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Mazdutide

Phase 4

Alcohol Use Disorder | Small molecule | Psychiatry |Eli Lilly and Company|Trials Updated: Oct 7, 2026

Mazdutide development status

Highest phase Phase 4 run by China National Center for Cardiovascular Diseases (NCT07657676)
Phase scored for LLYPhase 2
Registered trials 9 across 3 sponsors since Nov 2016

Mazdutide target and mechanism

Target class-Tide (Peptide)
ModalitySmall molecule

Also known as LY3305677

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials5
Total Enrollment2,024

FDA Designations

No designations recorded

Mazdutide clinical trials

Mazdutide · 5 trials · 5 indications

Phase 2 3Phase 1 2
NCT06817356A Study to Evaluate Mazdutide Compared With Placebo in Participants With Alcohol Use DisorderAlcohol Use Disorder
COMPLETED308 Analytics
NCT06124807A Study of LY3305677 Compared With Placebo in Adult Participants With Obesity or OverweightObesity
COMPLETED179 Analytics
NCT06143956A Master Protocol Study (LY900038) of Multiple Intervention-Specific-Appendices (ISAs) in Adult Participants With Obesity or OverweightObesity
RECRUITING1,481 Analytics
PHASE2COMPLETED
A Study to Evaluate Mazdutide Compared With Placebo in Participants With Alcohol Use Disorder
Alcohol Use DisorderUnlock trial analytics
PHASE2COMPLETED
A Study of LY3305677 Compared With Placebo in Adult Participants With Obesity or Overweight
ObesityUnlock trial analytics
PHASE2RECRUITING
A Master Protocol Study (LY900038) of Multiple Intervention-Specific-Appendices (ISAs) in Adult Participants With Obesity or Overweight
ObesityUnlock trial analytics

Study Endpoints

Primary Endpoints

Behaviors Associated with Alcohol Use Disorder (AUD) as Assessed by the Timeline Followback Method
Baseline, Week 28
Percent Change From Baseline in Body Weight at Week 32
Baseline, Week 32

Least squares means were calculated using an MMRM model for post-baseline measures: Variable = Baseline\*Time + Strata\*Time + Treatment\*Time, where Treatment and Strata are factors. Variance-Covariance structure (Percent Change from Baseline) = Unstructured. Strata is defined by joint levels of Sex and Baseline BMI (\<=30, \>30 kg/m\^2).

Number of Participants Allocated to Each ISA
Baseline to Week 6

Each ISA will detail the intervention specific analysis.

Number of Participants with One or More Treatment Emergent Adverse Events (TEAEs) and Serious Adverse Event(s) (SAEs) Considered by the Investigator to be Related to Study Drug Administration
Baseline through Week 20

A summary of TEAEs, SAEs and other non-serious adverse events (AEs), regardless of causality, will be reported in the Reported Adverse Events module

Number of Participants with One or More Serious Adverse Event(s) (SAEs) Considered by the Investigator to be Related to Study Drug
Baseline through 24 weeks

A summary of SAEs and other non-serious adverse events (AEs), regardless of causality, will be reported in the Reported Adverse Events module

Secondary Endpoints

Percent Change From Baseline in Body Weight at Week 48
Baseline, Week 48
Change From Baseline in Body Weight
Baseline, Week 32, Week 48
Mean Percentage of Participants Who Achieve ≥5% Body Weight Reduction
Baseline, Week 32, Week 48
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Study Design & Arms

AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposeOTHER

Treatment Arms

ArmTypeDescription
MazdutideEXPERIMENTALMazdutide administered subcutaneously (SC).
PlaceboPLACEBO_COMPARATORPlacebo administered SC.
3/6 Milligrams (mg) MazdutideEXPERIMENTALParticipants received once-weekly subcutaneous Mazdutide with dose escalation until the target dose (3 or 6 mg) was achieved, starting at 1.5 mg from Weeks 0-3, followed by 3 mg from Weeks 4-31, then 6 mg from Weeks 32-48.
10 mg MazdutideEXPERIMENTALParticipants received once-weekly subcutaneous Mazdutide with dose escalation until the target dose (10 mg) was achieved, starting at 1.5 mg from Weeks 0-3, followed by 3 mg from Weeks 4-7, 6 mg from Weeks 8-11, 8 mg from Weeks 12-15, and then 10 mg from Weeks 16-48.
16 mg MazdutideEXPERIMENTALParticipants received once-weekly subcutaneous Mazdutide with dose escalation until the target dose (16 mg) was achieved, starting at 1.5 mg from Weeks 0-3, followed by 3 mg from Weeks 4-7, 6 mg from Weeks 8-11, 9 mg from Weeks 12-15, 12 mg from Weeks 16-19, and then16 mg from Weeks 20-48.
LY3305677 Obesity ISA OXA1EXPERIMENTALParticipants will receive LY3305677 or placebo subcutaneously (SC). Each ISA will detail the intervention specific analysis.
LY3841136 Obesity ISA LAA1EXPERIMENTALParticipants will receive LY3841136 or placebo SC. Each ISA will detail the intervention specific analysis.
LY3841136 Obesity ISA LAA2EXPERIMENTALParticipants will receive LY3841136, tirzepatide and placebo SC. Each ISA will detail the intervention specific analysis.
LY3549492 Obesity ISA GN01EXPERIMENTALParticipants will receive LY3549492 or placebo orally. Each ISA will detail the intervention specific analysis.
LY3549492 Obesity ISA GN02EXPERIMENTALParticipants will receive LY3549492 or placebo orally. Each ISA will detail the intervention specific analysis.
Obesity ISA MC01EXPERIMENTALParticipants will receive macupatide, eloralintide, and placebo SC. Each ISA will detail the intervention specific analysis.
LY3305677EXPERIMENTALLY3305677 administered subcutaneously (SC)

