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Descovy

Phase 3

HIV-1 Infection | Small molecule | Infectious Disease |Gilead Sciences, Inc.|Last Updated: Jun 27, 2025

Target and mechanism

ModalitySmall molecule

Also known as Treatment F

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindACTIVE_CONTROLLEDDMC
Total Trials2
Total Enrollment717

FDA Designations

No designations recorded

Clinical trial landscape

Descovy · 3 trials · 3 indications

Phase 3 2Phase 2 1
NCT02707601Efficacy, Safety, and Tolerability of Ledipasvir/Sofosbuvir (LDV/SOF) Treatment for HIV/HCV Co-infected Participants Who Switch to Elvitegravir/Cobicistat/Emtricitabine/Tenofovir Alafenamide (E/C/F/TAF) or Emtricitabine/Rilpivirine/Tenofovir Alafenamide (F/R/TAF) Prior to LDV/SOF HCV TreatmentHIV-1 Infection
COMPLETED150 Analytics
NCT02469246Switch Study to Evaluate F/TAF in HIV-1 Infected Adults Who Are Virologically Suppressed on Regimens Containing ABC/3TCHIV-1 Infection
COMPLETED567 Analytics
PHASE3COMPLETED
Efficacy, Safety, and Tolerability of Ledipasvir/Sofosbuvir (LDV/SOF) Treatment for HIV/HCV Co-infected Participants Who Switch to Elvitegravir/Cobicistat/Emtricitabine/Tenofovir Alafenamide (E/C/F/TAF) or Emtricitabine/Rilpivirine/Tenofovir Alafenamide (F/R/TAF) Prior to LDV/SOF HCV Treatment
HIV-1 InfectionUnlock trial analytics
PHASE3COMPLETED
Switch Study to Evaluate F/TAF in HIV-1 Infected Adults Who Are Virologically Suppressed on Regimens Containing ABC/3TC
HIV-1 InfectionUnlock trial analytics

Study Endpoints

Primary Endpoints

Percentage of Participants With HCV RNA < LLOQ at 12 Weeks After Discontinuation of LDV/SOF Treatment (SVR12)
HCV Posttreatment Week 12

Sustained Virologic Response (SVR12) was defined as HCV RNA \< the lower limit of quantitation (LLOQ) at 12 weeks after stopping LDV/SOF treatment.

Percentage of Participants With HIV-1 RNA < 50 Copies/mL at Week 48 as Determined by the FDA-Defined Snapshot Algorithm
Week 48

The percentage of participants achieving HIV-1 RNA \< 50 copies/mL at Week 48 was analyzed using the snapshot algorithm, which defines a participant's virologic response status using only the viral load at the predefined time point within an allowed window of time, along with study drug discontinuation status.

Pharmacokinetic (PK) Parameter (Cohort 1): AUCtau of Tenofovir Alafenamide (TAF)
Any time at Week 2 visit

AUCtau is defined as the area under the drug concentration versus time curve over the dosing interval.

PK Parameter (Cohort 2: Part A - Groups 1 and 2): AUCtau of TAF
Any time at Week 2 or Week 4 visit, or within 7 days after the completion of Week 2 or Week 4 visits

AUCtau is defined as the area under the drug concentration versus time curve over the dosing interval.

Percentage of Participants Experiencing Treatment-Emergent Adverse Events (TEAEs) and Serious Adverse Events (SAEs) Through Week 24
Baseline through Week 24

An AE is any untoward medical occurrence in a clinical study participant which does not necessarily have a causal relationship with the treatment. An AE can therefore be any unfavorable and/or unintended sign, symptom, or disease temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. The TEAEs were defined as any AEs with an onset date of on or after the study drug start date and no later than 30 days after permanent discontinuation of study drug or any AEs leading to premature discontinuation of study drug.

