post-dose1.4 Points on scaleStandard Deviation 1.44
Naproxen Sodium/Caffeine 2x220/65 mgPain Relief Score11 hours post-dose2.0 Points on scaleStandard Deviation 1.41
Naproxen Sodium/Caffeine 2x220/65 mgPain Relief Score2 hours post-dose2.7 Points on scaleStandard Deviation 0.93
Naproxen Sodium/Caffeine 2x220/65 mgPain Relief Score14 hours post-dose1.6 Points on scaleStandard Deviation 1.51
Naproxen Sodium/Caffeine 2x220/65 mgPain Relief Score6 hours post-dose2.5 Points on scaleStandard Deviation 1.12
Naproxen Sodium/Caffeine 2x220/65 mgPain Relief Score18 hours post-dose1.4 Points on scaleStandard Deviation 1.44
Naproxen Sodium 220 mgPain Relief Score20 hours post-dose1.3 Points on scaleStandard Deviation 1.46
Naproxen Sodium 220 mgPain Relief Score0.5 hours post-dose1.5 Points on scaleStandard Deviation 0.97
Naproxen Sodium 220 mgPain Relief Score1 hour post-dose2.1 Points on scaleStandard Deviation 0.99
Naproxen Sodium 220 mgPain Relief Score1.5 hours post-dose2.3 Points on scaleStandard Deviation 0.94
Naproxen Sodium 220 mgPain Relief Score2 hours post-dose2.5 Points on scaleStandard Deviation 0.99
Naproxen Sodium 220 mgPain Relief Score3 hours post-dose2.4 Points on scaleStandard Deviation 1.11
Naproxen Sodium 220 mgPain Relief Score4 hours post-dose2.3 Points on scaleStandard Deviation 1.2
Naproxen Sodium 220 mgPain Relief Score5 hours post-dose2.3 Points on scaleStandard Deviation 1.28
Naproxen Sodium 220 mgPain Relief Score6 hours post-dose2.1 Points on scaleStandard Deviation 1.28
Naproxen Sodium 220 mgPain Relief Score7 hours post-dose2.0 Points on scaleStandard Deviation 1.28
Naproxen Sodium 220 mgPain Relief Score8 hours post-dose1.8 Points on scaleStandard Deviation 1.36
Naproxen Sodium 220 mgPain Relief Score9 hours post-dose1.8 Points on scaleStandard Deviation 1.39
Naproxen Sodium 220 mgPain Relief Score10 hours post-dose1.7 Points on scaleStandard Deviation 1.42
Naproxen Sodium 220 mgPain Relief Score11 hours post-dose1.6 Points on scaleStandard Deviation 1.45
Naproxen Sodium 220 mgPain Relief Score12 hours post-dose1.5 Points on scaleStandard Deviation 1.47
Naproxen Sodium 220 mgPain Relief Score14 hours post-dose1.4 Points on scaleStandard Deviation 1.46
Naproxen Sodium 220 mgPain Relief Score16 hours post-dose1.3 Points on scaleStandard Deviation 1.44
Naproxen Sodium 220 mgPain Relief Score18 hours post-dose1.3 Points on scaleStandard Deviation 1.43
Naproxen Sodium 220 mgPain Relief Score22 hours post-dose1.4 Points on scaleStandard Deviation 1.51
Naproxen Sodium 220 mgPain Relief Score24 hours post-dose1.4 Points on scaleStandard Deviation 1.56
Caffeine 100 mgPain Relief Score7 hours post-dose0.6 Points on scaleStandard Deviation 1.07
Caffeine 100 mgPain Relief Score22 hours post-dose0.5 Points on scaleStandard Deviation 1.18
Caffeine 100 mgPain Relief Score11 hours post-dose0.5 Points on scaleStandard Deviation 1.07
Caffeine 100 mgPain Relief Score6 hours post-dose0.6 Points on scaleStandard Deviation 1.07
Caffeine 100 mgPain Relief Score12 hours post-dose0.5 Points on scaleStandard Deviation 1.07
Caffeine 100 mgPain Relief Score5 hours post-dose0.5 Points on scaleStandard Deviation 1.03
Caffeine 100 mgPain Relief Score14 hours post-dose0.5 Points on scaleStandard Deviation 1.03
Caffeine 100 mgPain Relief Score4 hours post-dose0.6 Points on scaleStandard Deviation 0.99
Caffeine 100 mgPain Relief Score0.5 hours post-dose0.7 Points on scaleStandard Deviation 0.72
Caffeine 100 mgPain Relief Score16 hours post-dose0.5 Points on scaleStandard Deviation 1.03
Caffeine 100 mgPain Relief Score3 hours post-dose0.5 Points on scaleStandard Deviation 0.93
Caffeine 100 mgPain Relief Score18 hours post-dose0.5 Points on scaleStandard Deviation 1.03
Caffeine 100 mgPain Relief Score2 hours post-dose0.7 Points on scaleStandard Deviation 0.95
Caffeine 100 mgPain Relief Score1.5 hours post-dose0.6 Points on scaleStandard Deviation 0.88
Caffeine 100 mgPain Relief Score20 hours post-dose0.5 Points on scaleStandard Deviation 1.03
Caffeine 100 mgPain Relief Score1 hour post-dose0.7 Points on scaleStandard Deviation 0.9
Caffeine 100 mgPain Relief Score9 hours post-dose0.5 Points on scaleStandard Deviation 1.02
Caffeine 100 mgPain Relief Score8 hours post-dose0.5 Points on scaleStandard Deviation 1.03
Caffeine 100 mgPain Relief Score24 hours post-dose0.5 Points on scaleStandard Deviation 1.22
Caffeine 100 mgPain Relief Score10 hours post-dose0.5 Points on scaleStandard Deviation 1.05
PlaceboPain Relief Score1 hour post-dose0.8 Points on scaleStandard Deviation 0.96
PlaceboPain Relief Score6 hours post-dose0.9 Points on scaleStandard Deviation 1.3
PlaceboPain Relief Score2 hours post-dose0.9 Points on scaleStandard Deviation 1.17
PlaceboPain Relief Score24 hours post-dose0.9 Points on scaleStandard Deviation 1.51
PlaceboPain Relief Score11 hours post-dose0.8 Points on scaleStandard Deviation 1.34
PlaceboPain Relief Score8 hours post-dose0.8 Points on scaleStandard Deviation 1.21
PlaceboPain Relief Score5 hours post-dose0.8 Points on scaleStandard Deviation 1.17
PlaceboPain Relief Score22 hours post-dose0.9 Points on scaleStandard Deviation 1.46
PlaceboPain Relief Score18 hours post-dose0.7 Points on scaleStandard Deviation 1.25
PlaceboPain Relief Score12 hours post-dose0.8 Points on scaleStandard Deviation 1.34
PlaceboPain Relief Score10 hours post-dose0.8 Points on scaleStandard Deviation 1.31
PlaceboPain Relief Score4 hours post-dose1.0 Points on scaleStandard Deviation 1.35
PlaceboPain Relief Score0.5 hours post-dose0 Points on scaleStandard Deviation 0.65
PlaceboPain Relief Score1.5 hours post-dose0.8 Points on scaleStandard Deviation 1.04
PlaceboPain Relief Score14 hours post-dose0.8 Points on scaleStandard Deviation 1.29
PlaceboPain Relief Score7 hours post-dose0.9 Points on scaleStandard Deviation 1.28
PlaceboPain Relief Score3 hours post-dose1.0 Points on scaleStandard Deviation 1.25
PlaceboPain Relief Score9 hours post-dose0.8 Points on scaleStandard Deviation 1.28
PlaceboPain Relief Score20 hours post-dose0.8 Points on scaleStandard Deviation 1.31
PlaceboPain Relief Score16 hours post-dose0.7 Points on scaleStandard Deviation 1.25
Secondary

Peak Pain Intensity Difference (PID)

The Peak Pain Intensity (peak PID) refers to the maximum change in pain intensity from baseline observed at any post-dose time point using the Numerical Rating Scale from 0 to 10. Value of 0 score means no pain and 10 score result means the worst possible pain. Participants record their pain intensity assessment in the time frame points and the highest value is identified as the Peak Pain Intensity. A high peak pain intensuty (higher value on NRS) indicates severe pain and a less effective analgesic response, and a lower value signifies better pain control and a more effective response.

Time frame: Up to 24 hours post-dose

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
Naproxen Sodium/ Caffeine 220/65 mgPeak Pain Intensity Difference (PID)6.12 Points on scaleStandard Error 0.11
Naproxen Sodium/Caffeine 2x220/65 mgPeak Pain Intensity Difference (PID)6.26 Points on scaleStandard Error 0.11
Naproxen Sodium 220 mgPeak Pain Intensity Difference (PID)6.22 Points on scaleStandard Error 0.11
Caffeine 100 mgPeak Pain Intensity Difference (PID)6.30 Points on scaleStandard Error 0.18
PlaceboPeak Pain Intensity Difference (PID)6.33 Points on scaleStandard Error 0.19
p-value: =0.33495% CI: [-0.44, 0.15]ANCOVA
p-value: =0.78395% CI: [-0.25, 0.33]ANCOVA
p-value: =0.68795% CI: [-0.5, 0.33]ANCOVA
p-value: =0.92795% CI: [-0.53, 0.49]ANCOVA
p-value: =0.49295% CI: [-0.4, 0.19]ANCOVA
p-value: =0.83695% CI: [-0.46, 0.37]ANCOVA
p-value: =0.61195% CI: [-0.53, 0.31]ANCOVA
p-value: =0.37195% CI: [-0.6, 0.22]ANCOVA
p-value: =0.75295% CI: [-0.49, 0.35]ANCOVA
p-value: =0.32195% CI: [-0.63, 0.21]ANCOVA
Secondary

Sum of Pain Intensity Differences From 0 to 2, 4, 6, 12 and 24 Hours Post-dose

Pain intensity scale is the Numerical Rating Scale measured from 0 to 10, where 0 indicates no pain and 10 means the wors pain imaginable. Pain intensity Difference (PID) is calculated by subtracting the pain intensity at different time points in the post-dose time point from the pain intensity at baseline. The summed pain intensity difference (SPID) is to be calculated by multiplying the PID score at each post dose time point by the duration (in hours) since the preceding time point and then summing the values over the relevant time period. For SPID(0-i), i PIDs are summed up, which minimally is 0, if there is no pain relief or maximally i\*10, if there is very strong pain and significant pain relief.

