Intervention: Firsocostat
Trial phase: Phase 1
SMILES: COc1ccccc1[C@H](Cn1c(=O)n(C(C)(C)C(=O)O)c(=O)c2c(C)c(-c3ncco3)sc21)OC1CCOCC1
Sex: All
Age groups: Adult | Older Adult
Healthy volunteers: Accepts Healthy Volunteers
Participants at risk: 10
Group description: Matched normal hepatic function participants to severe hepatic impairment participants received a single dose of firsocostat 5 mg (1 × 5 mg capsule) orally on Day 1.
Eligibility criteria:
Key Inclusion Criteria:

Cohort 1 (Mild Hepatic Impairment):

Male and non-pregnant/non-lactating females with mildly impaired and normal hepatic function.
Individuals will be current non-smokers (no use of tobacco, nicotine-containing or tetrahydrocannabinol (THC)-containing products within the last 14 days).
Each individual in the control group will be matched for age (± 10 years), gender, race, and body mass index (± 15% 18 ≤ body mass index (BMI) ≤ 36 kg/m^2) with an individual in the mild hepatic impairment group.
Individuals with mild hepatic impairment must have a score of 5-6 on the Child-Pugh-Turcotte (CPT) Classification at screening, have diagnosis of chronic (> 6 months), and stable hepatic impairment with no clinically significant changes within 3 months (or 90 days) prior to study drug administration (Day 1).

Cohort 2 (Moderate Hepatic Impairment):

Male and non-pregnant/non-lactating females with moderately impaired and normal hepatic function.
Individuals will be current non-smokers (no smoking of tobacco, nicotine-containing or THC-containing products within the last 14 days).
Each individual in the control group will be matched for age (± 10 years), gender, race, and body mass index (± 15% 18 ≤ BMI ≤ 36 kg/m^2) with an individual in the moderate hepatic impairment group.
Individuals with moderate hepatic impairment must have a score of 7-9 on the CPT Classification at screening, have diagnosis of chronic (> 6 months), and stable hepatic impairment with no clinically significant changes within 3 months (or 90 days) prior to study drug administration (Day 1).

Cohort 3 (Severe Hepatic Impairment):

Male and nonpregnant/non-lactating females with severely impaired and normal hepatic function.
Individuals will be current non-smokers (no use of tobacco, nicotine-containing or THC-containing products within the last 14 days).
Each individual in the control group will be matched for age (± 10 years), gender, race, and body mass index (± 15% 18 ≤ BMI ≤ 36 kg/m^2) with an individual in the severe hepatic impairment group.
Individuals with severe hepatic impairment must have a score of 10-15 on the CPT Classification at screening, have diagnosis of chronic (> 6 months), and stable hepatic impairment with no clinically significant changes within 3 months (or 90 days) prior to study drug administration (Day 1).

Cohort 4 (Mild Hepatic Impairment):

Male and non-pregnant/non-lactating females with mildly impaired and normal hepatic function.
Individuals will be current non-smokers (no use of tobacco, nicotine-containing or THC-containing products within the last 14 days).
Each individual in the control group will be matched for age (± 10 years), gender, race, and body mass index (± 15% 18 ≤ body mass index (BMI) ≤ 36 kg/m^2) with an individual in the mild hepatic impairment group.
Individuals with mild hepatic impairment must have a score of 5-6 on the Child-Pugh-Turcotte (CPT) Classification at screening, have diagnosis of chronic (> 6 months), and stable hepatic impairment with no clinically significant changes within 3 months (or 90 days) prior to study drug administration (Day 1).

NOTE: Other protocol defined Inclusion/ Exclusion criteria may apply.