Secondary Endpoints

Percentage of Participants With HCV RNA < LLOQ at 4 Weeks After Discontinuation of LDV/SOF Treatment (SVR4)
HCV Posttreatment Week 4
Percentage of Participants With HIV-1 RNA ≥ 50 Copies/mL (Virologic Failure) 24 Weeks After Start of the F/TAF-Based Regimen Using Modified FDA Snapshot Algorithm
24 weeks after start of HIV treatment
Percentage of Participants Experiencing Grades 1 Through 4 Adverse Events After Switch to E/C/F/TAF or F/R/TAF Throughout the Study and During Coadministeration With LDV/SOF Treatment
Up to 32 weeks plus 30 days
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
E/C/F/TAF + LDV/SOFEXPERIMENTALPart 1: Participants will switch from 2 nucleoside reverse transcriptase inhibitors (NRTI) plus a third agent to E/C/F/TAF. Part 2: After 8 weeks of E/C/F/TAF treatment, the participants maintaining HIV-1 RNA \< 50 copies/mL will start receiving LDV/SOF for 12 weeks and continue their HIV treatment until the end of the study.
F/R/TAF + LDV/SOFEXPERIMENTALPart 1: Participants will switch from 2 NRTI plus a third agent to F/R/TAF. Part 2: After 8 weeks of F/R/TAF treatment, the participants maintaining HIV-1 RNA \< 50 copies/mL will start receiving LDV/SOF for 12 weeks and continue their HIV treatment until the end of the study.
F/TAF (Double-Blind)EXPERIMENTALF/TAF + ABC/3TC placebo + allowed 3rd antiretroviral (ARV) agent for 96 weeks After Week 96, participants will continue to take their blinded study drug and attend visits every 12 weeks until treatment assignments have been unblinded.
ABC/3TC (Double-Blind)ACTIVE_COMPARATORABC/3TC + F/TAF placebo + allowed 3rd ARV agent for 96 weeks After Week 96, participants will continue to take their blinded study drug and attend visits every 12 weeks until treatment assignments have been unblinded.
Open-Label F/TAFEXPERIMENTALAfter the unblinding visit, in countries where F/TAF FDC is not commercially available, participants (except in certain countries such as the UK) will be given the option to receive open-label F/TAF (200/10 mg or 200/25 mg) FDC and attend study visits every 12 weeks until it becomes commercially available, or until Gilead terminates the study in that country.
F/TAF+3rd ARV Agent (Cohort 1)EXPERIMENTALParticipants between 12 to \< 18 years of age and ≥ 35 kg in body weight will switch their current 2-NRTI containing regimen to F/TAF (200/25 mg for unboosted 3rd agent and 200/10 mg for boosted 3rd agent) while continuing on their 3rd ARV agent for 48 weeks.
F/TAF+3rd ARV Agent (Cohort 2, Part A - Group 1)EXPERIMENTALParticipants between 6 to \< 12 years of age and ≥ 25 kg in body weight must be on a boosted protease inhibitor (PI) as their 3rd ARV agent and will switch their current 2-NRTI regimen to F/TAF 200/25 mg while continuing on their boosted PI for 48 weeks.
F/TAF+3rd ARV Agent (Cohort 2, Part A - Group 2)EXPERIMENTALParticipants between 2 to \< 12 years of age and between 17 kg to \< 25 kg in body weight must be on a boosted protocol specified 3rd ARV agent and will switch their current 2-NRTI containing regimen to F/TAF 120/15 mg while continuing their 3rd ARV agent for 48 weeks.
FTC/TAF+3rd ARV Agent (Cohort 3, Part A)EXPERIMENTALParticipants between 2 to \< 6 years of age will receive F/TAF plus a 3rd ARV agent through 48 weeks.
FTC/TAF+3rd ARV Agent (Cohort 4, Part A)EXPERIMENTALParticipants between 1 month to \< 2 years of age will receive F/TAF plus a 3rd ARV agent through 48 weeks.
F/TAF+3rd ARV Agent (Cohort 2, Part B - Group 1)EXPERIMENTALScreening will be initiated for Part B following confirmation of TAF dose in Part A. Approximately 10 additional total participants will be enrolled across all Part B cohorts and will receive F/TAF while continuing their 3rd ARV agent through 48 weeks.
F/TAF+3rd ARV Agent (Cohort 2, Part B - Group 2)EXPERIMENTALScreening will be initiated for Part B following confirmation of TAF dose in Part A. Approximately 10 additional total participants will be enrolled across all Part B cohorts and will receive F/TAF while continuing their 3rd ARV agent through 48 weeks.
FTC/TAF+3rd ARV Agent (Cohort 3, Part B)EXPERIMENTALScreening will be initiated for Part B following confirmation of TAF dose in Part A. Approximately 10 additional total participants will be enrolled across all Part B cohorts and will receive F/TAF while continuing their 3rd ARV agent through 48 weeks.
FTC/TAF+3rd ARV Agent (Cohort 4, Part B)EXPERIMENTALScreening will be initiated for Part B following confirmation of TAF dose in Part A. Approximately 10 additional total participants will be enrolled across all Part B cohorts and will receive F/TAF while continuing their 3rd ARV agent through 48 weeks.
FTC/TAF+3rd ARV Agent (Extension Phase)EXPERIMENTALAfter 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 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.

Interventions

NameTypeDescription
E/C/F/TAFDRUG150/150/200/10 mg fixed dose combination (FDC) tablet administered orally once daily
F/R/TAFDRUG200/25/25 mg FDC tablet administered orally once daily
LDV/SOFDRUG90/400 mg FDC tablet administered orally once daily
F/TAFDRUG200/10 mg FDC tablet (with boosted 3rd ARV agents) or 200/25 mg FDC tablet (with unboosted 3rd ARV agents) administered orally once daily
ABC/3TCDRUG600/300 mg FDC tablets administered orally once daily
ABC/3TC PlaceboDRUGTablets administered orally once daily
F/TAF PlaceboDRUGTablets administered orally once daily
3rd ARV agentDRUGAn allowed 3rd ARV agent of the participant's pre-existing regimen may include one of the following boosted ARV agents: ritonavir boosted lopinavir (LPV/r), atazanavir (ATV) + ritonavir (RTV), ATV + cobicistat (COBI) or ATV/COBI FDC, darunavir (DRV) + RTV, DRV+COBI or DRV/COBI FDC; or, one of the following unboosted ARV agents: efavirenz (EFV), rilpivirine (RPV), raltegravir (RAL), dolutegravir (DTG), maraviroc (MVC), or nevirapine (NVP).
Boosted PIsDRUGAllowed boosted PIs: LPV, ATV, DRV.
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites43

Key Inclusion Criteria: * Chronic genotype (GT) 1, HCV infected, male and non-pregnant/ non-lactating female individuals, without cirrhosis, treatment-naive or treatment-experienced with interferon (IFN) +/- ribavirin (RBV) +/- HCV protease inhibitor (PI). * Compensated cirrhotic individuals must b...

Countries:United StatesPuerto RicoBelgiumCanadaDenmarkFranceGermanyIrelandItalySpainSwedenUnited KingdomPanamaSouth Africa
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