Doravirine Plus Integrase Strand Transfer Inhibitors as a 2-Drug Treatment–Switch Strategy in People Living with HIV: The Real-Life DORINI Multicentric Cohort Study

Background: Few data are available about the efficacy, durability, and tolerability of doravirine (DOR) + integrase strand inhibitors (INI) as a switching strategy among antiretroviral therapy (ART)-experienced people living with HIV (PLWH).Setting: Retrospective, multicenter cohort study investigating the durability, efficacy, and tolerability of 2 off-label drug associations of DOR + INI among ART-experienced PLWH.Methods: The study included PLWH who switched to DOR combined with either raltegravir (RAL) or dolutegravir (DTG) between June 1, 2020, and December 31, 2021, with at least 1 follow-up (FU) visit. Virologic, biometric, and metabolic parameters were evaluated at baseline (T0) and at 1-3 (T1), 6 (T2), and 12 (T3) months. Univariate and multivariate survival analyses assessed the 28-week probability of persistence on the regimens. Patient satisfaction was measured using the HIV Treatment Satisfaction Questionnaire.Results: Ninety-five PLWH were included, 52 in DOR + RAL and 43 in DOR + DTG. Six treatment discontinuations were reported during a mean of 37 (+/- 17) weeks of FU (incidence of 2.7 x 1000 person-weeks FU). Only 2 were the result of virological failure without resistance mutations. DOR + DTG demonstrated significantly higher 28-week persistence than DOR + RAL (HR 1.90, 95% CI: 1.24-2.90, log-rank: P = 0.003). Weight, waist circumference, and fasting lipids reduced considerably at T3 vs T0. Overall, high satisfaction with the new treatment was reported, particularly in the DOR + RAL (68 (64-72)/72), compared with the DOR + DTG group (58 (50-65)/72, P< 0.001).Conclusions: Our experience revealed few treatment discontinuations, improved metabolic parameters, and high patient satisfaction among ART-experienced PLWH switching to DOR combined with INI, irrespective of the specific INI used.