Effects of Ledipasvir/Sofosbuvir on the Pharmacokinetics and Renal Safety of Tenofovir Alafenamide (TAF)

Effects of Ledipasvir/Sofosbuvir Treatment on the Pharmacokinetics and Renal Safety of Tenofovir Alafenamide (TAF) in Patients With HIV.

This study will evaluate the effect of ledipasvir/sofosbuvir (LDV/SOF) treatment on the pharmacokinetics (PK) and renal safety of tenofovir in the form of tenofovir alafenamide (TAF). Subjects living with human immunodeficiency virus (HIV) who are receiving tenofovir-based antiretroviral therapy (in the form of tenofovir disoproxil fumarate [TDF]), and are also taking a ritonavir- or cobicistat-boosted protease inhibitor will be invited to participate.

The study will consist of five visits: a screening visit, three abbreviated 4-hour pharmacokinetic visits, and one end-of-study follow-up visit.

Subjects will also be asked to use a Wisepill device, which will track medication adherence throughout the study.

Inclusion Criteria:

• Between 18-70 years of age
• Have been taking TDF and a ritonavir- or cobicistat-boosted protease inhibitor as part of standard care for treatment of HIV

Exclusion Criteria:

• eGFR < 30 mL/min
• Pregnant or planning pregnancy
• Breastfeeding
• Any medical, social, or mental-health issue(s) that, in the opinion of the investigators, could interfere with study participation or the study outcomes
• Signs or symptoms of decompensated liver disease
• Hepatitis B infection
• Medications that may cause unwanted drug interactions with ledipasvir/sofosbuvir or emtricitabine/tenofovir alafenamide
• Unwillingness or inability to comply with study procedures
• Chronic hepatitis C infection