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Randomized, Double-Blind, Single-Dose, Efficacy and Safety Study of Test Acetaminophen Tablet in Postoperative Dental Pain

A Randomized, Double-Blind, Placebo- and Active- Controlled, Single-Dose, Efficacy and Safety Study of a Test Acetaminophen 500 mg Tablet in Postoperative Dental Pain

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03224403
Enrollment
664
Registered
2017-07-21
Start date
2017-07-19
Completion date
2018-04-12
Last updated
2021-04-15

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

Conditions

Post-operative Dental Pain

Brief summary

To evaluate analgesic onset, efficacy, and safety of 1000 mg acetaminophen administered as two Test Acetaminophen 500 mg tablets (Test ACM) compared with 1000 mg acetaminophen administered as two commercial acetaminophen 500 mg caplets (ACM) and 400 mg ibuprofen administered as two commercial ibuprofen 200 mg liquid-filled capsules (IBU) in the dental pain model following third-molar extractions.

Detailed description

This is a single-dose, randomized, double-blind, placebo- and active- controlled, parallel-group study to evaluate the analgesic onset, efficacy, and safety profile of Test ACM 1000 mg compared with two commercial products over a four-hour period after third-molar extractions. Subjects will undergo dental extraction of three or four third molars.

Interventions

DRUGTest acetaminophen

single dose of 2 Test acetaminophen 500 mg tablets

DRUGCommercial acetaminophen

single dose of 2 acetaminophen 500 mg caplets

DRUGCommercial ibuprofen

Single dose of 2 ibuprofen 200 mg Liquid-filled Capsules

DRUGPlacebo

2 placebo caplets

Sponsors

Johnson & Johnson Consumer and Personal Products Worldwide
CollaboratorINDUSTRY
Johnson & Johnson Consumer Inc., McNeil Consumer Healthcare Division
Lead SponsorINDUSTRY

Study design

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

Intervention model description

Post-operative dental pain following third molar extraction.

Eligibility

Sex/Gender
ALL
Age
17 Years to 50 Years
Healthy volunteers
No

Inclusion criteria

1. 17 to 50 years old 2. Weigh 100 lbs. or greater and have a body mass index (BMI) of 18 to 30 (inclusive) 3. Dental extraction of three or four third molars 4. Meets post-surgical pain criteria 5. Females of childbearing age must be willing to use acceptable method of birth control

Exclusion criteria

1. Currently pregnant or planning to be pregnant or nursing a baby 2. Known allergy to acetaminophen, nonsteroidal anti-inflammatory drugs (NSAIDs) including aspirin, as well as hydrocodone or other opioids 3. Inability to swallow whole large tablets or capsules 4. Have other conditions that the investigator feels may impact subject's safety and/or the integrity of the study 5. Use of pain medications 5 or more times per week 6. Have a history of chronic tranquilizer use, heavy drinking, or substance abuse in the last 5 years 7. History of endoscopically documented peptic ulcer disease or bleeding disorder in the last 2 years 8. Have a positive urine drug screen

Design outcomes

Primary

MeasureTime frameDescription
Time to Confirmed Perceptible Pain Reliefwithin 4 hoursMinutes until confirmed perceptible pain relief is achieved. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief.

