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A Study of Imlunestrant (LY3484356) in Female Participants With Impaired Liver Function

Pharmacokinetics of Imlunestrant in Participants With Hepatic Impairment

Status
Completed
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05440344
Enrollment
27
Registered
2022-06-30
Start date
2022-07-05
Completion date
2024-02-28
Last updated
2025-11-12

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Hepatic Insufficiency, Healthy

Brief summary

The main purpose of this study is to measure how much of Imlunestrant (LY3484356) gets into the bloodstream and how long it takes the body to eliminate it in female participants with impaired liver function compared to female participants with normal liver function. The side effects and tolerability of Imlunestrant will also be evaluated. The study may last up to 46 days for each participant.

Interventions

Administered orally.

Sponsors

Eli Lilly and Company
Lead SponsorINDUSTRY

Study design

Allocation
NON_RANDOMIZED
Intervention model
PARALLEL
Primary purpose
BASIC_SCIENCE
Masking
NONE

Eligibility

Sex/Gender
FEMALE
Age
18 Years to No maximum
Healthy volunteers
Yes

Inclusion criteria

All Participants: * Women not of childbearing potential may participate and include those who are infertile due to surgical sterilization (hysterectomy, bilateral oophorectomy, bilateral salpingectomy or tubal ligation), congenital anomaly such as mullerian agenesis; or postmenopausal * Are between the body mass index (BMI) of 18.0 and 42.0 kilograms per meter squared (kg/m²), inclusive, at screening Healthy Participants: \- Healthy females as determined by medical history, physical examination, and other screening procedures, with normal liver function Participants with Impaired Liver Function: * Females with chronic mild, moderate and severe liver impairment, assessed by Child-Pugh scoring * Have diagnosis of chronic hepatic impairment (\>6 months), with no clinically significant changes within 90 days prior to study drug administration.

Exclusion criteria

* Women of childbearing potential are excluded from the study. * Have known allergies to imlunestrant or related compounds * Have a history of alcoholism or drug/chemical abuse within 2 years prior to check-in * Have received blood products within 2 months prior to check-in * Have evidence of HIV infection and/or positive human HIV antibodies * Have used or intend to use medications that are strong inhibiters or inducers of cytochrome P450 (CYP)3A4 * Who smoke more than 10 cigarettes or use the equivalent tobacco, smoking-cessation products, nicotine-containing products, or e-cigarettes (nicotine and non-nicotine) per day. * Have a history or presence of cardiovascular (eg, symptomatic bradycardia with resting heart rate of \<60 beats per minute), respiratory, renal, gastrointestinal, endocrine, hematological, or neurological disorders capable of significantly altering the absorption, metabolism, or elimination of drugs

Design outcomes

Primary

MeasureTime frameDescription
Pharmacokinetics (PK): Maximum Observed Concentration (Cmax) of ImlunestrantDay 1 (Predose, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 24, 36, 48, 72, 96, 120, 144, 168, 192, 216, 240 hours post dose)PK: Cmax of Imlunestrant is reported.
PK: Area Under the Concentration-time Curve From 0 to the Last Measurable Concentration (AUC[0-t]) of ImlunestrantDay 1 (Predose, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 24, 36, 48, 72, 96, 120, 144, 168, 192, 216, 240 hours post dose)AUC(0-t) of Imlunestrant is reported.

Countries

United States

Participant flow

Participants by arm

ArmCount
Imlunestrant (Normal Hepatic Function)
Participants received a single dose of Imlunestrant 400 mg administered orally on Day 1 in fasted state.
9
Imlunestrant (Mild Hepatic Impairment)
Participants received a single dose of Imlunestrant 400 mg administered orally on Day 1 in fasted state.
6
Imlunestrant (Moderate Hepatic Impairment)
Participants received a single dose of Imlunestrant 400 mg administered orally on Day 1 in fasted state.
6
Imlunestrant (Severe Hepatic Impairment)
Participants received a single dose of Imlunestrant 200 mg administered orally on Day 1 in fasted state.
6
Total27

