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LY3305677

Phase 2

Obesity | Small molecule | Metabolic |Eli Lilly and Company|Last Updated: May 14, 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
RandomizedDouble-BlindCONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment1,481
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT06143956A Master Protocol Study (LY900038) of Multiple Intervention-Specific-Appendices (ISAs) in Adult Participants With Obesity or OverweightPHASE2 RECRUITING 1,481Nov 17, 2023Feb 1, 2028May 14, 202653 United States, Argentina
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Study Endpoints
Primary Endpoints
Number of Participants Allocated to Each ISA
Baseline to Week 6

Each ISA will detail the intervention specific analysis.

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Study Design & Arms
AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposeSCREENING
Treatment Arms
ArmTypeDescription
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.
Interventions
NameTypeDescription
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.
PlaceboDRUGAdministered SC. ISA specific interventions will be listed in the ISA.
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Eligibility Criteria
Age Range18 Years — 75 Years
SexALL
Healthy VolunteersNo
Study Sites53

Inclusion Criteria: * Have a body mass index (BMI) * ≥30 kilogram/square meter (kg/m²), or * ≥27 kg/m² and \<30 kg/m², or with at least 1 weight-related comorbidity * Have had a stable body weight for the 3 months prior to randomization (\<5%) body weight gain and/or loss. Exclusion Criteria:...

Countries:United StatesArgentina
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Recent Changes (Last 90 Days)
MEDIUMMay 26, 2026NCT06143956Enrollment: 1217 → 1481
LOWMay 24, 2026NCT06143956studyFirstPostDate: changed