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Brenipatide

Phase 3

Depressive Disorder, Major | Small molecule | Psychiatry |Eli Lilly and Company|Trials Updated: Oct 22, 2026

Brenipatide development status

Highest phase Phase 3
Registered trials 18 across 1 sponsor since Dec 2020

Brenipatide target and mechanism

Target class-Tide (Peptide)
ModalitySmall molecule

Also known as LY3537031

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials15
Total Enrollment8,230

FDA Designations

No designations recorded

Brenipatide clinical trials

Brenipatide · 15 trials · 17 indications

Phase 3 4Phase 2 8Phase 1 3
NCT07775300A Study of Brenipatide (LY3537031) in Adult Participants With Major Depressive DisorderDepressive Disorder, Major
RECRUITING1,000 Analytics
NCT07412756A Study of Brenipatide in Adult Participants With Major Depressive DisorderDepressive Disorder, Major
RECRUITING1,000 Analytics
NCT07219953A Study of Brenipatide in Participants With Alcohol Use DisorderAlcohol Use Disorder
RECRUITING1,100 Analytics
NCT07219966A Study of Brenipatide in Participants With Moderate-to-Severe Alcohol Use DisorderAlcohol Use Disorder
RECRUITING1,100 Analytics
PHASE3RECRUITING
A Study of Brenipatide (LY3537031) in Adult Participants With Major Depressive Disorder
Depressive Disorder, MajorUnlock trial analytics
PHASE3RECRUITING
A Study of Brenipatide in Adult Participants With Major Depressive Disorder
Depressive Disorder, MajorUnlock trial analytics
PHASE3RECRUITING
A Study of Brenipatide in Participants With Alcohol Use Disorder
Alcohol Use DisorderUnlock trial analytics
PHASE3RECRUITING
A Study of Brenipatide in Participants With Moderate-to-Severe Alcohol Use Disorder
Alcohol Use DisorderUnlock trial analytics

Study Endpoints

Primary Endpoints

Time to Relapse Defined as the Number of Days from Randomization to Date on Which the Participant Meets Any Relapse Criterion of Major Depressive Disorder (MDD)
From Randomization in Double-Blind Adjunctive Treatment to First Relapse For at Least 12 Months
Change in Drinking Patterns in Alcohol Use Disorder (AUD) as Assessed by the Timeline Followback Method (TLFB)
Up to 56 weeks
Change from Baseline in Pre-Bronchodilator (BD) Forced Expiratory Volume in 1 Second (FEV₁)
Baseline through Week 36
Percentage of Participants Who Had a Daily Composite Response for at Least 50 Percent (%) of Days
Week 9 to Week 16
Percentage of Participants with a Weekly Composite Clinical Response for at Least 50 Percent (%) of Weeks
Week 9 to 16
Percentage of Weeks of Abstinence from Opioid Use Defined by Both Negative Urine Drug Screen (UDS) and no Self-Report of Opioid use Based on Timeline Followback (TLFB)
Week 13 up to Week 24
Achievement of ≥80% Weeks of Abstinence from Opioid Use Defined by Both Negative UDS and no Self-Report of Opioid Use Based on TLFB
Week 13 up to Week 24
Percent Change from Baseline in Body Weight in Participants with a Baseline Body Mass Index ≥25.0 Kilograms per Meter Squared (kg/m²)
Baseline, Week 52
Time to Relapse Defined as Days from Randomization to the Date on Which the Participant Meets Any Relapse Criterion
Randomization up to at least 6 months
Percentage of Participants that Achieve Carbon Monoxide (CO)-Confirmed Continuous Abstinence from Cigarette Smoking with Allowed Slips
Week 1 to Week 24
Annualized Asthma Exacerbation Rate Over 52 Weeks of Treatment
Baseline to Week 52

To assess the asthma exacerbation rate.

