Switch Study to Evaluate F/TAF in HIV-1 Infected Adults Who Are Virologically Suppressed on Regimens Containing ABC/3TC

Key Inclusion Criteria:

• The ability to understand and sign a written informed consent form
• On antiretroviral regimen containing ABC/3TC FDC in combination with one 3rd agent for ≥ 6 consecutive months prior to screening
• Plasma HIV-1 RNA levels < 50 copies/mL for ≥ 6 months preceding the screening visit (measured at least twice using the same assay) and without experiencing two consecutive HIV-1 RNA above detectable levels after achieving a confirmed (two consecutive) HIV-1 RNA below detectable levels on the current regimen in the past year
• Plasma HIV-1 RNA should be < 50 copies/mL at the screening visit
• Normal ECG
• Estimated glomerular filtration rate (GFR) ≥ 50 mL/min according to the Cockcroft Gault formula for creatinine clearance
• Hepatic transaminases (AST and ALT) ≤ 5 × upper limit of normal (ULN)
• Total bilirubin ≤ 1.5 mg/dL, or normal direct bilirubin
• Adequate hematologic function
• Serum amylase ≤ 5 × ULN
• Females of childbearing potential and males must agree to utilize highly effective contraception methods or be non-heterosexually active or practice sexual abstinence from screening throughout the duration of study treatment and for 30 days following the last dose of study drug

Key Exclusion Criteria:

• A new AIDS-defining condition diagnosed within the 30 days prior to screening
• Hepatitis B surface antigen (HBsAg) positive
• Individuals experiencing decompensated cirrhosis
• Individuals receiving ongoing treatment with bisphosphonate to treat bone disease (eg, osteoporosis)
• Pregnant or lactating females
• Have an implanted defibrillator or pacemaker
• Current alcohol or substance use judged by the investigator to potentially interfere with study compliance
• A history of malignancy within the past 5 years (prior to screening) or ongoing malignancy other than cutaneous Kaposi's sarcoma (KS), basal cell carcinoma, or resected, non-invasive cutaneous squamous carcinoma.
• Active, serious infections (other than HIV-1 infection) requiring parenteral antibiotic or antifungal therapy within 30 days prior to Day 1 Visit
• Any other clinical condition or prior therapy that, in the opinion of the investigator, would make the individual unsuitable for the study or unable to comply with dosing requirements
• Participation in any other clinical trial (including observational trials) without prior approval
• Medications excluded due to the potential for interaction with emtricitabine (FTC), TAF, ABC or 3TC

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