Secondary

MeasureTime frameDescription
Time to Meaningful Pain ReliefWithin 4 hoursMinutes until meaningful pain relief is achieved. Stopwatch is started after the participant takes the study medication. The participants are instructed to stop the stopwatch when the relief from the starting pain is meaningful to them.
Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 30 Minutesby 30 minutesPercentage of participants with confirmed perceptible relief by 30 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.
Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 29 Minutesby 29 minutesPercentage of participants with confirmed perceptible relief by 29 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.
Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 28 Minutesby 28 minutesPercentage of participants with confirmed perceptible relief by 28 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.
Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 27 Minutesby 27 minutesPercentage of participants with confirmed perceptible relief by 27 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.
Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 26 Minutesby 26 minutesPercentage of participants with confirmed perceptible relief by 26 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.
Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 25 Minutesby 25 minutesPercentage of participants with confirmed perceptible relief by 25 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.
Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 24 Minutesby 24 minutesPercentage of participants with confirmed perceptible relief by 24 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.
Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 23 Minutesby 23 minutesPercentage of participants with confirmed perceptible relief by 23 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.
Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 22 Minutesby 22 minutesPercentage of participants with confirmed perceptible relief by 22 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.
Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 21 Minutesby 21 minutesPercentage of participants with confirmed perceptible relief by 21 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.
Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 20 Minutesby 20 minutesPercentage of participants with confirmed perceptible relief by 20 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.
Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 19 Minutesby 19 minutesPercentage of participants with confirmed perceptible relief by 19 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.
Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 18 Minutesby 18 minutesPercentage of participants with confirmed perceptible relief by 18 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.
Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 17 Minutesby 17 minutesPercentage of participants with confirmed perceptible relief by 17 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.
Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 16 Minutesby 16 minutesPercentage of participants with confirmed perceptible relief by 16 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.
Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 15 Minutesby 15 minutesPercentage of participants with confirmed perceptible relief by 15 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.
Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 14 Minutesby 14 minutesPercentage of participants with confirmed perceptible relief by 14 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.
Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 13 Minutesby 13 minutesPercentage of participants with confirmed perceptible relief by 13 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.
Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 12 Minutesby 12 minutesPercentage of participants with confirmed perceptible relief by 12 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.
Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 11 Minutesby 11 minutesPercentage of participants with confirmed perceptible relief by 11 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.

Countries

United States

Participant flow

Participants by arm

ArmCount
Placebo
Two placebo caplets taken orally
59
Test ACM 1000 mg
Two test acetaminophen 500 mg tablets taken orally
249
Commercial ACM 1000 mg
Two commercial acetaminophen 500 mg caplets taken orally
232
Commercial IBU 400 mg
Two commercial ibuprofen 200 mg liquid-filled capsules taken orally
124
Total664

Baseline characteristics

CharacteristicPlaceboTotalCommercial IBU 400 mgCommercial ACM 1000 mgTest ACM 1000 mg
Age, Continuous18.3 years
STANDARD_DEVIATION 1.91
18.9 years
STANDARD_DEVIATION 2.28
19.2 years
STANDARD_DEVIATION 2.56
18.9 years
STANDARD_DEVIATION 2.17
19.0 years
STANDARD_DEVIATION 2.31
Race (NIH/OMB)
American Indian or Alaska Native
1 Participants4 Participants1 Participants1 Participants1 Participants
Race (NIH/OMB)
Asian
0 Participants11 Participants5 Participants3 Participants3 Participants
Race (NIH/OMB)
Black or African American
1 Participants7 Participants1 Participants2 Participants3 Participants
Race (NIH/OMB)
More than one race
0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants12 Participants2 Participants4 Participants6 Participants
Race (NIH/OMB)
Unknown or Not Reported
2 Participants23 Participants7 Participants7 Participants7 Participants
Race (NIH/OMB)
White
55 Participants607 Participants108 Participants215 Participants229 Participants
Region of Enrollment
United States
59 Participants664 Participants124 Participants232 Participants249 Participants
Sex: Female, Male
Female
34 Participants362 Participants65 Participants124 Participants139 Participants
Sex: Female, Male
Male
25 Participants302 Participants59 Participants108 Participants110 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
deaths
Total, all-cause mortality
0 / 590 / 2490 / 2320 / 124
other
Total, other adverse events
9 / 5913 / 24916 / 2327 / 124
serious
Total, serious adverse events
1 / 591 / 2490 / 2320 / 124

Outcome results

Primary

Time to Confirmed Perceptible Pain Relief

Minutes until confirmed perceptible pain relief is achieved. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief.

Time frame: within 4 hours

Population: Analysis is based on the Intent-to-Treat (ITT) population, which included all participants who were randomized.

ArmMeasureValue (MEDIAN)
PlaceboTime to Confirmed Perceptible Pain ReliefNA minutes
Test ACM 1000 mgTime to Confirmed Perceptible Pain Relief15.7 minutes
Commercial ACM 1000 mgTime to Confirmed Perceptible Pain Relief20.2 minutes
Commercial IBU 400 mgTime to Confirmed Perceptible Pain Relief23.2 minutes
p-value: <0.001Wilcoxon test from SAS PROC LIFETEST
p-value: <0.001Wilcoxon test from SAS PROC LIFETEST
p-value: <0.001Wilcoxon test from SAS PROC LIFETEST
p-value: 0.035bootstrap re-sampling method
p-value: <0.001bootstrap re-sampling method
Secondary

Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 11 Minutes

Percentage of participants with confirmed perceptible relief by 11 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.

Time frame: by 11 minutes

Population: Analysis is based on the Intent-to-Treat (ITT) population, which included all participants who were randomized.

ArmMeasureValue (NUMBER)
PlaceboPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 11 Minutes8.5 Percentage of Participants
Test ACM 1000 mgPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 11 Minutes18.1 Percentage of Participants
p-value: 0.08Regression, Logistic
Secondary

Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 12 Minutes

Percentage of participants with confirmed perceptible relief by 12 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.

Time frame: by 12 minutes

Population: Analysis is based on the Intent-to-Treat (ITT) population, which included all participants who were randomized.

ArmMeasureValue (NUMBER)
PlaceboPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 12 Minutes8.5 Percentage of Participants
Test ACM 1000 mgPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 12 Minutes21.7 Percentage of Participants
p-value: 0.026Regression, Logistic
Secondary

Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 13 Minutes

Percentage of participants with confirmed perceptible relief by 13 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.

Time frame: by 13 minutes

Population: Analysis is based on the Intent-to-Treat (ITT) population, which included all participants who were randomized.

ArmMeasureValue (NUMBER)
PlaceboPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 13 Minutes8.5 Percentage of Participants
Test ACM 1000 mgPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 13 Minutes25.7 Percentage of Participants
p-value: 0.007Regression, Logistic
Secondary

Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 14 Minutes

Percentage of participants with confirmed perceptible relief by 14 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.

Time frame: by 14 minutes

Population: Analysis is based on the Intent-to-Treat (ITT) population, which included all participants who were randomized.

ArmMeasureValue (NUMBER)
PlaceboPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 14 Minutes8.5 Percentage of Participants
Test ACM 1000 mgPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 14 Minutes31.7 Percentage of Participants
p-value: <0.001Regression, Logistic
Secondary

Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 15 Minutes

Percentage of participants with confirmed perceptible relief by 15 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.

Time frame: by 15 minutes

Population: Analysis is based on the Intent-to-Treat (ITT) population, which included all participants who were randomized.

ArmMeasureValue (NUMBER)
PlaceboPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 15 Minutes10.2 Percentage of Participants
Test ACM 1000 mgPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 15 Minutes41.4 Percentage of Participants
p-value: <0.001Regression, Logistic
Secondary

Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 16 Minutes

Percentage of participants with confirmed perceptible relief by 16 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.

Time frame: by 16 minutes

Population: Analysis is based on the Intent-to-Treat (ITT) population, which included all participants who were randomized.

ArmMeasureValue (NUMBER)
PlaceboPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 16 Minutes10.2 Percentage of Participants
Test ACM 1000 mgPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 16 Minutes52.2 Percentage of Participants
p-value: <0.001Regression, Logistic
Secondary

Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 17 Minutes

Percentage of participants with confirmed perceptible relief by 17 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.

Time frame: by 17 minutes

Population: Analysis is based on the Intent-to-Treat (ITT) population, which included all participants who were randomized.

ArmMeasureValue (NUMBER)
PlaceboPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 17 Minutes13.6 Percentage of Participants
Test ACM 1000 mgPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 17 Minutes53.8 Percentage of Participants
p-value: <0.001Regression, Logistic
Secondary

Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 18 Minutes

Percentage of participants with confirmed perceptible relief by 18 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.

Time frame: by 18 minutes

Population: Analysis is based on the Intent-to-Treat (ITT) population, which included all participants who were randomized.

ArmMeasureValue (NUMBER)
PlaceboPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 18 Minutes13.6 Percentage of Participants
Test ACM 1000 mgPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 18 Minutes55.0 Percentage of Participants
p-value: <0.001Regression, Logistic
Secondary

Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 19 Minutes

Percentage of participants with confirmed perceptible relief by 19 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.

Time frame: by 19 minutes

Population: Analysis is based on the Intent-to-Treat (ITT) population, which included all participants who were randomized.

ArmMeasureValue (NUMBER)
PlaceboPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 19 Minutes13.6 Percentage of Participants
Test ACM 1000 mgPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 19 Minutes56.2 Percentage of Participants
p-value: <0.001Regression, Logistic
Secondary

Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 20 Minutes

Percentage of participants with confirmed perceptible relief by 20 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.

Time frame: by 20 minutes

Population: Analysis is based on the Intent-to-Treat (ITT) population, which included all participants who were randomized.

ArmMeasureValue (NUMBER)
PlaceboPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 20 Minutes13.6 Percentage of Participants
Test ACM 1000 mgPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 20 Minutes58.2 Percentage of Participants
p-value: <0.001Regression, Logistic
Secondary

Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 21 Minutes

Percentage of participants with confirmed perceptible relief by 21 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.

Time frame: by 21 minutes

Population: Analysis is based on the Intent-to-Treat (ITT) population, which included all participants who were randomized.

ArmMeasureValue (NUMBER)
PlaceboPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 21 Minutes15.3 Percentage of Participants
Test ACM 1000 mgPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 21 Minutes60.2 Percentage of Participants
p-value: <0.001Regression, Logistic
Secondary

Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 22 Minutes

Percentage of participants with confirmed perceptible relief by 22 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.

Time frame: by 22 minutes

Population: Analysis is based on the Intent-to-Treat (ITT) population, which included all participants who were randomized.

ArmMeasureValue (NUMBER)
PlaceboPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 22 Minutes16.9 Percentage of Participants
Test ACM 1000 mgPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 22 Minutes62.7 Percentage of Participants
p-value: <0.001Regression, Logistic
Secondary

Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 23 Minutes

Percentage of participants with confirmed perceptible relief by 23 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.

Time frame: by 23 minutes

Population: Analysis is based on the Intent-to-Treat (ITT) population, which included all participants who were randomized.

ArmMeasureValue (NUMBER)
PlaceboPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 23 Minutes18.6 Percentage of Participants
Test ACM 1000 mgPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 23 Minutes66.3 Percentage of Participants
p-value: <0.001Regression, Logistic
Secondary

Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 24 Minutes

Percentage of participants with confirmed perceptible relief by 24 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.

Time frame: by 24 minutes

Population: Analysis is based on the Intent-to-Treat (ITT) population, which included all participants who were randomized.

ArmMeasureValue (NUMBER)
PlaceboPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 24 Minutes18.6 Percentage of Participants
Test ACM 1000 mgPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 24 Minutes67.5 Percentage of Participants
p-value: <0.001Regression, Logistic
Secondary

Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 25 Minutes

Percentage of participants with confirmed perceptible relief by 25 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.

Time frame: by 25 minutes

Population: Analysis is based on the Intent-to-Treat (ITT) population, which included all participants who were randomized.

ArmMeasureValue (NUMBER)
PlaceboPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 25 Minutes18.6 Percentage of Participants
Test ACM 1000 mgPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 25 Minutes69.5 Percentage of Participants
p-value: <0.001Regression, Logistic
Secondary

Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 26 Minutes

Percentage of participants with confirmed perceptible relief by 26 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.

