Abstract
OBJECTIVES: Treatment-related weight gain and metabolic complications with antiretroviral integrase-based regimens, especially among Black women, suggest the need for alternative options. METHODS: We conducted a 48-week, open-label, single-arm, single-centre, phase IIIb switch study to evaluate the tolerability, safety and efficacy of switching from stable efavirenz- or dolutegravir-based antiretroviral therapy to doravirine/lamivudine/tenofovir disoproxil fumarate in Black women. RESULTS: The 101 participants enrolled (median age 35 years; interquartile range 31-40) were on efavirenz (n = 46; mean duration on therapy 1.7 years) or dolutegravir-based (n = 55; mean duration 1.5 years) antiretrovirals at screening. Retention at 48 weeks was 92/101 participants, and viral suppression was >90% throughout the study, with a single case of doravirine resistance (106 M, V108I and H221Y mutations). The mean weight percentage change at week 48 was 4.7% (95% confidence interval [CI] 3.0-6.5; p < 0.001), and the adjusted mean change was 2.7 kg (95% CI 1.50-3.98; p < 0.001); for efavirenz, the percentage change was 5.0% (95% CI 2.9-7.1; p < 0.001), and the adjusted weight gain was 3.5 kg (95% CI 1.93-5.13); for dolutegravir, the percentage change was 4.5% (95% CI 1.8-7.3; p < 0.001), and the adjusted weight gain was 2.1 kg (95% CI 0.26-3.90). Statistically significant decreases in lipid panel percent mean to week 48 included: total cholesterol -8.4% (95% CI -11.3 to -5.5; p < 0.001), triglycerides -10.4% (95% CI -16.4 to -4.4; p < 0.001) and high-density lipoprotein -14.8% (95% CI -18.5 to -11.2%; p < 0.001), with minor differences when disaggregating the mean percent change in lipids between previous efavirenz/dolutegravir regimens. Adverse events due to doravirine were few and mild. CONCLUSIONS: Our findings suggest that a switch to doravirine from efavirenz or dolutegravir is safe and effective in Black women, with significant improvement in lipid profiles, but does not arrest progressive weight gain.