A Study to Investigate the Pharmacokinetics, Safety, and Tolerability of Odalasvir and AL-335 Alone and in Combination With Simeprevir in Participants With Moderately Impaired Hepatic Function

The purpose of this study is to evaluate the pharmacokinetics (PK) of AL-335, odalasvir (ODV) and its metabolites ALS-022399 and ALS-022227, after a single oral dose of ODV and AL-335 respectively, in participants with moderately impaired hepatic function compared to participants with normal hepatic function. Also to evaluate the steady-state PK of AL-335 and its metabolites ALS-022399 and ALS-022227, ODV and simeprevir (SMV) after multiple oral doses of the combination of AL-335+ODV+SMV, in participants with moderately impaired hepatic function compared to participants with normal hepatic function.


Eligibility Criteria:
Inclusion Criteria:

* Participant must have a body mass index (BMI; weight in kilogram (kg) divided by the square of height in meters) of 18.0 to 35.0 kilogram per meter square (kg/m\^2) extremes included, and a body weight not less than 50.0 kg
* Participant must have a normal 12-lead electrocardiogram (ECG) (based on the mean value of triplicate ECG parameters) consistent with normal cardiac conduction and function at screening, as defined in the protocol
* Absence of findings indicative of hepatocellular carcinoma in an ultrasonography determined within 90 days prior to screening (or between screening and Day -1 of Part 1 of the study)
* Contraceptive use by women should be consistent with local regulations regarding the use of contraceptive methods for participants participating in clinical studies; a female participant with non childbearing potential must be; a) postmenopausal, or b) surgically sterile. Participant of childbearing potential must; a) have a negative highly sensitive serum (beta human chorionic gonadotropin \[beta hCG\]) pregnancy test at screening and a negative urine beta hCG pregnancy test at baseline (Day -1), and b) not get pregnant from screening until at least 60 days after the end of treatment by adhering to one of the acceptable methods of birth control to avoid pregnancy
* Contraceptive use by men should be consistent with local regulations regarding the use of contraceptive methods for participant participating in clinical studies: A male participant: a) must either be surgically sterile, or b) must not be heterosexually active from baseline until at least 60 days after the end of treatment or c) must be practicing an acceptable method of birth control from baseline until at least 60 days after the end of treatment, if heterosexually active with a woman of childbearing potential
* Participants with moderately impaired hepatic function (Cohort 1) must meet the following additional inclusion criteria:

  1. Participants must have a stable hepatic function as confirmed by serum bilirubin, serum albumin, prothrombin, ascites, and hepatic encephalopathy status measured during screening and those measured within 24 hours prior to first study drug administration on Day 1 in Part 1
  2. Participants must be hepatically impaired with a Class B classification as defined by the Child Pugh classification of severity of liver disease, that is, a total Child-Pugh score of 7 to 9, inclusive.
* Participants with normal hepatic function (Cohort 2) must meet the additional inclusion criteria to be enrolled in the study: Participants must have a normal hepatic function as confirmed by serum bilirubin, serum albumin, prothrombin, ascites, and hepatic encephalopathy status measured during screening and those measured within 24 hours prior to first study drug administration on Day 1 in Part 1

Exclusion Criteria:

* Participant has either: a history of renal insufficiency (estimated creatinine clearance lesser than (\<) 90 milliliter per minute per 1.73 meter square (mL/min/1.73m\^2) for estimated glomerular filtration rate \[eGFR\] according to the Chronic Kidney Disease Epidemiology Collaboration \[CKD- EPI\] equation) 18, or serum creatinine grade 1 or greater than (\>) 1.1\* upper limit of normal \[ULN\]) during screening
* Participant has any condition for which, in the opinion of the Investigator, participation would not be in the best interest of the participant (example, compromise the well-being), or that could prevent, limit, or confound the protocol-specified assessments
* Participant with any history of clinically significant skin disease such as, but not limited to, dermatitis, eczema, drug rash, psoriasis, food allergy, or urticarial
* Participant has known allergies, hypersensitivity, or intolerance to simeprevir (SMV), odalasvir (ODV), or AL 335, or their excipients
* Participant who smokes more than 10 cigarettes or 2 cigars or 2 pipes per day from within 90 days before screening until the end of the study