Time frame: from 0 to 2, 4, 6, 12 and 24 hours post-dose

ArmMeasureGroupValue (LEAST_SQUARES_MEAN)Dispersion
Naproxen Sodium/ Caffeine 220/65 mgSum of Pain Intensity Differences From 0 to 2, 4, 6, 12 and 24 Hours Post-dose0-12 hours post-dose44.207 Points on scaleStandard Error 2.266
Naproxen Sodium/ Caffeine 220/65 mgSum of Pain Intensity Differences From 0 to 2, 4, 6, 12 and 24 Hours Post-dose0-2 hours post-dose7.347 Points on scaleStandard Error 0.341
Naproxen Sodium/ Caffeine 220/65 mgSum of Pain Intensity Differences From 0 to 2, 4, 6, 12 and 24 Hours Post-dose0-24 hours post-dose77.596 Points on scaleStandard Error 4.949
Naproxen Sodium/ Caffeine 220/65 mgSum of Pain Intensity Differences From 0 to 2, 4, 6, 12 and 24 Hours Post-dose0-4 hours post-dose15.899 Points on scaleStandard Error 0.688
Naproxen Sodium/ Caffeine 220/65 mgSum of Pain Intensity Differences From 0 to 2, 4, 6, 12 and 24 Hours Post-dose0-6 hours post-dose23.851 Points on scaleStandard Error 1.057
Naproxen Sodium/Caffeine 2x220/65 mgSum of Pain Intensity Differences From 0 to 2, 4, 6, 12 and 24 Hours Post-dose0-12 hours post-dose51.737 Points on scaleStandard Error 2.258
Naproxen Sodium/Caffeine 2x220/65 mgSum of Pain Intensity Differences From 0 to 2, 4, 6, 12 and 24 Hours Post-dose0-6 hours post-dose28.632 Points on scaleStandard Error 1.053
Naproxen Sodium/Caffeine 2x220/65 mgSum of Pain Intensity Differences From 0 to 2, 4, 6, 12 and 24 Hours Post-dose0-4 hours post-dose19.210 Points on scaleStandard Error 0.686
Naproxen Sodium/Caffeine 2x220/65 mgSum of Pain Intensity Differences From 0 to 2, 4, 6, 12 and 24 Hours Post-dose0-24 hours post-dose83.884 Points on scaleStandard Error 4.93
Naproxen Sodium/Caffeine 2x220/65 mgSum of Pain Intensity Differences From 0 to 2, 4, 6, 12 and 24 Hours Post-dose0-2 hours post-dose8.950 Points on scaleStandard Error 0.34
Naproxen Sodium 220 mgSum of Pain Intensity Differences From 0 to 2, 4, 6, 12 and 24 Hours Post-dose0-6 hours post-dose24.381 Points on scaleStandard Error 1.058
Naproxen Sodium 220 mgSum of Pain Intensity Differences From 0 to 2, 4, 6, 12 and 24 Hours Post-dose0-2 hours post-dose7.973 Points on scaleStandard Error 0.341
Naproxen Sodium 220 mgSum of Pain Intensity Differences From 0 to 2, 4, 6, 12 and 24 Hours Post-dose0-4 hours post-dose16.627 Points on scaleStandard Error 0.689
Naproxen Sodium 220 mgSum of Pain Intensity Differences From 0 to 2, 4, 6, 12 and 24 Hours Post-dose0-12 hours post-dose42.907 Points on scaleStandard Error 2.268
Naproxen Sodium 220 mgSum of Pain Intensity Differences From 0 to 2, 4, 6, 12 and 24 Hours Post-dose0-24 hours post-dose72.796 Points on scaleStandard Error 4.953
Caffeine 100 mgSum of Pain Intensity Differences From 0 to 2, 4, 6, 12 and 24 Hours Post-dose0-24 hours post-dose12.533 Points on scaleStandard Error 8.481
Caffeine 100 mgSum of Pain Intensity Differences From 0 to 2, 4, 6, 12 and 24 Hours Post-dose0-2 hours post-dose1.876 Points on scaleStandard Error 0.585
Caffeine 100 mgSum of Pain Intensity Differences From 0 to 2, 4, 6, 12 and 24 Hours Post-dose0-12 hours post-dose7.003 Points on scaleStandard Error 3.883
Caffeine 100 mgSum of Pain Intensity Differences From 0 to 2, 4, 6, 12 and 24 Hours Post-dose0-6 hours post-dose4.024 Points on scaleStandard Error 1.812
Caffeine 100 mgSum of Pain Intensity Differences From 0 to 2, 4, 6, 12 and 24 Hours Post-dose0-4 hours post-dose2.924 Points on scaleStandard Error 1.179
PlaceboSum of Pain Intensity Differences From 0 to 2, 4, 6, 12 and 24 Hours Post-dose0-6 hours post-dose6.308 Points on scaleStandard Error 1.849
PlaceboSum of Pain Intensity Differences From 0 to 2, 4, 6, 12 and 24 Hours Post-dose0-12 hours post-dose13.455 Points on scaleStandard Error 3.964
PlaceboSum of Pain Intensity Differences From 0 to 2, 4, 6, 12 and 24 Hours Post-dose0-2 hours post-dose1.567 Points on scaleStandard Error 0.597
PlaceboSum of Pain Intensity Differences From 0 to 2, 4, 6, 12 and 24 Hours Post-dose0-24 hours post-dose28.400 Points on scaleStandard Error 8.656
PlaceboSum of Pain Intensity Differences From 0 to 2, 4, 6, 12 and 24 Hours Post-dose0-4 hours post-dose3.982 Points on scaleStandard Error 1.204
Comparison: 0-2 hours post-dosep-value: <0.00195% CI: [-2.548, -0.656]ANCOVA
Comparison: 0-2 hours post-dosep-value: =0.04395% CI: [0.029, 1.923]ANCOVA
Comparison: 0-2 hours post-dosep-value: <0.00195% CI: [4.766, 7.427]ANCOVA
Comparison: 0-2 hours post-dosep-value: =0.71195% CI: [-1.332, 1.951]ANCOVA
Comparison: 0-2 hours post-dosep-value: =0.19695% CI: [-1.575, 0.323]ANCOVA
Comparison: 0-2 hours post-dosep-value: <0.00195% CI: [5.744, 8.402]ANCOVA
Comparison: 0-2 hours post-dosep-value: <0.00195% CI: [5.055, 7.757]ANCOVA
Comparison: 0-2 hours post-dosep-value: <0.00195% CI: [4.141, 6.801]ANCOVA
Comparison: 0-2 hours post-dosep-value: <0.00195% CI: [6.033, 8.732]ANCOVA
Comparison: 0-2 hours post-dosep-value: <0.00195% CI: [4.43, 7.131]ANCOVA
Secondary

The Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Period

Time frame: Up to 24 hours post-dose

ArmMeasureGroupValue (NUMBER)
Naproxen Sodium/ Caffeine 220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 7 hours0.2 proportion
Naproxen Sodium/ Caffeine 220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 22 hours0.4 proportion
Naproxen Sodium/ Caffeine 220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 11 hours0.4 proportion
Naproxen Sodium/ Caffeine 220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 8 hours0.2 proportion
Naproxen Sodium/ Caffeine 220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 1.5 hour0.027 proportion
Naproxen Sodium/ Caffeine 220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 10 hours0.3 proportion
Naproxen Sodium/ Caffeine 220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 9 hours0.3 proportion
Naproxen Sodium/ Caffeine 220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Period0.5 hour0 proportion
Naproxen Sodium/ Caffeine 220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 2 hours0.1 proportion
Naproxen Sodium/ Caffeine 220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 24 hours0.4 proportion
Naproxen Sodium/ Caffeine 220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 20 hours0.4 proportion
Naproxen Sodium/ Caffeine 220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 3 hours0.1 proportion
Naproxen Sodium/ Caffeine 220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 1 hour0.007 proportion
Naproxen Sodium/ Caffeine 220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 18 hours0.4 proportion
Naproxen Sodium/ Caffeine 220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 4hours0.2 proportion
Naproxen Sodium/ Caffeine 220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 16 hours0.4 proportion
Naproxen Sodium/ Caffeine 220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 5 hours0.2 proportion
Naproxen Sodium/ Caffeine 220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 14 hours0.4 proportion
Naproxen Sodium/ Caffeine 220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 6 hours0.2 proportion
Naproxen Sodium/ Caffeine 220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 12 hours0.4 proportion
Naproxen Sodium/Caffeine 2x220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 5 hours0.1 proportion
Naproxen Sodium/Caffeine 2x220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 7 hours0.1 proportion
Naproxen Sodium/Caffeine 2x220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 3 hours0.1 proportion
Naproxen Sodium/Caffeine 2x220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Period0.5 hour0 proportion
Naproxen Sodium/Caffeine 2x220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 10 hours0.2 proportion
Naproxen Sodium/Caffeine 2x220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 22 hours0.4 proportion
Naproxen Sodium/Caffeine 2x220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 8 hours0.1 proportion
Naproxen Sodium/Caffeine 2x220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 16 hours0.4 proportion
Naproxen Sodium/Caffeine 2x220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 12 hours0.3 proportion
Naproxen Sodium/Caffeine 2x220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 9 hours0.2 proportion
Naproxen Sodium/Caffeine 2x220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 4hours0.1 proportion
Naproxen Sodium/Caffeine 2x220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 1.5 hour0.007 proportion
Naproxen Sodium/Caffeine 2x220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 24 hours0.4 proportion
Naproxen Sodium/Caffeine 2x220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 1 hour0 proportion
Naproxen Sodium/Caffeine 2x220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 20 hours0.4 proportion
Naproxen Sodium/Caffeine 2x220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 11 hours0.3 proportion
Naproxen Sodium/Caffeine 2x220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 2 hours0.034 proportion
Naproxen Sodium/Caffeine 2x220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 14 hours0.4 proportion
Naproxen Sodium/Caffeine 2x220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 6 hours0.1 proportion
Naproxen Sodium/Caffeine 2x220/65 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 18 hours0.4 proportion
Naproxen Sodium 220 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 20 hours0.5 proportion
Naproxen Sodium 220 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Period0.5 hour0 proportion
Naproxen Sodium 220 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 1 hour0.007 proportion
Naproxen Sodium 220 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 1.5 hour0.007 proportion
Naproxen Sodium 220 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 2 hours0.048 proportion
Naproxen Sodium 220 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 3 hours0.1 proportion
Naproxen Sodium 220 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 4hours0.1 proportion
Naproxen Sodium 220 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 5 hours0.1 proportion
Naproxen Sodium 220 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 6 hours0.2 proportion
Naproxen Sodium 220 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 7 hours0.2 proportion
Naproxen Sodium 220 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 8 hours0.3 proportion
Naproxen Sodium 220 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 9 hours0.3 proportion
