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A Phase 2 Study to Evaluate the Efficacy and Safety of TNX-102 SL in Patients With Multi-Site Pain Associated With Post-Acute Sequelae of SARS-CoV-2 Infection

A Phase 2, 14-week Double-Blind, Randomized, Multicenter, Placebo-Controlled Study to Evaluate the Efficacy and Safety of TNX-102 SL Taken Daily at Bedtime in Patients With Multisite Pain Associated With Post-Acute Sequelae of SARS-CoV-2 Infection (PASC)

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05472090
Acronym
PREVAIL
Enrollment
63
Registered
2022-07-25
Start date
2022-08-18
Completion date
2023-07-27
Last updated
2024-11-26

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

Conditions

COVID-19, Long COVID, Long Haul COVID, Post-Acute Sequelae of SARS-CoV-2 (PASC) Infection

Keywords

Multi-site pain, Sleep disturbance, PASC, COVID-19, Long COVID, Coronavirus infections

Brief summary

This is a Phase 2, randomized, parallel-group, double-blind, placebo-controlled, 14-week study designed to evaluate the efficacy and safety of TNX-102 SL 5.6 mg (2 x 2.8 mg tablets) taken once daily at bedtime for the management of multi-site pain associated with Long COVID.

Interventions

Patients will take 1 tablet of randomly assigned study drug sublingually starting on Day 1 for 2 weeks. At the Week 2 visit, all patients will have the dose increased to 2 tablets for 12 weeks.

Patients will take 1 tablet of randomly assigned study drug sublingually starting on Day 1 for 2 weeks. At the Week 2 visit, all patients will have the dose increased to 2 tablets for 12 weeks.

Sponsors

Tonix Pharmaceuticals, Inc.
Lead SponsorINDUSTRY

Study design

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

Eligibility

Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
No

Inclusion criteria

Major Inclusion Criteria: * The patient is male or female, 18 to 65 years of age, inclusive. * The patient has a polymerase chain reaction (PCR) confirmed history of SARS-CoV-2 infection at least 3 months prior to enrollment, based on a documented written positive viral test at the time of active infection. * The patient has new onset or significant worsening of pain that coincides with a prior COVID-19 infection and has symptoms that have been generally present for at least 3 months but no longer than 18 months. Major

Exclusion criteria

* The patient has been diagnosed with infectious or inflammatory arthritis (eg, rheumatoid arthritis, ankylosing spondylitis, psoriatic arthritis), systemic lupus erythematosus, untreated or active gout (ie, any acute attack within past 2 years is exclusionary), or meets criteria for another type of systemic autoimmune disease (eg, Sjogren's disease). * The patient has been diagnosed with a complex regional pain syndrome, fibromyalgia, failed back surgery syndrome, persistent or prevalent pain symptoms related to systemic disease (eg, diabetic peripheral neuropathy, post-herpetic neuropathy), untreated hyperparathyroidism, or a history of prior surgery, trauma, organ or tissue damage, or other source of pain that, in the Investigator's opinion, would confound or interfere with the assessment of the patient's symptoms or require excluded therapies during the patient's study participation.

Design outcomes

Primary

MeasureTime frameDescription
Daily Diary Pain NRSWeek 14Change from Baseline in the diary Numeric Rating Scale (NRS) weekly average of daily self-reported worst Long COVID pain intensity scores at the Week 14 endpoint. Scores range from 0 to 10 where a higher score means worse outcome.

Secondary

MeasureTime frameDescription
Daily Diary Sleep Quality NRSWeek 14Mean change from baseline in the weekly average of the daily diary numeric rating scale (NRS) assessment of sleep quality at the Week 14 endpoint. Scores range from 0 to 10 where a higher score means worse outcome.
PROMIS Fatigue -Short Form 8aWeek 14Change from Baseline in the Patient Reported Outcomes Measurement Information System (PROMIS) score for fatigue at the Week 14 endpoint. Subjects are asked to reflect on their fatigue symptoms in the past 7 days and respond to 8 questions on a 5 point scale (1 to 5) where a higher score indicates a worse outcome. The total score is reported on a range of 8 to 40. Raw scores are converted to T-scores based on US population with score of 50 as average with a standard deviation of 10.
PROMIS Cognitive Function - Abilities-Short Form 8aWeek 14Change from Baseline in the Patient Reported Outcomes Measurement Information System (PROMIS) score for cognitive function at the Week 14 endpoint. Subjects are asked to reflect on their cognitive function and abilities in the past 7 days and respond to 8 questions on a 5 point scale (1 to 5) where a higher score indicates a worse outcome. The total score is reported on a range of 8 to 40. Raw scores are converted to T-scores based on US population with score of 50 as average with a standard deviation of 10.

