Merck's Investigational Two-Drug Regime Matches Gilead's Three-Drug Tablet For HIV Treatment

Core Insights - Merck & Co. Inc. has reported positive topline results from a Phase 3 trial of the investigational drug regimen doravirine/islatravir (DOR/ISL) for treatment-naïve adults with HIV-1 infection [1][2] - The trial demonstrated that DOR/ISL met the primary efficacy criterion, showing non-inferiority to the existing treatment Biktarvy (bictegravir/emtricitabine/tenofovir alafenamide) [2][5] - The safety profile of DOR/ISL was comparable to that of Biktarvy, fulfilling the primary safety objective of the trial [3][5] - The FDA has accepted the New Drug Application (NDA) for DOR/ISL, with a target action date set for April 28, 2026 [3] Efficacy and Safety - The primary efficacy success criterion was based on the percentage of participants achieving HIV-1 RNA levels below 50 copies/mL at Week 48 [2] - Both Phase 3 trials conducted in March showed that DOR/ISL met the primary efficacy and safety objectives at Week 48 [5] Regulatory Status - The FDA's acceptance of the NDA for DOR/ISL indicates a significant step towards potential market entry, aiming to replace current antiretroviral regimens for virologically-suppressed patients [3] Market Performance - Following the announcement, Merck's stock experienced a decline of 1.48%, trading at $95 [5]