Naproxen Sodium 220 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 10 hours0.4 proportion
Naproxen Sodium 220 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 11 hours0.4 proportion
Naproxen Sodium 220 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 12 hours0.4 proportion
Naproxen Sodium 220 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 14 hours0.4 proportion
Naproxen Sodium 220 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 16 hours0.5 proportion
Naproxen Sodium 220 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 18 hours0.5 proportion
Naproxen Sodium 220 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 22 hours0.5 proportion
Naproxen Sodium 220 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 24 hours0.5 proportion
Caffeine 100 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 7 hours0.8 proportion
Caffeine 100 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 22 hours0.8 proportion
Caffeine 100 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 11 hours0.8 proportion
Caffeine 100 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 6 hours0.8 proportion
Caffeine 100 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 12 hours0.8 proportion
Caffeine 100 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 5 hours0.7 proportion
Caffeine 100 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 14 hours0.8 proportion
Caffeine 100 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 4hours0.7 proportion
Caffeine 100 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Period0.5 hour0 proportion
Caffeine 100 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 16 hours0.8 proportion
Caffeine 100 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 3 hours0.7 proportion
Caffeine 100 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 18 hours0.8 proportion
Caffeine 100 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 2 hours0.4 proportion
Caffeine 100 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 1.5 hour0.3 proportion
Caffeine 100 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 20 hours0.8 proportion
Caffeine 100 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 1 hour0.04 proportion
Caffeine 100 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 9 hours0.8 proportion
Caffeine 100 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 8 hours0.8 proportion
Caffeine 100 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 24 hours0.8 proportion
Caffeine 100 mgThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 10 hours0.8 proportion
PlaceboThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 1 hour0.02 proportion
PlaceboThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 6 hours0.6 proportion
PlaceboThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 2 hours0.5 proportion
PlaceboThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 24 hours0.7 proportion
PlaceboThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 11 hours0.7 proportion
PlaceboThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 8 hours0.6 proportion
PlaceboThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 5 hours0.6 proportion
PlaceboThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 22 hours0.7 proportion
PlaceboThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 18 hours0.7 proportion
PlaceboThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 12 hours0.7 proportion
PlaceboThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 10 hours0.7 proportion
PlaceboThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 4hours0.6 proportion
PlaceboThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Period0.5 hour0 proportion
PlaceboThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 1.5 hour0.2 proportion
PlaceboThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 14 hours0.7 proportion
PlaceboThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 7 hours0.6 proportion
PlaceboThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 3 hours0.5 proportion
PlaceboThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 9 hours0.7 proportion
PlaceboThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 20 hours0.7 proportion
PlaceboThe Cumulative Proportion of Participants Taking Rescue Medication Over the 24 Hour Periodless or equal 16 hours0.7 proportion
Secondary

Time to First Perceptible Relief Confirmed by Meaningful Relief Defined as the Time to Perceptible Pain Relief

Time frame: Up to 24 hours post-dose

ArmMeasureValue (MEDIAN)
Naproxen Sodium/ Caffeine 220/65 mgTime to First Perceptible Relief Confirmed by Meaningful Relief Defined as the Time to Perceptible Pain Relief0.83 Hours
Naproxen Sodium/Caffeine 2x220/65 mgTime to First Perceptible Relief Confirmed by Meaningful Relief Defined as the Time to Perceptible Pain Relief0.76 Hours
Naproxen Sodium 220 mgTime to First Perceptible Relief Confirmed by Meaningful Relief Defined as the Time to Perceptible Pain Relief0.79 Hours
Caffeine 100 mgTime to First Perceptible Relief Confirmed by Meaningful Relief Defined as the Time to Perceptible Pain ReliefNA Hours
PlaceboTime to First Perceptible Relief Confirmed by Meaningful Relief Defined as the Time to Perceptible Pain Relief5.63 Hours
p-value: =0.162ANCOVA
p-value: =0.319ANCOVA
p-value: <0.001ANCOVA
p-value: =0.343ANCOVA
p-value: =0.772ANCOVA
p-value: <0.001ANCOVA
p-value: <0.001ANCOVA
p-value: <0.001ANCOVA
p-value: <0.001ANCOVA
p-value: <0.001ANCOVA
Secondary