Percent Change in Body Weight
Week 1, Week 29
Pharmacokinetics (PK): Area Under the Concentration Versus Time Curve (AUC) of LY3537031
Predose on day 1 up to week 8 post dose

PK: AUC of LY3537031

PK: Maximum Concentration (Cmax) of LY3537031
Predose on day 1 up to week 8 post dose

PK: Cmax of LY3537031

Number of Participants with One or More Treatment Emergent Adverse Events (TEAEs), Serious Adverse Event(s) (SAEs), and Adverse Event(s) (AEs) Considered by the Investigator to be Related to Study Drug Administration
Baseline to Study Completion (Up to 56 Weeks)

A summary of TEAEs, SAEs, and AEs regardless of causality, will be reported in the Reported Adverse Events module

Secondary Endpoints

Mean Percent Change from Baseline in Body Weight in Participants with a Baseline Body Mass Index (BMI) ≥ 25.0 kg/m^2
Baseline, up to at least 6 months
Change from Baseline in Montgomery-Åsberg Depression Rating Scale (MADRS) Total Score
Baseline, up to at least 6 months
Change from Baseline in Sheehan Disability Scale (SDS) Global Functional Impairment Score
Baseline, up to at least 6 months
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Study Design & Arms

AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Brenipatide Dose 1EXPERIMENTALBrenipatide administered subcutaneous (SC) + standard of care (SoC).
Brenipatide Dose 2EXPERIMENTALBrenipatide administered SC + SoC.
Brenipatide Dose 3EXPERIMENTALBrenipatide administered SC + SoC.
PlaceboPLACEBO_COMPARATORPlacebo administered SC + SoC.
LY3537031 Period 1EXPERIMENTALEscalating doses administered subcutaneously (SC)
LY3537031 Period 2EXPERIMENTALAdministered SC
LY3537031EXPERIMENTALLY3537031 administered subcutaneously (SC)
Part A and Part B: Brenipatide + Buprenorphine Dose 1EXPERIMENTALPart A: Brenipatide administered subcutaneously (SC) + Buprenorphine administered sublingual or buccal. Part B: Open-label Treatment: Participants will receive Brenipatide SC + Buprenorphine sublingual or buccal.
Part A: Brenipatide + Buprenorphine Dose 2EXPERIMENTALBrenipatide administered SC + Buprenorphine administered sublingual or buccal.
Part A: Brenipatide + Buprenorphine Dose 3EXPERIMENTALBrenipatide administered SC + Buprenorphine administered sublingual or buccal.
Part A: Placebo + BuprenorphinePLACEBO_COMPARATORPlacebo administered SC + Buprenorphine administered sublingual or buccal.
BrenipatideEXPERIMENTALBrenipatide administered subcutaneously (SC) + SoC.
Brenipatide Dose 2 .EXPERIMENTALBrenipatide administered subcutaneous (SC) + SoC.
LY3537031 (Group 1)EXPERIMENTALLY3537031 administered subcutaneously (SC) in a control group of participants with normal renal function
LY3537031 (Groups 2-3)EXPERIMENTALLY3537031 administered SC in groups of participants with impaired renal function
LY3537031 (Group 3)EXPERIMENTALLY3537031 administered SC in a group of participants with end-stage renal disease (ESRD) on hemodialysis
LY3537031 Part A (Cohorts 1-7)EXPERIMENTALMultiple-ascending doses of LY3537031 administered subcutaneously (SC)
Placebo Part APLACEBO_COMPARATORPlacebo administered SC
LY3537031 Part B (Cohorts 8-11)EXPERIMENTALMultiple-ascending doses of LY3537031 administered SC
Placebo Part BPLACEBO_COMPARATORPlacebo administered SC
LY3537031 Part C (Cohorts 12-15)EXPERIMENTALMultiple-ascending doses of LY3537031 administered SC
Placebo Part CPLACEBO_COMPARATORPlacebo administered SC
LY3537031 Part D (Cohorts 16-19)EXPERIMENTALMultiple-ascending doses of LY3537031 administered SC
Placebo Part DPLACEBO_COMPARATORPlacebo administered SC

Interventions

NameTypeDescription
BrenipatideDRUGAdministered SC.
PlaceboDRUGAdministered SC.
LY3537031DRUGAdministered SC
Standard of CareDRUGSOC
BuprenorphineDRUGAdministered sublingual or buccal
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Eligibility Criteria

Age Range18 Years to 75 Years
SexALL
Healthy VolunteersNo
Study Sites170

Inclusion Criteria: * Meet the diagnostic criteria for major depressive disorder * Are on stable standard of care medication for major depressive disorder * Are reliable and willing to make themselves available for the duration of the study and attend required study visits, and are willing and able...

