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Methadone+BEM/RZR

Phase 1

Healthy Volunteer Study | Small molecule | Other |Atea Pharmaceuticals, Inc.|Last Updated: Jul 16, 2026

Success Probability

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Market & Valuation

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Trial Design

CONTROLLED
Total Trials1
Total Enrollment32

FDA Designations

No designations recorded

Clinical trial landscape

Methadone+BEM/RZR · 1 trial · 1 indication

Phase 1 1
NCT07314346Drug-drug Interaction Study of Bemnifosbuvir/Ruzasvir (BEM/RZR) and Buprenorphine/Naloxone or MethadoneHealthy Volunteer Study
RECRUITING32 Analytics
PHASE1RECRUITING
Drug-drug Interaction Study of Bemnifosbuvir/Ruzasvir (BEM/RZR) and Buprenorphine/Naloxone or Methadone
Healthy Volunteer StudyUnlock trial analytics

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 to 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)

LOWJul 17, 2026NCT07314346primaryCompletionDate: changed
LOWJul 17, 2026NCT07314346primaryCompletionDate: changed
LOWJul 17, 2026NCT07314346primaryCompletionDate: changed

Frequently asked questions about Methadone+BEM/RZR

What is Methadone+BEM/RZR used for?

Methadone+BEM/RZR is an investigational combination being studied in a Phase 1 clinical trial for use in healthy volunteers. The study is a drug-drug interaction trial evaluating the combination of bemnifosbuvir/ruzasvir (BEM/RZR) with buprenorphine/naloxone or methadone. It is not approved for any indication and remains in clinical development.

Who makes Methadone+BEM/RZR?

Methadone+BEM/RZR is being developed by Atea Pharmaceuticals, Inc., a biopharmaceutical company traded on the stock exchange under the ticker symbol AVIR. The company is conducting a Phase 1 clinical trial to evaluate the drug-drug interaction between BEM/RZR and methadone or buprenorphine/naloxone in healthy volunteers.

What phase is Methadone+BEM/RZR in?

Methadone+BEM/RZR is in Phase 1 clinical development. The ongoing trial, NCT07314346, is a Phase 1 study that is currently recruiting participants. The drug is investigational and has not been approved by regulatory authorities for any use.

What clinical trials is Methadone+BEM/RZR in?

Methadone+BEM/RZR is being evaluated in one active Phase 1 clinical trial, NCT07314346, titled "Drug-drug Interaction Study of Bemnifosbuvir/Ruzasvir (BEM/RZR) and Buprenorphine/Naloxone or Methadone." The trial is recruiting 32 healthy volunteers in the United States and is not randomized or double-blind.

Is Methadone+BEM/RZR the same as Methadone +BEM/RZR?

Yes, Methadone+BEM/RZR is the same as Methadone +BEM/RZR. Both names refer to the combination of methadone with bemnifosbuvir/ruzasvir (BEM/RZR), which is being studied in a Phase 1 drug-drug interaction trial in healthy volunteers.