Time to First Perceptible Relief Measured by a Stopwatch

Time frame: Up to 24 hours post-dose

ArmMeasureValue (MEDIAN)
Naproxen Sodium/ Caffeine 220/65 mgTime to First Perceptible Relief Measured by a Stopwatch0.39 Hours
Naproxen Sodium/Caffeine 2x220/65 mgTime to First Perceptible Relief Measured by a Stopwatch0.35 Hours
Naproxen Sodium 220 mgTime to First Perceptible Relief Measured by a Stopwatch0.35 Hours
Caffeine 100 mgTime to First Perceptible Relief Measured by a Stopwatch0.60 Hours
PlaceboTime to First Perceptible Relief Measured by a Stopwatch1.93 Hours
p-value: =0.647ANCOVA
p-value: =0.714ANCOVA
p-value: =0.065ANCOVA
p-value: =0.742ANCOVA
p-value: <0.001ANCOVA
p-value: <0.001ANCOVA
p-value: <0.001ANCOVA
p-value: <0.001ANCOVA
p-value: <0.001ANCOVA
Secondary

Time to First Use of Rescue Medication

Time frame: Up to 24 hours post-dose

ArmMeasureValue (MEDIAN)
Naproxen Sodium/ Caffeine 220/65 mgTime to First Use of Rescue MedicationNA Hours
Naproxen Sodium/Caffeine 2x220/65 mgTime to First Use of Rescue MedicationNA Hours
Naproxen Sodium 220 mgTime to First Use of Rescue Medication19.72 Hours
Caffeine 100 mgTime to First Use of Rescue Medication2.07 Hours
PlaceboTime to First Use of Rescue Medication2.65 Hours
p-value: =0.963ANCOVA
p-value: =0.118ANCOVA
p-value: <0.001ANCOVA
p-value: =0.244ANCOVA
p-value: =0.139ANCOVA
p-value: <0.001ANCOVA
p-value: <0.001ANCOVA
p-value: <0.001ANCOVA
p-value: <0.001ANCOVA
p-value: <0.001ANCOVA
Secondary

Time to Meaningful Relief Measured by a Stopwatch

meaningful relief is the point when the participant perceives their pain as significant and meaningful to them using the double-stopwatched method that allows to differentiate between the onset of the analgesic effect (first perceptible pain relief) and the onset of meaningful pain relief

Time frame: Up to 24 hours post-dose

ArmMeasureValue (MEDIAN)
Naproxen Sodium/ Caffeine 220/65 mgTime to Meaningful Relief Measured by a Stopwatch0.83 Hours
Naproxen Sodium/Caffeine 2x220/65 mgTime to Meaningful Relief Measured by a Stopwatch0.76 Hours
Naproxen Sodium 220 mgTime to Meaningful Relief Measured by a Stopwatch0.79 Hours
Caffeine 100 mgTime to Meaningful Relief Measured by a StopwatchNA Hours
PlaceboTime to Meaningful Relief Measured by a Stopwatch5.63 Hours
p-value: =0.162ANCOVA
p-value: =0.319ANCOVA
p-value: <0.001ANCOVA
p-value: =0.343ANCOVA
p-value: <0.001ANCOVA
p-value: <0.001ANCOVA
p-value: <0.001ANCOVA
p-value: <0.001ANCOVA
p-value: <0.001ANCOVA
Secondary

Total Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-dose

Total Pain Relief (TOTPAR) is a cumulative measure that evaluates the overall pain relief over a specific time frame from 0-2,0-4,0-6,0-8,0-12 and 0-24 following drug administration. It is calculated by multiplying the pain relief score from the categorical pain relief scale at each time post-dose time by multiplying the duration (in hours) since the preceding time point and then adding these values. Categorical Pain Relief Scale measure the degree of pain relief using a scale from 0 to 4, in which 0 is no relief, 1 a little relief, 2 some relief, 3 a lot of relief and 4 complete relief. Higher values of TOTPAR indicates better pain relief and suggest that the investigational product provided consistence and meaningful pain relief over the period. Low TOTPAR values indicates minimal pain relief or short-lasting efficacy.