Interventions

NameTypeDescription
MazdutideDRUGAdministered SC
PlaceboDRUGAdministered SC
LY3305677DRUGAdministered SC. ISA specific interventions will be listed in the ISA.
LY3841136DRUGAdministered SC. ISA specific interventions will be listed in the ISA.
TirzepatideDRUGAdministered SC. ISA specific interventions will be listed in the ISA.
LY3549492DRUGAdministered orally. ISA specific interventions will be listed in the ISA.
LY3532226DRUGAdministered SC. ISA specific interventions will be listed in the ISA.
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Eligibility Criteria

Age Range21 Years to 65 Years
SexALL
Healthy VolunteersNo
Study Sites25

Inclusion Criteria: * Current AUD diagnosis as defined by Diagnostic and Statistical Manual of Mental Disorders (DSM)-5 criteria. Exclusion Criteria: * Have a history of significant active or unstable major depressive disorder, suicidal ideation, or other severe psychiatric disorder within the la...

Countries:United StatesArgentinaGermany
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Recent Changes (Last 90 Days)

LOWOct 7, 2026NCT06143956lastUpdatePostDate: changed
LOWOct 7, 2026NCT06143956lastUpdatePostDate: changed
LOWSep 8, 2026NCT06143956lastUpdatePostDate: changed
LOWSep 8, 2026NCT06143956lastUpdatePostDate: changed
MEDIUMAug 16, 2026NCT06817356TRIAL_REMOVED: changed
MEDIUMAug 16, 2026NCT06817356TRIAL_REMOVED: changed
MEDIUMAug 16, 2026NCT06817356TRIAL_REMOVED: changed
MEDIUMAug 16, 2026NCT06817356TRIAL_REMOVED: changed
LOWAug 6, 2026NCT06143956lastUpdatePostDate: changed
LOWAug 6, 2026NCT06143956lastUpdatePostDate: changed

Frequently asked questions about Mazdutide

What is mazdutide?

Mazdutide is an investigational small molecule being developed by Eli Lilly and Company for Alcohol Use Disorder and Obesity. It is in Phase 2 clinical development. The drug has been studied in randomized, double-blind, placebo-controlled trials, including one trial in Alcohol Use Disorder and one in Obesity or Overweight.

What is mazdutide used for?

Mazdutide is being studied for the treatment of Alcohol Use Disorder and for Obesity or Overweight. It is not approved for any indication and remains in Phase 2 clinical development. The completed Phase 2 trial in Alcohol Use Disorder enrolled 308 participants, and the completed Phase 2 trial in Obesity or Overweight enrolled 179 participants.

Who makes mazdutide?

Mazdutide is being developed by Eli Lilly and Company, which trades on the New York Stock Exchange under the ticker LLY. The company is the sponsor of the Phase 2 clinical trials evaluating mazdutide in Alcohol Use Disorder and in Obesity or Overweight.

What phase is mazdutide in?

Mazdutide is in Phase 2 clinical development. Both completed trials were Phase 2 studies: one in Alcohol Use Disorder and one in Obesity or Overweight. The drug is investigational and has not been approved by the FDA for any indication.

What clinical trials is mazdutide in?

Mazdutide has been evaluated in two completed Phase 2 trials. NCT06817356 compared mazdutide with placebo in 308 participants with Alcohol Use Disorder in the United States. NCT06124807 studied LY3305677 compared with placebo in 179 adults with Obesity or Overweight in the United States. Both trials were randomized, double-blind, and placebo-controlled.

Is mazdutide the same as LY3305677?

Yes, mazdutide is also known as LY3305677. The Phase 2 trial NCT06124807 in adults with Obesity or Overweight was conducted under the name LY3305677, while the Phase 2 trial NCT06817356 in Alcohol Use Disorder was conducted under the name mazdutide. Both refer to the same investigational drug developed by Eli Lilly and Company.