Baseline characteristics

CharacteristicImlunestrant (Normal Hepatic Function)TotalImlunestrant (Severe Hepatic Impairment)Imlunestrant (Moderate Hepatic Impairment)Imlunestrant (Mild Hepatic Impairment)
Age, Continuous60.3 years
STANDARD_DEVIATION 5
60.8 years
STANDARD_DEVIATION 6
57.3 years
STANDARD_DEVIATION 3.1
59.2 years
STANDARD_DEVIATION 8.3
66.7 years
STANDARD_DEVIATION 3.1
Ethnicity (NIH/OMB)
Hispanic or Latino
4 Participants15 Participants3 Participants3 Participants5 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
5 Participants12 Participants3 Participants3 Participants1 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants1 Participants0 Participants1 Participants0 Participants
Race (NIH/OMB)
Asian
0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Black or African American
1 Participants1 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
More than one race
0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
White
8 Participants25 Participants6 Participants5 Participants6 Participants
Region of Enrollment
United States
9 Participants27 Participants6 Participants6 Participants6 Participants
Sex: Female, Male
Female
9 Participants27 Participants6 Participants6 Participants6 Participants
Sex: Female, Male
Male
0 Participants0 Participants0 Participants0 Participants0 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
deaths
Total, all-cause mortality
0 / 90 / 60 / 60 / 6
other
Total, other adverse events
0 / 90 / 62 / 62 / 6
serious
Total, serious adverse events
0 / 90 / 61 / 60 / 6

Outcome results

Primary

Pharmacokinetics (PK): Maximum Observed Concentration (Cmax) of Imlunestrant

PK: Cmax of Imlunestrant is reported.

Time frame: Day 1 (Predose, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 24, 36, 48, 72, 96, 120, 144, 168, 192, 216, 240 hours post dose)

Population: All participants who received at least one dose of study drug and had evaluable PK data.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Imlunestrant (Normal Hepatic Function)Pharmacokinetics (PK): Maximum Observed Concentration (Cmax) of Imlunestrant58.0 nanograms per milliliter (ng/mL)Geometric Coefficient of Variation 56
Imlunestrant (Mild Hepatic Impairment)Pharmacokinetics (PK): Maximum Observed Concentration (Cmax) of Imlunestrant74.9 nanograms per milliliter (ng/mL)Geometric Coefficient of Variation 47
Imlunestrant (Moderate Hepatic Impairment)Pharmacokinetics (PK): Maximum Observed Concentration (Cmax) of Imlunestrant87.6 nanograms per milliliter (ng/mL)Geometric Coefficient of Variation 51
Imlunestrant (Severe Hepatic Impairment)Pharmacokinetics (PK): Maximum Observed Concentration (Cmax) of Imlunestrant46.2 nanograms per milliliter (ng/mL)Geometric Coefficient of Variation 49
Primary

PK: Area Under the Concentration-time Curve From 0 to the Last Measurable Concentration (AUC[0-t]) of Imlunestrant

AUC(0-t) of Imlunestrant is reported.

Time frame: Day 1 (Predose, 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 24, 36, 48, 72, 96, 120, 144, 168, 192, 216, 240 hours post dose)

Population: All participants who received at least one dose of study drug and had evaluable PK data.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Imlunestrant (Normal Hepatic Function)PK: Area Under the Concentration-time Curve From 0 to the Last Measurable Concentration (AUC[0-t]) of Imlunestrant1970 nanograms*hour per milliliter (ng*h/mL)Geometric Coefficient of Variation 51
Imlunestrant (Mild Hepatic Impairment)PK: Area Under the Concentration-time Curve From 0 to the Last Measurable Concentration (AUC[0-t]) of Imlunestrant2410 nanograms*hour per milliliter (ng*h/mL)Geometric Coefficient of Variation 27
Imlunestrant (Moderate Hepatic Impairment)PK: Area Under the Concentration-time Curve From 0 to the Last Measurable Concentration (AUC[0-t]) of Imlunestrant4320 nanograms*hour per milliliter (ng*h/mL)Geometric Coefficient of Variation 50
Imlunestrant (Severe Hepatic Impairment)PK: Area Under the Concentration-time Curve From 0 to the Last Measurable Concentration (AUC[0-t]) of Imlunestrant2820 nanograms*hour per milliliter (ng*h/mL)Geometric Coefficient of Variation 47

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026