Time frame: up to 24 hours post-dose

ArmMeasureGroupValue (LEAST_SQUARES_MEAN)Dispersion
Naproxen Sodium/ Caffeine 220/65 mgTotal Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-dose0-2 hours post-dose3.284 Points on scaleStandard Error 0.114
Naproxen Sodium/ Caffeine 220/65 mgTotal Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-dose0-4 hours post-dose7.781 Points on scaleStandard Error 0.287
Naproxen Sodium/ Caffeine 220/65 mgTotal Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-dose0-6 hours post-dose12.098 Points on scaleStandard Error 0.465
Naproxen Sodium/ Caffeine 220/65 mgTotal Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-dose0-8 hours post-dose16.227 Points on scaleStandard Error 0.645
Naproxen Sodium/ Caffeine 220/65 mgTotal Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-dose0-12 hours post-dose23.512 Points on scaleStandard Error 1.029
Naproxen Sodium/ Caffeine 220/65 mgTotal Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-dose0-24 hours post-dose41.596 Points on scaleStandard Error 2.281
Naproxen Sodium/Caffeine 2x220/65 mgTotal Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-dose0-12 hours post-dose26.461 Points on scaleStandard Error 1.026
Naproxen Sodium/Caffeine 2x220/65 mgTotal Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-dose0-24 hours post-dose43.908 Points on scaleStandard Error 2.272
Naproxen Sodium/Caffeine 2x220/65 mgTotal Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-dose0-2 hours post-dose3.870 Points on scaleStandard Error 0.114
Naproxen Sodium/Caffeine 2x220/65 mgTotal Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-dose0-6 hours post-dose14.061 Points on scaleStandard Error 0.464
Naproxen Sodium/Caffeine 2x220/65 mgTotal Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-dose0-8 hours post-dose18.625 Points on scaleStandard Error 0.642
Naproxen Sodium/Caffeine 2x220/65 mgTotal Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-dose0-4 hours post-dose9.118 Points on scaleStandard Error 0.286
Naproxen Sodium 220 mgTotal Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-dose0-8 hours post-dose16.225 Points on scaleStandard Error 0.645
Naproxen Sodium 220 mgTotal Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-dose0-12 hours post-dose22.767 Points on scaleStandard Error 1.03
Naproxen Sodium 220 mgTotal Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-dose0-2 hours post-dose3.417 Points on scaleStandard Error 0.115
Naproxen Sodium 220 mgTotal Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-dose0-6 hours post-dose12.420 Points on scaleStandard Error 0.466
Naproxen Sodium 220 mgTotal Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-dose0-4 hours post-dose8.102 Points on scaleStandard Error 0.287
Naproxen Sodium 220 mgTotal Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-dose0-24 hours post-dose39.127 Points on scaleStandard Error 2.283
Caffeine 100 mgTotal Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-dose0-8 hours post-dose4.327 Points on scaleStandard Error 1.105
Caffeine 100 mgTotal Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-dose0-4 hours post-dose2.120 Points on scaleStandard Error 0.492
Caffeine 100 mgTotal Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-dose0-6 hours post-dose3.228 Points on scaleStandard Error 0.798
Caffeine 100 mgTotal Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-dose0-24 hours post-dose12.047 Points on scaleStandard Error 3.909
Caffeine 100 mgTotal Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-dose0-12 hours post-dose6.264 Points on scaleStandard Error 1.764
Caffeine 100 mgTotal Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-dose0-2 hours post-dose1.047 Points on scaleStandard Error 0.196
PlaceboTotal Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-dose0-12 hours post-dose9.700 Points on scaleStandard Error 1.801
PlaceboTotal Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-dose0-6 hours post-dose4.870 Points on scaleStandard Error 0.814
PlaceboTotal Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-dose0-4 hours post-dose3.168 Points on scaleStandard Error 0.502
PlaceboTotal Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-dose0-24 hours post-dose18.975 Points on scaleStandard Error 3.99
PlaceboTotal Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-dose0-8 hours post-dose6.552 Points on scaleStandard Error 1.128
