Abstract
Darunavir (DRV) is approved for once-daily use in patients with no DRV resistance-associated mutations (RAMs) and twice-daily use in those with DRV RAMs. Several studies suggest that once-daily DRV retains efficacy in the setting of 1-2 DRV RAMs whereas three or more DRV RAMs are needed for DRV resistance. There are few data to support the long-term use of once-daily DRV in patients with DRV RAMs. This observational study evaluated 48-week clinical outcomes of 22 treatment-experienced patients with ≥1 DRV RAMs switched to once-daily DRV between 2014 and 2017. The primary endpoint was HIV-1 RNA <50 copies/ml at week 48. Safety parameters were analyzed throughout the study. The median age of the sample was 53 years, 18 (82%) had baseline HIV-1 RNA <50copies/ml, and the median number of historical DRV RAMs was 2. At week 48, 20 (91%) had HIV-1 RNA < 50copies/ml, and 2 (9%) had HIV-1 RNA of 82 and 59,637copies/ml and reported non-adherence. No adverse drug reactions were observed through week 48. Once-daily DRV maintained virologic control in patients with ≥1 historical DRV RAMs and was safe and well-tolerated. Further data are needed to validate this as a viable treatment option in this population.
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