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LY3938577

Phase 2

Type 2 Diabetes Mellitus | Small molecule | Metabolic |Eli Lilly and Company|Trials Updated: Oct 6, 2026

LY3938577 development status

Highest phase Phase 2
Registered trials 3 across 1 sponsor since Nov 2023

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindACTIVE_CONTROLLED
Total Trials3
Total Enrollment287

FDA Designations

No designations recorded

LY3938577 clinical trials

LY3938577 · 3 trials · 4 indications

Phase 2 1Phase 1 2
NCT07215312A Study of LY3938577 in Participants With Type 2 Diabetes Previously Treated With Basal InsulinDiabetes Mellitus, Type 2
ACTIVE NOT_RECRUITING100 Analytics
PHASE2ACTIVE NOT_RECRUITING
A Study of LY3938577 in Participants With Type 2 Diabetes Previously Treated With Basal Insulin
Diabetes Mellitus, Type 2Unlock trial analytics

Study Endpoints

Primary Endpoints

Change from Baseline in Glucose Time in Range Between 70 and 180 mg/dL Inclusive (Non-Inferiority Analysis)
Baseline through Week 20
Part A: Number of participants with one or more Adverse Event (s) (AEs), and Serious Adverse Event(s) (SAEs) considered by the investigator to be related to study drug administration.
Baseline up to Approximately Week 11

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

Part B and D: Number of participants with one or more Adverse Event (s) (AEs), and Serious Adverse Event(s) (SAEs) considered by the investigator to be related to study drug administration.
Baseline up to Week 10

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

Part A: Number of Participants With Clinically Significant Changes in Vital Signs
Baseline up to Approximately Week 11
Part B: Number of Participants With Clinically Significant Changes in Vital Signs
Baseline up to Week 10
Part A: Number of Participants With Clinically Significant Changes in Safety Laboratory Parameters
Baseline up to Approximately Week 11
Part B: Number of Participants With Clinically Significant Changes in Safety Laboratory Parameters
Baseline up to Week 10
Part A: Pharmacokinetics (PK): Area Under the Concentration Versus Time Curve (AUC) of LY3938577
Predose on day 1 up to week 13 post dose

PK: AUC of LY3938577 for intravenous administration

Part B: Pharmacokinetics (PK): Area Under the Concentration Versus Time Curve (AUC) of LY3938577
Predose on day 1 up to week 13 post dose

PK: AUC of LY3938577

Part C: Pharmacokinetics (PK): Area Under the Concentration Versus Time Curve (AUC) of LY3938577
Predose on day 1 up to week 13 post dose

PK: AUC of LY3938577 for SC administration

Part D: Pharmacokinetics (PK): Area Under the Concentration Versus Time Curve (AUC) of LY3938577
Predose on day 1 up to week 13 post dose

PK: AUC of LY3938577 for SC administration

Part A: PK: Maximum Observed Concentration (Cmax) of LY3938577
Predose on day 1 up to week 13 post dose

PK: Cmax of LY3938577

Part B: PK: Maximum Observed Concentration (Cmax) of LY3938577
Predose on day 1 up to week 13 post dose

PK: Cmax of LY3938577

Part C: PK: Concentration of LY3938577
Predose on day 1 up to week 13 post dose
Part A: Number of participants with one or more Adverse Event (s) (AEs), and Serious Adverse Event(s) (SAEs) considered by the investigator to be related to study drug administration
Baseline up to 16 days

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

Part B: Number of participants with one or more Adverse Event (s) (AEs), and Serious Adverse Event(s) (SAEs) considered by the investigator to be related to study drug administration
Baseline up to 44 days

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

Part A: Incidence of Hypoglycemia
Baseline up to 16 days
Part B: Incidence of Hypoglycemia
Baseline up to 44 days

