Clinical trial NCT02429791
Conditions: HIV Infections
Keywords: two-drug regimen virologically-suppressed dolutegravir plus rilpivirine integrase inhibitor protease inhibitor NNRTI-sparing non-nucleoside reverse transcriptase inhibitor HIV nucleoside reverse transcriptase inhibitors
Sponsor: ViiV Healthcare
Start date: 2015-04-14; Completion date: 2023-05-30
Enrollment: 510 participants; Allocation: RANDOMIZED; Intervention model: PARALLEL

Brief summary:
The aim of this study was to determine if virologically suppressed human immunodeficiency virus type 1 (HIV-1) infected adults on an antiretroviral regimen (including 2 nucleoside reverse transcriptase inhibitors \[NRTIs\] plus a third agent) remain suppressed upon switching to a two-drug regimen with dolutegravir (DTG) + rilpivirine (RPV). The study primarily assessed the non-inferiority antiviral activity of switching to DTG + RPV once daily compared to continuation of current antiretroviral regimen (CAR) up to Week 48 with a switch visit for eligible subjects in the CAR group to initiate DTG + RPV therapy at Week 52. CAR included 2 NRTIs plus 1 HIV-1 integrase inhibitor (INI), or 1 non-nucleoside reverse transcriptase inhibitor (NNRTI), or 1 protease inhibitor (PI). The study included a 148-week open-label treatment phase, comprising of an Early Switch Phase (Day 1 to Week 52) and a Late Switch Phase (Week 52 to Week 148). The participants fulfilling the study eligibility criteria participated in the Early Switch Phase where they either switched from their CAR to DTG + RPV, or continued taking their CAR, until Week 52. At the end of Early Switch Phase, eligible participants proceeded to the Late Switch Phase where all participants in both DTG + RPV and CAR treatment groups received DTG + RPV therapy until Week 148. After Week 148, eligible subjects were given the opportunity to continue receiving DTG +RPV, in the Continuation Phase.

Detailed description:

Arms: arm 1: Participants continued to receive their CAR (two nucleoside reverse transcriptase inhibitors \[NRTIs\] + a third agent). A third agent included either an: integrase strand transfer inhibitor (INSTI), a non-nucleoside reverse transcriptase inhibitor (NNRTI) or a protease inhibitor (PI). CAR was administered according to the approved labeling in an open-label fashion up to Week 52 during the Early Switch Phase. At Week 52, participants with human immunodeficiency virus-1 (HIV-1) ribonucleic acid (RNA) less than (\<) 50 copies (c)/mL, switched to DTG 50 mg + RPV 25 mg once daily and were followed-up through the Late Switch Phase, at Week 148 and through the Continuation Phase, after Week 148. arm 2: Participants received DTG 50 mg + RPV 25 mg together, once daily, at approximately the same time, with a meal, in an open-label fashion up to Week 52, during the Early Switch Phase. Participants continued to receive DTG 50 mg + RPV 25 mg up to Week 148 during the Late Switch Phase. Participants who successfully completed 148 weeks of treatment were given the opportunity to continue to receive DTG + RPV once daily in the Continuation Phase (after Week 148).
Interventions: intervention 1: DTG 50 mg intervention 2: RPV 25 mg intervention 3: CAR
Intervention descriptions: intervention 1: Participants received one oral tablet of 50 mg DTG daily administered concomitantly with RPV. Each DTG tablet contained 52.62 mg dolutegravir sodium salt, which was equivalent to 50 mg dolutegravir free acid. intervention 2: Participants received one oral tablet of 25 mg RPV daily administered concomitantly with DTG along with a meal. Each RPV tablet contained 27.5 mg of rilpivirine hydrochloride, which was equivalent to 25 mg of RPV. intervention 3: CAR included the following combinations: 2 NRTIs + 1 INI, 2 NRTIs + 1 NNRTI, or 2 NRTIs + 1 PI

Protocol documents: