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LY3971297

Phase 1

Heart Failure | Small molecule | Cardiovascular |Eli Lilly and Company|Trials Updated: Sep 22, 2026

LY3971297 development status

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

Success Probability

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Market & Valuation

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Trial Design

RandomizedPLACEBO_CONTROLLED
Total Trials2
Total Enrollment290

FDA Designations

No designations recorded

LY3971297 clinical trials

LY3971297 · 2 trials · 6 indications

Phase 1 2
NCT07547540A Study of LY3971297 in Participants With Heart FailureHeart Failure
RECRUITING90 Analytics
NCT06148272A Study of LY3971297 in Healthy ParticipantsHealthy
COMPLETED200 Analytics
PHASE1RECRUITING
A Study of LY3971297 in Participants With Heart Failure
Heart FailureUnlock trial analytics
PHASE1COMPLETED
A Study of LY3971297 in Healthy Participants
HealthyUnlock trial analytics

Study Endpoints

Primary Endpoints

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 Study Completion (Approximately 2 Months)
Number of Participants with One or More Treatment-Emergent Adverse Event
Baseline through Study Completion (Approximately 2 Months)
Part A and F: 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 (Day of Exposure) to Day 29 post-dose

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

Part B, C, D, E, & G: 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 (Day of Exposure) to Day 57 post-dose

Part B, C, D, E, \& G: A summary of TEAEs and SAEs, regardless of causality, will be reported in the Reported Adverse Events module

Part F: Pharmacokinetics (PK): Area Under the Concentration curve (AUC) of LY3971297
Baseline Up to Day 29 post-dose for Part F

Part F: PK: AUC of LY3971297

Part F: PK: Maximum Observed Drug Concentration (Cmax) of LY3971297
Baseline Up to Day 29 post-dose for Part F

Part F: PK: Cmax of LY3971297

Secondary Endpoints

Pharmacokinetics (PK): Area Under the Concentration Versus Time Curve (AUC) of LY3971297
Predose on Day 1 up to Day 29 Post-Dose
PK: Maximum Concentration (Cmax) of LY3971297
Predose on Day 1 up to Day 29 Post-Dose
Part B, C, D, E, and G: Pharmacokinetics (PK): Area Under the Concentration curve (AUC) of LY3971297
Predose on day 1 up to 29 days post-dose for Part A and pre-dose on day 1 up to 57 days post-dose for Part B, C, D, E, and G
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Study Design & Arms

AllocationRANDOMIZED
MaskingSINGLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
LY3971297 Part A Cohort 1EXPERIMENTALLY3971297 administered subcutaneously (SC)
Placebo Part A Cohort 1PLACEBO_COMPARATORPlacebo administered SC
LY3971297 Part A Cohort 2EXPERIMENTALLY3971297 administered SC
Placebo Part A Cohort 2PLACEBO_COMPARATORPlacebo administered SC
LY3971297 Part A Cohort 3EXPERIMENTALLY3971297 administered SC
Placebo Part A Cohort 3PLACEBO_COMPARATORPlacebo administered SC
LY3971297 Part A Cohort 4EXPERIMENTALLY3971297 administered SC
Placebo Part A Cohort 4PLACEBO_COMPARATORPlacebo administered SC
LY3971297 Part A Cohort 5EXPERIMENTALLY3971297 administered intravenously (IV)
Placebo Part A Cohort 5PLACEBO_COMPARATORPlacebo administered IV
LY3971297 Part BEXPERIMENTALLY3971297 administered SC or IV
Placebo Part BPLACEBO_COMPARATORPlacebo administered SC or IV
LY3971297 (Part A)EXPERIMENTALSingle ascending doses of LY3971297 administered subcutaneously (SC) in healthy participants
LY3971297 (Part B)EXPERIMENTALMultiple ascending doses of LY3971297 administered SC in healthy participants
LY3971297 (Part C)EXPERIMENTALMultiple ascending doses of LY3971297 administered SC in healthy Chinese participants
LY3971297 (Part D)EXPERIMENTALMultiple ascending doses of LY3971297 administered SC
LY3971297 (Part E)EXPERIMENTALMultiple doses of LY3971297 administered SC in healthy Japanese participants
Placebo (Part A, B, C, D, E, & G)PLACEBO_COMPARATORPlacebo administered SC
LY3971297 (Part F)EXPERIMENTALSingle doses of LY3971297 administered intravenously (IV) in healthy participants
LY3971297 (Part G)EXPERIMENTALMultiple doses of LY3971297 administered SC

Interventions

NameTypeDescription
LY3971297DRUGAdministered SC
PlaceboDRUGAdministered SC
LY3971297 IVDRUGAdministered IV
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Eligibility Criteria

Age Range18 Years to 65 Years
SexALL
Healthy VolunteersNo
Study Sites11

Inclusion Criteria: * Are diagnosed with chronic heart failure with New York Heart Association Class II-III (Heart Failure) HF symptomatology at screening and on guideline-directed HF therapy for at least 6 months prior to screening. * Have not changed optimal guideline-directed HF therapy, either ...

Countries:United StatesJapanMoldovaRomaniaSingapore
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Recent Changes (Last 90 Days)

LOWSep 22, 2026NCT07547540lastUpdatePostDate: changed
LOWSep 22, 2026NCT07547540lastUpdatePostDate: changed
HIGHSep 21, 2026NCT06148272Status: ACTIVE_NOT_RECRUITING → COMPLETED
HIGHSep 21, 2026NCT06148272Status: ACTIVE_NOT_RECRUITING → COMPLETED
LOWAug 21, 2026NCT07547540Status: NOT_YET_RECRUITING → RECRUITING
LOWAug 21, 2026NCT07547540Status: NOT_YET_RECRUITING → RECRUITING
LOWAug 11, 2026NCT07547540lastUpdatePostDate: changed
LOWAug 11, 2026NCT07547540lastUpdatePostDate: changed
LOWAug 11, 2026NCT07547540lastUpdatePostDate: changed

Frequently asked questions about LY3971297

What is LY3971297?

LY3971297 is an investigational small molecule being developed by Eli Lilly and Company for heart failure and obesity. It is in Phase 1 clinical development and has not been approved by the FDA. Lilly is studying it in placebo-controlled trials, including one completed study in healthy participants and one recruiting study in people with heart failure.

What is LY3971297 used for?

LY3971297 is being studied for heart failure and for obesity. The recruiting Phase 1 trial enrolls adults with heart failure, including diastolic and systolic heart failure, while the completed Phase 1 trial enrolled healthy participants and people with obesity or hypertension. It is investigational and not approved for any use.

Who makes LY3971297?

LY3971297 is developed by Eli Lilly and Company, which trades on the New York Stock Exchange under the ticker LLY. Lilly is running the Phase 1 program for the small molecule in heart failure and obesity.

What phase is LY3971297 in?

LY3971297 is in Phase 1 clinical development. One Phase 1 trial in healthy participants has completed, and a second Phase 1 trial in participants with heart failure is currently recruiting. The drug is investigational and has not received FDA approval.

What clinical trials is LY3971297 in?

Two Phase 1 trials of LY3971297 are registered. NCT06148272 studied the drug in healthy participants, including people with obesity or hypertension, and has completed with 200 participants enrolled. NCT07547540 is a recruiting Phase 1 study in participants with heart failure, with planned enrollment of 90, running in the United States, Japan, Moldova, and Romania.

Is LY3971297 placebo controlled?

Yes. The LY3971297 Phase 1 program uses placebo-controlled designs. The completed healthy participant study and the recruiting heart failure study are both randomized and placebo controlled, though they are not double blinded. The heart failure trial, NCT07547540, is enrolling adults 18 years and older.