Time frame: by 26 minutes

Population: Analysis is based on the Intent-to-Treat (ITT) population, which included all participants who were randomized.

ArmMeasureValue (NUMBER)
PlaceboPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 26 Minutes18.6 Percentage of Participants
Test ACM 1000 mgPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 26 Minutes69.9 Percentage of Participants
p-value: <0.001Regression, Logistic
Secondary

Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 27 Minutes

Percentage of participants with confirmed perceptible relief by 27 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.

Time frame: by 27 minutes

Population: Analysis is based on the Intent-to-Treat (ITT) population, which included all participants who were randomized.

ArmMeasureValue (NUMBER)
PlaceboPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 27 Minutes18.6 Percentage of Participants
Test ACM 1000 mgPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 27 Minutes70.7 Percentage of Participants
p-value: <0.001Regression, Logistic
Secondary

Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 28 Minutes

Percentage of participants with confirmed perceptible relief by 28 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.

Time frame: by 28 minutes

Population: Analysis is based on the Intent-to-Treat (ITT) population, which included all participants who were randomized.

ArmMeasureValue (NUMBER)
PlaceboPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 28 Minutes18.6 Percentage of Participants
Test ACM 1000 mgPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 28 Minutes70.7 Percentage of Participants
p-value: <0.001Regression, Logistic
Secondary

Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 29 Minutes

Percentage of participants with confirmed perceptible relief by 29 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.

Time frame: by 29 minutes

Population: Analysis is based on the Intent-to-Treat (ITT) population, which included all participants who were randomized.

ArmMeasureValue (NUMBER)
PlaceboPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 29 Minutes18.6 Percentage of Participants
Test ACM 1000 mgPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 29 Minutes73.5 Percentage of Participants
p-value: <0.001Regression, Logistic
Secondary

Percentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 30 Minutes

Percentage of participants with confirmed perceptible relief by 30 minutes. Stopwatch is started after the participant takes the study medication. The participant is instructed to stop the stopwatch when they first begin to feel any pain relief. The perceptible pain relief is confirmed if the participant also stopped the second stopwatch indicating meaningful pain relief. Test acetaminophen 1000 mg and placebo were compared on the percentage of subjects with confirmed perceptible relief starting at 30 minutes and testing successively earlier minutes (29, 28, etc) until the difference was no longer statistically significant. The earliest significant time was identified.

Time frame: by 30 minutes

Population: Analysis is based on the Intent-to-Treat (ITT) population, which included all participants who were randomized.

ArmMeasureValue (NUMBER)
PlaceboPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 30 Minutes18.6 Percentage of Participants
Test ACM 1000 mgPercentage of Participants With Confirmed Perceptible Relief From 30 Minutes to Successively Earlier Minutes in One-minute Increments - 30 Minutes75.1 Percentage of Participants
p-value: <0.001Regression, Logistic
Secondary

Time to Meaningful Pain Relief

Minutes until meaningful pain relief is achieved. Stopwatch is started after the participant takes the study medication. The participants are instructed to stop the stopwatch when the relief from the starting pain is meaningful to them.

Time frame: Within 4 hours

Population: Analysis is based on the Intent-to-Treat (ITT) population, which included all participants who were randomized.

ArmMeasureValue (MEDIAN)
PlaceboTime to Meaningful Pain ReliefNA minutes
Test ACM 1000 mgTime to Meaningful Pain Relief46.1 minutes
Commercial ACM 1000 mgTime to Meaningful Pain Relief44.2 minutes
Commercial IBU 400 mgTime to Meaningful Pain Relief43.9 minutes
p-value: <0.001Wilcoxon test from SAS PROC LIFETEST
p-value: <0.001Wilcoxon test from SAS PROC LIFETEST
p-value: <0.001Wilcoxon test from SAS PROC LIFETEST
p-value: 0.671bootstrap re-sampling method
p-value: 0.487bootstrap re-sampling method

Source: ClinicalTrials.gov · Data processed: Feb 7, 2026