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LY3522348

Phase 1

Healthy | Small molecule | Other |Eli Lilly and Company|Last Updated: Nov 4, 2025

Success Probability

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials1
Total Enrollment65

FDA Designations

No designations recorded

Clinical trial landscape

LY3522348 · 1 trial · 1 indication

Phase 1 1
NCT04559568A Study of LY3522348 in Healthy ParticipantsHealthy
COMPLETED65 Analytics
PHASE1COMPLETED
A Study of LY3522348 in Healthy Participants
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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
Part A: Baseline up to Day 14; Part B: Baseline up to Day 28

An SAE is any untoward medical occurrence temporally associated with the use of study intervention that results in death is life-threatening, requires inpatient hospitalization or prolongation of existing hospitalization, results in persistent disability/incapacity, is a congenital anomaly/birth defect or any other situation as determined by investigator. The number of participants with one or more SAEs considered by the investigator to be related to study drug administration is reported here. A summary of SAEs and other non-serious adverse events, regardless of causality, will be reported in the Reported Adverse Events module.

Secondary Endpoints

Part A Pharmacokinetics (PK): Area Under the Concentration Versus Time Curve From Time Zero to the Last Time Point With a Measurable Concentration (AUC(0-tlast)) of LY3522348
Day 1 (Predose, 0.75, 1.5, 3, 4, 6, 8, 10, 12, 16, 24, 48, 72, 96, 144 hours post Day 1 dose)
Part B PK: Area Under the Concentration Versus Time Curve From Time Zero to the Last Time Point With a Measurable Concentration (AUC(0-tlast)) of LY3522348
Day 1 (Predose, 0.75, 1.5, 3, 4, 6, 8, 12, 16, 24 hours post Day 1 dose); Day 14 (Predose, 0.75, 1.5, 3, 4, 6, 8, 12, 16, 24, 48, 72, 96, 144 hours post Day 14 dose)
Part A PK: Maximum Observed Drug Concentration (Cmax) of LY3522348
Day 1 (Predose, 0.75, 1.5, 3, 4, 6, 8, 10, 12, 16, 24, 48, 72, 96, 144 hours post Day 1 dose)
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Study Design & Arms

AllocationRANDOMIZED
MaskingDOUBLE
ModelSEQUENTIAL
PurposeBASIC_SCIENCE

Treatment Arms

ArmTypeDescription
Part A: PlaceboPLACEBO_COMPARATORA single dose of Placebo administered orally on Day 1.
Part A: 5 milligrams (mg) LY3522348EXPERIMENTALA single dose of 5 mg LY3522348 administered orally on Day 1.
Part A: 15 mg LY3522348EXPERIMENTALA single dose of 15 mg LY3522348 administered orally on Day 1.
Part A: 50 mg LY3522348EXPERIMENTALA single dose of 50 mg LY3522348 administered orally on Day 1.
Part A: 150 mg LY3522348EXPERIMENTALA single dose of 150 mg LY3522348 administered orally on Day 1.
Part A: 380 mg LY3522348EXPERIMENTALA single dose of 380 mg LY3522348 administered orally on Day 1.
Part B: PlaceboPLACEBO_COMPARATORPlacebo administered orally once daily on Days 1-14.
Part B: Placebo + MidazolamEXPERIMENTALPlacebo administered orally once daily on Days 1-15 and a single dose of 200 micrograms (μg) Midazolam administered orally on Days -1 and 15.
Part B: 50 mg LY3522348EXPERIMENTAL50 mg LY3522348 administered orally once daily on Days 1-14.
Part B: 120 mg LY3522348EXPERIMENTAL120 mg LY3522348 administered orally once daily on Days 1-14.
Part B: 290 mg LY3522348 + MidazolamEXPERIMENTAL290 mg LY3522348 administered orally once daily on Days 1-15 and a single dose of 200 μg Midazolam administered orally on Days -1 and 15.

Interventions

NameTypeDescription
LY3522348DRUGAdministered orally.
PlaceboDRUGAdministered orally.
MidazolamDRUGAdministered orally.
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Eligibility Criteria

Age Range18 Years to 65 Years
SexALL
Healthy VolunteersYes
Study Sites1

Inclusion Criteria: * Are overtly healthy as determined through medical evaluation including medical history and physical examination * Have a body mass index of greater than or equal to (≥)18.5 and less than or equal to (≤)40 kilograms per square meter (kg/m²) * Have had a stable weight for one mo...

Countries:United States
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Frequently asked questions about LY3522348

What is LY3522348?

LY3522348 is an investigational small molecule being developed by Eli Lilly and Company. It is currently in Phase 1 clinical development. The drug has been studied in healthy participants, and its therapeutic area is classified as Other. It is not approved and remains in clinical trials.

What is LY3522348 used for?

LY3522348 is being studied for use in healthy participants. The Phase 1 trial, NCT04559568, enrolled healthy volunteers to evaluate the drug. The indication is listed as Healthy, meaning the study is not targeting a specific disease. The drug is still in early clinical development.

Who makes LY3522348?

LY3522348 is developed by Eli Lilly and Company, a pharmaceutical company traded on the stock exchange under the ticker LLY. The company is conducting clinical trials to evaluate this investigational small molecule in healthy participants.

What phase is LY3522348 in?

LY3522348 is in Phase 1 clinical development. The only trial, NCT04559568, is a Phase 1 study that has been completed. The drug is investigational and has not been approved by regulatory authorities. It is still in the early stages of clinical testing.

What clinical trials is LY3522348 in?

LY3522348 has one completed clinical trial, NCT04559568, titled "A Study of LY3522348 in Healthy Participants." This Phase 1 study enrolled 65 participants in the United States. The trial was randomized, double-blind, and placebo-controlled, and it included healthy volunteers aged 18 years and older.