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LY3305677

Phase 2

Obesity | Small molecule | Metabolic |Eli Lilly and Company|Last Updated: Aug 6, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindCONTROLLEDDMC
Total Trials1
Total Enrollment1,481

FDA Designations

No designations recorded

Clinical trial landscape

LY3305677 · 5 trials · 4 indications

Phase 2 1Phase 1 4
NCT06143956A Master Protocol Study (LY900038) of Multiple Intervention-Specific-Appendices (ISAs) in Adult Participants With Obesity or OverweightObesity
RECRUITING1,481 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

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

Number of Participants with One or More Serious Adverse Event(s) (SAEs) Considered by the Investigator to be Related to Study Drug Administration
Baseline through 115 days

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

Pharmacokinetics (PK): Maximum Concentration (Cmax) of LY3305677
Predose up to 72 hours postdose
PK: Area Under the Concentration Versus Time Curve (AUC) of LY3305677
Predose up to 72 hours postdose
Pharmacodynamics (PD): Percentage change in Body Weight
Baseline through Week 20
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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.
LY3305677EXPERIMENTALLY3305677 administered subcutaneously (SC)
PlaceboPLACEBO_COMPARATORPlacebo administered SC

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 to 75 Years
SexALL
Healthy VolunteersNo
Study Sites54

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 StatesArgentinaGermanyUnited Kingdom
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Recent Changes (Last 90 Days)

LOWAug 6, 2026NCT06143956lastUpdatePostDate: changed
LOWAug 6, 2026NCT06143956lastUpdatePostDate: changed
LOWJul 20, 2026NCT06143956lastUpdatePostDate: changed
LOWJul 20, 2026NCT06143956lastUpdatePostDate: changed
LOWJul 7, 2026NCT06143956lastUpdatePostDate: changed
LOWJul 7, 2026NCT06143956lastUpdatePostDate: changed
LOWJun 23, 2026NCT06143956lastUpdatePostDate: changed
LOWJun 23, 2026NCT06143956lastUpdatePostDate: changed

Frequently asked questions about LY3305677

What is LY3305677 used for?

LY3305677 is an investigational small molecule being developed by Eli Lilly and Company for metabolic conditions, including obesity, overweight, and type 2 diabetes. It is currently in Phase 1 clinical development and has not been approved by regulatory authorities.

What does LY3305677 target?

LY3305677 is a small molecule, but its specific molecular target has not been disclosed in available clinical trial information. It is being studied for its effects on metabolic conditions such as obesity and type 2 diabetes.

Who makes LY3305677?

LY3305677 is being developed by Eli Lilly and Company, a pharmaceutical company listed on the New York Stock Exchange under the ticker symbol LLY. The company is conducting clinical trials to evaluate the drug's safety and efficacy.

What phase is LY3305677 in?

LY3305677 is in Phase 1 clinical development. It has completed multiple Phase 1 trials in healthy participants and in patients with type 2 diabetes, and is currently being evaluated in a Phase 2 master protocol study for obesity or overweight.

What clinical trials is LY3305677 in?

LY3305677 has been studied in several clinical trials, including NCT03325387 in healthy participants, NCT03928379 in type 2 diabetes, and NCT05623839 in obesity or overweight. It is currently being evaluated in the Phase 2 master protocol study NCT06143956.

Is LY3305677 the same as LY900038?

LY3305677 is not the same as LY900038. LY900038 is the master protocol study number for a Phase 2 trial that evaluates multiple investigational drugs, including LY3305677, in participants with obesity or overweight.