Countries:United StatesAustraliaBrazilCanadaChinaGermanyGreeceJapanMexicoPolandPuerto RicoSouth KoreaSpainTaiwanUnited KingdomBelgiumArgentinaAustriaCzechiaDenmarkFranceHungaryIndiaRomaniaNetherlandsNew Zealand
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Recent Changes (Last 90 Days)

LOWOct 22, 2026NCT07219173lastUpdatePostDate: changed
LOWOct 22, 2026NCT07219173lastUpdatePostDate: changed
LOWOct 8, 2026NCT07759245lastUpdatePostDate: changed
LOWOct 8, 2026NCT07545759lastUpdatePostDate: changed
LOWOct 8, 2026NCT07545772lastUpdatePostDate: changed
LOWOct 8, 2026NCT07219953lastUpdatePostDate: changed
LOWOct 8, 2026NCT07219173lastUpdatePostDate: changed
LOWOct 8, 2026NCT07759245lastUpdatePostDate: changed
LOWOct 8, 2026NCT07545759lastUpdatePostDate: changed
LOWOct 8, 2026NCT07545772lastUpdatePostDate: changed
LOWOct 8, 2026NCT07219173lastUpdatePostDate: changed
LOWOct 8, 2026NCT07219953lastUpdatePostDate: changed
LOWOct 7, 2026NCT07775300lastUpdatePostDate: changed
LOWOct 7, 2026NCT07410507lastUpdatePostDate: changed
LOWOct 7, 2026NCT07286175lastUpdatePostDate: changed
LOWOct 7, 2026NCT07219966lastUpdatePostDate: changed
LOWOct 7, 2026NCT07420283lastUpdatePostDate: changed
LOWOct 7, 2026NCT07775300lastUpdatePostDate: changed
LOWOct 7, 2026NCT07410507lastUpdatePostDate: changed
LOWOct 7, 2026NCT07219966lastUpdatePostDate: changed

Frequently asked questions about Brenipatide

What is Brenipatide?

Brenipatide is an investigational small molecule peptide developed by Eli Lilly and Company under the code LY3537031. It is being studied in clinical trials for several conditions, including major depressive disorder, chronic obstructive pulmonary disease, overweight or obesity, and opioid use disorder. It has not been approved by the FDA and remains in clinical development.

What is Brenipatide used for?

Brenipatide is being studied for major depressive disorder, moderate-to-severe chronic obstructive pulmonary disease, overweight or obesity, and opioid use disorder. Additional listed indications include asthma and bipolar disorder. It is investigational, so it is not approved for any use, and all current use is within clinical trials.

Who makes Brenipatide?

Brenipatide is developed by Eli Lilly and Company, which trades on the New York Stock Exchange under the ticker LLY. Lilly is running the clinical program, including a Phase 3 trial in major depressive disorder and Phase 2 trials in COPD and opioid use disorder.

What phase is Brenipatide in?

Brenipatide is in Phase 2 development overall, with one Phase 3 trial and one Phase 1 trial also listed. The Phase 3 study in major depressive disorder is recruiting, and the Phase 2 COPD and opioid use disorder studies are recruiting. Brenipatide is investigational and has not been approved by the FDA.

What clinical trials is Brenipatide in?

Brenipatide trials include NCT07775300, a Phase 3 study in major depressive disorder enrolling about 1,000 adults, and NCT07759245, a Phase 2 COPD study enrolling about 606 adults. NCT07420283 is a Phase 2 opioid use disorder study, and NCT07476118 is a Phase 1 study in overweight or obesity.

Is Brenipatide the same as LY3537031?

Yes, Brenipatide is also known as LY3537031. Eli Lilly and Company uses LY3537031 as the internal code for the same investigational peptide, and both names appear in trial titles such as the Phase 3 major depressive disorder study and the Phase 2 COPD study.