for people ages 18 years and up (full criteria)
at La Jolla, California and other locations
study started
estimated completion



The primary objectives of this study are to evaluate the efficacy, safety, and tolerability of switching abacavir/lamivudine (ABC/3TC) fixed-dose combination (FDC) tablets to emtricitabine/tenofovir alafenamide (F/TAF) FDC tablets versus maintaining ABC/3TC in human immunodeficiency virus type 1 (HIV-1) infected adults who are virologically suppressed on regimens containing ABC/3TC.

Official Title

A Phase 3b, Randomized, Double-Blind, Switch Study to Evaluate F/TAF in HIV-1 Infected Subjects Who Are Virologically Suppressed on Regimens Containing ABC/3TC


HIV-1 InfectionHIVHIV-1 PositiveVirologically-SuppressedLamivudineF/TAFABC/3TCThird ARV agent


For people ages 18 years and up

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 third 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
  • Males and females of childbearing potential 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.


  • University of California San Diego (UCSD)
    La JollaCaliforniaUnited States
  • La Playa Medical Group and Clinical Research
    San DiegoCaliforniaUnited States


in progress, not accepting new patients
Start Date
Completion Date
Gilead Sciences
Phase 3
Study Type
Last Updated