Secondary Endpoints

Change from Baseline in Glucose Time in Range Between 70 and 180 mg/dL Inclusive (Superiority Analysis)
Baseline through Week 20
Change from Baseline in Hemoglobin A1c (HbA1c)
Baseline, Week 20
Pharmacokinetics (PK): Average Concentration of LY3938577
Baseline through Week 20
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
LY3938577EXPERIMENTALParticipants will receive LY3938577 subcutaneously (SC)
DegludecACTIVE_COMPARATORParticipants will receive degludec SC
Part A Period 1: LY3938577EXPERIMENTALSingle dose of LY3938577 administered intravenously (IV) in healthy participants.
Part A Period 1: PlaceboPLACEBO_COMPARATORSingle dose of Placebo administered intravenously (IV) in healthy participants.
Part B: LY3938577EXPERIMENTALFor each euglycemic and hyperglycemic clamps participants with T1DM will receive single doses of LY3938577 administered intravenously with Insulin Lispro administered at a constant low rate to cover individual participant's basal (fasting) insulin demand to maintain a stable glucose level.
Part B: Insulin DegludecACTIVE_COMPARATORFor each euglycemic and hyperglycemic clamps participants with T1DM will receive single doses of Insulin Degludec administered intravenously with Insulin Lispro administered at a constant low rate to cover individual participant's basal (fasting) insulin demand to maintain a stable glucose level.
Part C: LY3938577EXPERIMENTALLY3938577 administered subcutaneously (SC)
Part C: Insulin DegludecACTIVE_COMPARATORInsulin Degludec administered subcutaneously (SC)
Part A Period 2: LY3938577EXPERIMENTALSequential dose of LY3938577 administered subcutaneously (SC).
Part A Period 2: PlaceboPLACEBO_COMPARATORSequential dose of Placebo administered subcutaneously (SC)
Part D Period 1: Basal Insulin and Lispro Prandial InsulinOTHERPre-study basal insulin (provided by patient) and lispro prandial insulin administered SC
Part D Period 2: Lispro Prandial Insulin and LY3938577EXPERIMENTALLispro prandial insulin and LY3938577 administered SC
LY3938577 (Part A)EXPERIMENTALLY3938577 administered Subcutaneously (SC).
Placebo (Part A)PLACEBO_COMPARATORPlacebo administered SC.
Insulin degludec (Part A)ACTIVE_COMPARATORInsulin degludec administered SC.
LY3938577 (Part B)EXPERIMENTALLY3938577 administered SC.
Insulin degludec (Part B)ACTIVE_COMPARATORInsulin degludec administered SC.

Interventions

NameTypeDescription
LY3938577DRUGAdministered SC
DegludecDRUGAdministered SC
PlaceboDRUGAdministered Intravenously (IV)
Insulin DegludecDRUGAdministered Intravenously (IV)
Insulin LisproDRUGAdministered Intravenously (IV)
Basal InsulinDRUGAdministered subcutaneously (SC)
Lispro Prandial InsulinDRUGAdministered subcutaneously (SC)
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Eligibility Criteria

Age Range18 Years to 70 Years
SexALL
Healthy VolunteersNo
Study Sites26

Inclusion Criteria: * Have type 2 diabetes * Are receiving ≥20 units of basal insulin per day and ≤55 units/day and ≤1.5 units/kg/day at screening * Have hemoglobin A1c (HbA1c) 7.5% to 10.5% inclusive * Have a body mass index (BMI) of 20 or higher and less than 35 kilograms per square meter (kg/m2)...

Countries:United StatesArgentinaGermany
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Recent Changes (Last 90 Days)

HIGHOct 6, 2026NCT06280703Status: RECRUITING → COMPLETED
HIGHOct 6, 2026NCT06280703Status: RECRUITING → COMPLETED

Frequently asked questions about LY3938577

What is LY3938577?

LY3938577 is an investigational small molecule being developed by Eli Lilly and Company for metabolic conditions, specifically Type 1 Diabetes Mellitus and Type 2 Diabetes Mellitus. It is not yet approved and remains in clinical development. It is being studied in placebo-controlled, randomized, double-blind trials.

What is LY3938577 used for in diabetes?

LY3938577 is being studied for the treatment of Type 1 Diabetes Mellitus and Type 2 Diabetes Mellitus. It is an investigational therapy and has not been approved for any indication. Clinical trials are evaluating its safety and tolerability in adults with these conditions.

Who is developing LY3938577?

LY3938577 is being developed by Eli Lilly and Company, which trades under the ticker symbol LLY. Lilly is the sponsor of the clinical trials evaluating the drug in Type 1 and Type 2 Diabetes Mellitus.

What phase is LY3938577 in?

LY3938577 is in Phase 1 clinical development, with one Phase 2 trial also listed. It is investigational and has not been approved by the FDA or any regulatory agency. The Phase 1 trials have been completed, and a Phase 2 trial is active but not recruiting.

What clinical trials is LY3938577 in?

LY3938577 has been studied in three clinical trials. NCT06280703 was a completed Phase 1 trial in healthy participants and those with Type 1 Diabetes in Germany. NCT06132126 was a completed Phase 1 trial in healthy participants and those with Type 2 Diabetes in the United States. NCT07215312 is an active Phase 2 trial in participants with Type 2 Diabetes previously treated with basal insulin, conducted in the United States and Argentina.