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Methadone +BEM/RZR

Phase 1

Healthy Volunteer Study | Small molecule | Other |Atea Pharmaceuticals, Inc.|Last Updated: Apr 13, 2026

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
CONTROLLEDBiomarker
Total Trials1
Total Enrollment32
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT07314346Drug-drug Interaction Study of Bemnifosbuvir/Ruzasvir (BEM/RZR) and Buprenorphine/Naloxone or MethadonePHASE1 RECRUITING 32Jan 7, 2025Jun 1, 2026Apr 13, 20263 United States
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Study Endpoints
Primary Endpoints
Effect of BEM/RZR on PK of buprenorphine,norbuprenorphine and naloxone
Day -5 to Day 13

Cmax

Effect of BEM/RZR on PK of methadone
Day -5 to Day 13

Cmax

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Study Design & Arms
AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
(n=16) buprenorphine/naloxone + BEM/RZREXPERIMENTAL -
(n=16) methadone + BEM/RZREXPERIMENTAL -
Interventions
NameTypeDescription
Buprenorphine/Naloxone + BEM/RZRDRUGDay -5 to Day -1:buprenorphine/naloxone as individualized QD doses up to 24mg/6mg. Day 1 to Day 5:Individualized QD doses of buprenorphine/naloxone. Day 6 to Day 12:Individualized QD doses of buprenorphine/naloxone + BEM 550mg/RZR 180mg QD. Day 13 Individualized QD doses of buprenorphine/naloxone.
Methadone +BEM/RZRDRUGDay -5 to Day -1:methadone individualized QD doses: 30-150mg. Day 1 to Day 5:Individualized QD does of methadone. Day 6 to Day 12:Individualized QD doses of methadone + BEM 550mg/RZR 180mg QD. Day 13 Individualized QD doses of methadone.
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Eligibility Criteria
Age Range18 Years — 65 Years
SexALL
Healthy VolunteersYes
Study Sites3

Inclusion Criteria: * Must agree to use acceptable contraceptive methods through at least 90 days after the last dose of study drug. * Minimum body weight of 50 kg and body mass index (BMI) of 18-32 kg/ m2. * Willing to comply with the study requirements and to provide written informed consent. Ex...

Countries:United States
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Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT07314346Status: NOT_YET_RECRUITING → RECRUITING
LOWMay 24, 2026NCT07314346studyFirstPostDate: changed