Intervention: Elbasvir
Trial phase: Phase 1
ATC code: J05AP10 | J05AP54
SMILES: [H][C@@]1(c2ncc(-c3ccc4c(c3)O[C@@H](c3ccccc3)n3c-4cc4cc(-c5cnc([C@]6([H])CCCN6C(=O)[C@@H](NC(=O)OC)C(C)C)[nH]5)ccc43)[nH]2)CCCN1C(=O)[C@@H](NC(=O)OC)C(C)C
Sex: All
Age groups: Adult | Older Adult
Healthy volunteers: Accepts Healthy Volunteers
Participants at risk: 7
Group description: Single oral dose of 5 x 10 mg capsules of elbasvir administered to participants with severe hepatic insufficiency, defined as a score of 10 to 15 on the Child-Pugh scale
Eligibility criteria:
Inclusion Criteria:

Body mass index (BMI) 19 - 40 kg/m^2, inclusive
In good health based on medical history, physical examination, vital signs, and laboratory safety tests
No clinically significant abnormality on electrocardiogram (ECG)
For participants with hepatic insufficiency only, diagnosis of chronic (> 6 months), stable (no acute episodes of illness within the previous 2 months due to deterioration in hepatic function) hepatic insufficiency with features of cirrhosis due to any cause
For participants with hepatic insufficiency only, score on the Child-Pugh scale must range from 5 to 6 for mild hepatic insufficiency, from 7 to 9 for moderate hepatic insufficiency, and from 10 to 15 for severe hepatic insufficiency
Females of childbearing potential must be either be sexually inactive (abstinent) for 14 days before study drug administration and throughout the study or be using an acceptable method of birth control
Females of non-childbearing potential must have undergone sterilization procedures at least 6 months before Study Day 1
Non-vasectomized males must agree to use a condom with spermicide or abstain from sexual intercourse during the study and for 3 months after study drug administration
Ability to swallow multiple capsules

Exclusion Criteria:

Previously enrolled in this study
Mentally or legally incapacitated, significant emotional problems at the time of screening or expected during the conduct of the study, or a history of a clinically significant psychiatric disorder over the last 5 years
History or presence of significant cardiovascular, pulmonary, renal, hematologic, gastrointestinal, endocrine, immunologic, dermatologic, neurological disease
History of any illness that might confound the results of the study or pose an additional risk to the participant by participating in the study
For participants with hepatic insufficiency only, estimated creatinine clearance (CrCl) ≤30 mL/min based on the Cockcroft-Gault equation at screening
History or presence of drug abuse within the past 2 years
For healthy participants only, history of alcoholism within the past 2 years
Females who are pregnant or lactating
Positive results for the urine drug screen at screening or check-in
Positive results at screening or history of human immunodeficiency virus (HIV) or untreated hepatitis C virus (HCV); HCV ribonucleic acid (RNA)-negative participants documented to be cured following anti-HCV treatment are eligible
For healthy participants only, positive results at screening for hepatitis B surface antigen (HBsAg)
Use of any drugs or substances known to be strong inhibitors of cytochrome P450 3A4 (CYP3A4) enzymes and/or P-glycoprotein (P-gp) or any inhibitors of organic anion transporting peptide 1B (OATP1B) within 14 days or 5-times the half-life of the product (for healthy participants) or which cannot be discontinued at least 14 days or 5 times the half-life of the product (for hepatic insufficiency participants) before study drug administration and throughout the study
Use of any drugs or substances known to be strong inducers of CYP3A4 enzymes and/or P-gp, including St-John's Wort or rifampin, within 28 days or 5 times the half-life of the product before study drug administration
Currently use of any medication or substance which cannot be discontinued or maintained at a steady dose and regimen at least 14 days before study drug administration and throughout the study
For healthy participants only, on a special diet within 28 days before study drug administration
Blood donation >500 mL or significant blood loss within 56 days before study drug administration
Plasma donation within 7 days before study drug administration
Participation in another clinical study within 28 days before study drug administration