PlaceboTotal Pain Relief (TOTPAR) From 0 to 2, 4, 6, 8, 12 and 24 Hours Post-dose0-2 hours post-dose1.216 Points on scaleStandard Error 0.2
Comparison: 0-6 hours post-dosep-value: =0.1595% CI: [-3.881, 0.597]ANCOVA
Comparison: 0-6 hours post-dosep-value: =0.62595% CI: [-1.617, 0.972]ANCOVA
Comparison: 0-6 hours post-dosep-value: <0.00195% CI: [9.02, 12.645]ANCOVA
Comparison: 0-6 hours post-dosep-value: <0.00195% CI: [5.707, 9.392]ANCOVA
Comparison: 0-2 hours post-dosep-value: <0.00195% CI: [-0.903, -0.269]ANCOVA
Comparison: 0-2 hours post-dosep-value: =0.00595% CI: [0.136, 0.771]ANCOVA
Comparison: 0-2 hours post-dosep-value: <0.00195% CI: [1.923, 2.815]ANCOVA
Comparison: 0-2 hours post-dosep-value: =0.54895% CI: [-0.719, 0.382]ANCOVA
Comparison: 0-2 hours post-dosep-value: =0.41595% CI: [-0.451, 0.186]ANCOVA
Comparison: 0-2 hours post-dosep-value: <0.00195% CI: [2.377, 3.268]ANCOVA
Comparison: 0-2 hours post-dosep-value: <0.00195% CI: [1.748, 2.654]ANCOVA
Comparison: 0-2 hours post-dosep-value: <0.00195% CI: [1.791, 2.683]ANCOVA
Comparison: 0-2 hours post-dosep-value: <0.00195% CI: [2.202, 3.106]ANCOVA
Comparison: 0-2 hours post-dosep-value: <0.00195% CI: [1.615, 2.521]ANCOVA
Comparison: 0-4 hours post-dosep-value: <0.00195% CI: [-2.133, -0.542]ANCOVA
Comparison: 0-4 hours post-dosep-value: =0.01295% CI: [0.22, 1.813]ANCOVA
Comparison: 0-4 hours post-dosep-value: <0.00195% CI: [4.864, 7.101]ANCOVA
Comparison: 0-4 hours post-dosep-value: =0.13695% CI: [-2.428, 0.332]ANCOVA
Comparison: 0-4 hours post-dosep-value: =0.4395% CI: [-1.119, 0.477]ANCOVA
Comparison: 0-4 hours post-dosep-value: <0.00195% CI: [5.881, 8.116]ANCOVA
Comparison: 0-4 hours post-dosep-value: <0.00195% CI: [3.798, 6.07]ANCOVA
Comparison: 0-4 hours post-dosep-value: <0.00195% CI: [4.543, 6.779]ANCOVA
Comparison: 0-4 hours post-dosep-value: <0.00195% CI: [4.816, 7.085]ANCOVA
Comparison: 0-4 hours post-dosep-value: <0.00195% CI: [3.478, 5.749]ANCOVA
Comparison: 0-6 hours post-dosep-value: =0.00395% CI: [-3.254, -0.673]ANCOVA
Comparison: 0-6 hours post-dosep-value: =0.01395% CI: [0.35, 2.933]ANCOVA
Comparison: 0-6 hours post-dosep-value: <0.00195% CI: [7.377, 11.006]ANCOVA
Comparison: 0-6 hours post-dosep-value: <0.00195% CI: [7.055, 10.683]ANCOVA
Comparison: 0-6 hours post-dosep-value: <0.00195% CI: [7.351, 11.031]ANCOVA
Comparison: 0-6 hours post-dosep-value: <0.00195% CI: [5.386, 9.07]ANCOVA
Comparison: 0-8 hours post-dosep-value: =0.00995% CI: [-4.185, -0.61]ANCOVA
Comparison: 0-8 hours post-dosep-value: =0.00995% CI: [0.61, 4.189]ANCOVA
Comparison: 0-8 hours post-dosep-value: <0.00195% CI: [9.384, 14.412]ANCOVA
Comparison: 0-8 hours post-dosep-value: =0.15995% CI: [-5.327, 0.877]ANCOVA
Comparison: 0-8 hours post-dosep-value: =0.99895% CI: [-1.792, 1.795]ANCOVA
Comparison: 0-8 hours post-dosep-value: <0.00195% CI: [11.787, 16.809]ANCOVA
Comparison: 0-8 hours post-dosep-value: <0.00195% CI: [7.12, 12.226]ANCOVA
Comparison: 0-8 hours post-dosep-value: <0.00195% CI: [9.387, 14.413]ANCOVA
Comparison: 0-8 hours post-dosep-value: <0.00195% CI: [9.523, 14.623]ANCOVA
Comparison: 0-8 hours post-dosep-value: <0.00195% CI: [7.123, 12.227]ANCOVA
Comparison: 0-12 hours post-dosep-value: =0.04395% CI: [-5.803, -0.095]ANCOVA
Comparison: 0-12 hours post-dosep-value: =0.01195% CI: [0.837, 6.55]ANCOVA
Comparison: 0-12 hours post-dosep-value: <0.00195% CI: [12.49, 20.517]ANCOVA
Comparison: 0-12 hours post-dosep-value: =0.17395% CI: [-8.389, 1.515]ANCOVA
Comparison: 0-12 hours post-dosep-value: =0.6195% CI: [-2.119, 3.608]ANCOVA
Comparison: 0-12 hours post-dosep-value: <0.00195% CI: [16.189, 24.206]ANCOVA
Comparison: 0-12 hours post-dosep-value: <0.00195% CI: [8.992, 17.143]ANCOVA
Comparison: 0-12 hours post-dosep-value: <0.00195% CI: [13.236, 21.261]ANCOVA
Comparison: 0-12 hours post-dosep-value: <0.00195% CI: [12.69, 20.831]ANCOVA
Comparison: 0-12 hours post-dosep-value: <0.00195% CI: [9.738, 17.886]ANCOVA
Comparison: 0-24 hours post-dosep-value: =0.47395% CI: [-8.635, 4.011]ANCOVA
Comparison: 0-24 hours post-dosep-value: <0.00195% CI: [18.188, 35.973]ANCOVA
Comparison: 0-24 hours post-dosep-value: =0.21595% CI: [-17.9, 4.044]ANCOVA
Comparison: 0-24 hours post-dosep-value: =0.44595% CI: [-3.876, 8.813]ANCOVA
Comparison: 0-24 hours post-dosep-value: <0.00195% CI: [11.122, 29.183]ANCOVA
Comparison: 0-24 hours post-dosep-value: <0.00195% CI: [15.914, 33.952]ANCOVA
Comparison: 0-24 hours post-dosep-value: <0.00195% CI: [13.594, 31.648]ANCOVA

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026