Tolerability of four-drug antiretroviral combination therapy in primary HIV-1 infection.

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Rapid initiation of antiretroviral therapy (ART) is important for individuals with high baseline viral loads, such as in primary HIV-1 infection (PHI). Four-drug regimens are sometimes considered; however, data are lacking on tolerability. We aimed to evaluate the tolerability of four-drug regimens used in the Research in Viral Eradication of HIV-1 Reservoirs (RIVER) study.At enrolment, ART-naïve adult participants or those newly commenced on ART were initiated or intensified to four-drug regimens within 4 weeks of PHI. Rapid start was defined as pre-confirmation or ≤ 7 days of confirmed diagnosis. Primary and secondary outcomes were patient-reported adherence measured by 7-day recall and regimen switches between enrolment and randomization, respectively.Overall, 54 men were included: 72.2% were of white ethnicity, with a median age of 32 years old, 42.6% had a viral load of ≥ 100 000 HIV-1 RNA copies/mL, and in 92.6% sex with men was the mode of acquisition of HIV-1. Twenty (37%) started a four-drug regimen and 34 (63%) were intensified. Rapid ART initiation occurred in 28%, 100% started in ≤ 4 weeks. By weeks 4, 12, and 24, 37.0%, 69.0%, and 94.0% were undetectable (viral load

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Authors: J E Burns, W Stöhr, S Kinloch-De Loes, J Fox, A Clarke, M Nelson, J Thornhill, A Babiker, J Frater, S L Pett, S Fidler