Countries

United States

Participant flow

Participants by arm

ArmCount
TNX-102 SL Tablet, 5.6 mg
1 x TNX-102 SL 2.8 mg Tablet taken sublingually each day at bedtime for 2 weeks, then 2 x TNX-102 SL 2.8 mg (5.6 mg) Tablet taken sublingually each day at bedtime for 12 weeks. TNX-102 SL: Patients will take 1 tablet of randomly assigned study drug sublingually starting on Day 1 for 2 weeks. At the Week 2 visit, all patients will have the dose increased to 2 tablets for 12 weeks.
32
Placebo SL Tablet
1 x Placebo Tablet taken sublingually each day at bedtime for 2 weeks, then 2 x Placebo Tablet taken sublingually each day at bedtime for 12 weeks. Placebo SL Tablet: Patients will take 1 tablet of randomly assigned study drug sublingually starting on Day 1 for 2 weeks. At the Week 2 visit, all patients will have the dose increased to 2 tablets for 12 weeks.
31
Total63

Withdrawals & dropouts

PeriodReasonFG000FG001
Overall StudyAdverse Event23
Overall StudyLack of Efficacy10
Overall StudyLost to Follow-up03
Overall StudyPhysician Decision10
Overall StudyWithdrawal by Subject20

Baseline characteristics

CharacteristicTNX-102 SL Tablet, 5.6 mgPlacebo SL TabletTotal
Age, Continuous48.6 years
STANDARD_DEVIATION 8.8
51.4 years
STANDARD_DEVIATION 10.01
50.0 years
STANDARD_DEVIATION 9.45
BMI29.78 kg/m^2
STANDARD_DEVIATION 4.067
29.49 kg/m^2
STANDARD_DEVIATION 4.439
29.64 kg/m^2
STANDARD_DEVIATION 4.222
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants1 Participants1 Participants
Race (NIH/OMB)
Asian
1 Participants0 Participants1 Participants
Race (NIH/OMB)
Black or African American
7 Participants5 Participants12 Participants
Race (NIH/OMB)
More than one race
3 Participants1 Participants4 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants
Race (NIH/OMB)
White
21 Participants24 Participants45 Participants
Sex: Female, Male
Female
21 Participants25 Participants46 Participants
Sex: Female, Male
Male
11 Participants6 Participants17 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
0 / 320 / 31
other
Total, other adverse events
12 / 322 / 31
serious
Total, serious adverse events
0 / 320 / 31

Outcome results

Primary

Daily Diary Pain NRS

Change from Baseline in the diary Numeric Rating Scale (NRS) weekly average of daily self-reported worst Long COVID pain intensity scores at the Week 14 endpoint. Scores range from 0 to 10 where a higher score means worse outcome.

Time frame: Week 14

Population: Intention-to-treat (ITT) population defined as all patients who were randomized and had at least one post-baseline daily diary entry.

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
TNX-102 SL Tablet, 5.6 mgDaily Diary Pain NRS-2.2 units on a scaleStandard Error 0.34
Placebo SL TabletDaily Diary Pain NRS-2.0 units on a scaleStandard Error 0.35
Secondary

Daily Diary Sleep Quality NRS

Mean change from baseline in the weekly average of the daily diary numeric rating scale (NRS) assessment of sleep quality at the Week 14 endpoint. Scores range from 0 to 10 where a higher score means worse outcome.

Time frame: Week 14

Population: Intention-to-treat (ITT) population defined as all patients who were randomized and had at least one post-baseline daily diary entry.

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
TNX-102 SL Tablet, 5.6 mgDaily Diary Sleep Quality NRS-2.1 units on a scaleStandard Error 0.38
Placebo SL TabletDaily Diary Sleep Quality NRS-1.6 units on a scaleStandard Error 0.39
Secondary

PROMIS Cognitive Function - Abilities-Short Form 8a

Change from Baseline in the Patient Reported Outcomes Measurement Information System (PROMIS) score for cognitive function at the Week 14 endpoint. Subjects are asked to reflect on their cognitive function and abilities in the past 7 days and respond to 8 questions on a 5 point scale (1 to 5) where a higher score indicates a worse outcome. The total score is reported on a range of 8 to 40. Raw scores are converted to T-scores based on US population with score of 50 as average with a standard deviation of 10.

Time frame: Week 14

Population: Intention-to-treat (ITT) population defined as all patients who were randomized and had at least one post-baseline daily diary entry.

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
TNX-102 SL Tablet, 5.6 mgPROMIS Cognitive Function - Abilities-Short Form 8a5.4 T-scoreStandard Error 1.55
Placebo SL TabletPROMIS Cognitive Function - Abilities-Short Form 8a3.5 T-scoreStandard Error 1.55
Secondary

PROMIS Fatigue -Short Form 8a

Change from Baseline in the Patient Reported Outcomes Measurement Information System (PROMIS) score for fatigue at the Week 14 endpoint. Subjects are asked to reflect on their fatigue symptoms in the past 7 days and respond to 8 questions on a 5 point scale (1 to 5) where a higher score indicates a worse outcome. The total score is reported on a range of 8 to 40. Raw scores are converted to T-scores based on US population with score of 50 as average with a standard deviation of 10.

Time frame: Week 14

Population: Intention-to-treat (ITT) population defined as all patients who were randomized and had at least one post-baseline daily diary entry.

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
TNX-102 SL Tablet, 5.6 mgPROMIS Fatigue -Short Form 8a-8.0 T-scoreStandard Error 1.65
Placebo SL TabletPROMIS Fatigue -Short Form 8a-3.2 T-scoreStandard Error 1.68

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