A Clinical Study of Islatravir and Its Interaction With Lamivudine (MK-8591-058)

An Open-Label Study to Evaluate the Effect of Multiple Doses of Lamivudine on the Single Dose Pharmacokinetics of Islatravir in Healthy Participants

The goal of this study is to learn what happens to the medication islatravir (ISL), in a healthy person's body over time--called a pharmacokinetic (PK) study. Researchers want to compare the amount of islatravir in the blood when it is taken alone as a single dose and when it is taken with multiple doses of another medication called lamivudine (3TC).

Inclusion Criteria:

The key inclusion criteria include but are not limited to the following:

• Is in good health before randomization
• Has a body mass index (BMI) ≥18 and ≤32 kg/m^2

Exclusion Criteria:

The key exclusion criteria include but are not limited to the following:

• Has a history of clinically significant endocrine, gastrointestinal (GI), cardiovascular, hematological, hepatic, immunological, renal, respiratory, genitourinary, or major neurological (including stroke and chronic seizures) abnormalities or diseases
• Is a smoker and/or has used nicotine or nicotine-containing products (for example, nicotine patch and electronic cigarette) within 3 months prior to entering the study