for people ages 1 month to 17 years (full criteria)
study started
estimated completion



This study will evaluate the pharmacokinetics (PK), safety, and efficacy of emtricitabine/tenofovir alafenamide (F/TAF) in HIV-1 infected children and adolescents virologically suppressed (defined as having < 50 copies/mL of HIV-1 RNA for a period of at least 6 months) while on a stable 2-nucleoside/nucleotide reverse transcriptase inhibitor (NRTI) containing regimen.

Official Title

A Phase 2/3, Open-Label, Multi-Cohort Switch Study to Evaluate Emtricitabine/Tenofovir Alafenamide (F/TAF) in HIV-1 Infected Children and Adolescents Virologically Suppressed on a 2-NRTI-Containing Regimen


Cohorts 2, 3, and 4 will be on a boosted protease inhibitor (PI) or any other 3rd ARV agent and will switch their current 2-NRTI-containing regimen to open-label F/TAF while continuing their boosted PI or 3rd agent through 48 weeks. A minimum of 10 participants each in Groups 1 and 2 of Cohort 2, and Cohorts 3 and 4, who are on boosted-ATV as their 3rd ARV agent will be enrolled. Participants in Cohort 2, Group 1 receive boosted PI agents only. Cohorts 2, 3, and 4 will be enrolled by cohort into a two-part study (Parts A and B).

After completion of 48 weeks, all participants will be given the option to participate in an extension phase of the study. Gilead will provide F/TAF until a) The participant turns 18 years old and F/TAF is commercially available for use in adults in the country in which the participant is enrolled or b), F/TAF becomes commercially available for pediatric use in the country in which the participant is enrolled or c), Gilead Sciences elects to terminate development of F/TAF in the applicable country.


HIV-1 HIV emtricitabine FTC tenofovir TDF TAF antiretroviral pharmacokinetic PK adolescents children pediatric Gilead F/TAF 3rd ARV agent


For people ages 1 month to 17 years

Key Inclusion Criteria:

  • HIV-1 infected male and female adolescents and children aged 1 month to < 18 years at baseline/Day 1 (according to requirements of the enrolling cohort)
  • Must be able to give written assent prior to any screening evaluations
  • Parent or guardian able to give written informed consent prior to any screening evaluations and willing to comply with study requirements
  • Body weight at screening as follows:
  • Cohort 1: ≥ 35 kg
  • Cohort 2, Group 1: ≥ 25 kg
  • Cohort 2, Group 2: 17 kg to < 25 kg
  • Cohort 3: to be updated per a protocol amendment
  • Cohort 4: to be updated per a protocol amendment
  • Currently on a stable 2-NRTI containing regimen that includes a 3rd ARV agent for ≥ 6 consecutive months prior to screening
  • Plasma HIV-1 RNA levels < 50 copies/mL for ≥ 6 consecutive months preceding the screening visit
  • No opportunistic infection within 30 days of study entry (at baseline/Day 1)
  • A negative serum β-human chorionic gonadotropin (HCG) pregnancy test is required for females of childbearing potential only

Key Exclusion Criteria:

  • An acquired immunodeficiency syndrome (AIDS) - indicator condition with onset within 30 days prior to screening
  • Life expectancy of < 2 years
  • Active, serious infections (other than HIV-1 infection) requiring parenteral antibiotic or antifungal therapy within 30 days prior to baseline/Day 1
  • Evidence of active pulmonary or extra-pulmonary tuberculosis disease within 3 months of the screening visit
  • Active hepatitis C virus (HCV) infection defined as positive for HCV antibody and having detectable HCV RNA
  • Positive hepatitis B surface antigen or other evidence of active hepatitis B virus (HBV) infection.
  • Have any serious or active medical or psychiatric illness which, in the opinion of the Investigator, would interfere with treatment, assessment, or compliance with the protocol.
  • Pregnant or lactating females
  • Have history of significant drug sensitivity or drug allergy
  • Have previously participated in an investigational trial involving administration of any investigational agent, other than tenofovir, within 30 days prior to the study dosing

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


  • UCLA
    Los Angeles California 90095 United States
  • Seattle Children's Hospital
    Seattle Washington 98105-0371 United States


in progress, not accepting new patients
Start Date
Completion Date
Gilead Sciences
Phase 2/3
Study Type
Last Updated