Case 23. Managing Directly (Inter)Acting Medications

Chris presents a 62-yr-old man with HIV for >30 yrs, with viral suppression and many drug resistance mutations, whose ART must be changed due to a drug-drug interaction, but also for simplification. As part of their discussion, Chris and Eileen review reasons to change ART regimens, and work through the evidence-based options for this patient based on his history and resistance mutations profile.References Cited:Ciaffi L, Koulla-Shiro S, Sawadogo AB, et al. Boosted protease inhibitor monotherapy versus boosted protease inhibitor plus lamivudine dual therapy as second-line maintenance treatment for HIV-1-infected patients in sub-Saharan Africa (ANRS12 286/MOBIDIP): a multicentre, randomised, parallel, open-label, superiority trial. Lancet HIV. 2017 Sep;4(9):e384-e392. Epub 2017 May 28. PMID: 28566227.Hocqueloux L, Raffi F, Prazuck T, et al. Dolutegravir Monotherapy Versus Dolutegravir/Abacavir/Lamivudine for Virologically Suppressed People Living With Chronic Human Immunodeficiency Virus Infection: The Randomized Noninferiority MONotherapy of TiviCAY Trial. Clin Infect Dis. 2019 Oct 15;69(9):1498-1505. PMID: 30601976.Paton NI, Musaazi J, Kityo C, et al. Efficacy and safety of dolutegravir or darunavir in combination with lamivudine plus either zidovudine or tenofovir for second-line treatment of HIV infection (NADIA): week 96 results from a prospective, multicentre, open-label, factorial, randomised, non-inferiority trial. Lancet HIV. 2022 Jun;9(6):e381-e393. Epub 2022 Apr 20. PMID: 35460601.Raffi F, Babiker AG, Richert L, et al. Ritonavir-boosted darunavir combined with raltegravir or tenofovir-emtricitabine in antiretroviral-naive adults infected with HIV-1: 96 week results from the NEAT001/ANRS143 randomised non-inferiority trial. Lancet. 2014 Nov 29;384(9958):1942-51. Epub 2014 Aug 4. PMID: 25103176.Severe P, Pierre S, Homeus F, et al. Bictegravir, emtricitabine, and tenofovir alafenamide versus ritonavir-boosted protease inhibitor-based antiretroviral therapy in people with HIV and viral suppression on second-line therapy in Haiti: an open-label, randomised, non-inferiority trial. Lancet HIV. 2025 Sep;12(9):e616-e626. Erratum in: Lancet HIV. 2026 Feb;13(2):e84. Erratum in: Lancet HIV. 2026 Feb 24:S2352-3018(26)00037-8. PMID: 40883049.Related NYSDOH AI Guidelines:Second-Line ART After Treatment Failure or for Regimen SimplificationHIV Resistance AssaysDrug-Drug Interaction Guide: From HIV Prevention to TreatmentVirologic and Immunologic Monitoring in HIV Care