On-Demand Preexposure Prophylaxis in Men at High Risk for HIV-1 Infection
- PMID:26624850
- DOI: 10.1056/NEJMoa1506273
On-Demand Preexposure Prophylaxis in Men at High Risk for HIV-1 Infection
Abstract
Background: Antiretroviral preexposure prophylaxis has been shown to reduce the risk of human immunodeficiency virus type 1 (HIV-1) infection in some studies, but conflicting results have been reported among studies, probably due to challenges of adherence to a daily regimen.
Methods: We conducted a double-blind, randomized trial of antiretroviral therapy for preexposure HIV-1 prophylaxis among men who have unprotected anal sex with men. Participants were randomly assigned to take a combination of tenofovir disoproxil fumarate (TDF) and emtricitabine (FTC) or placebo before and after sexual activity. All participants received risk-reduction counseling and condoms and were regularly tested for HIV-1 and HIV-2 and other sexually transmitted infections.
Results: Of the 414 participants who underwent randomization, 400 who did not have HIV infection were enrolled (199 in the TDF-FTC group and 201 in the placebo group). All participants were followed for a median of 9.3 months (interquartile range, 4.9 to 20.6). A total of 16 HIV-1 infections occurred during follow-up, 2 in the TDF-FTC group (incidence, 0.91 per 100 person-years) and 14 in the placebo group (incidence, 6.60 per 100 person-years), a relative reduction in the TDF-FTC group of 86% (95% confidence interval, 40 to 98; P=0.002). Participants took a median of 15 pills of TDF-FTC or placebo per month (P=0.57). The rates of serious adverse events were similar in the two study groups. In the TDF-FTC group, as compared with the placebo group, there were higher rates of gastrointestinal adverse events (14% vs. 5%, P=0.002) and renal adverse events (18% vs. 10%, P=0.03).
Conclusions: The use of TDF-FTC before and after sexual activity provided protection against HIV-1 infection in men who have sex with men. The treatment was associated with increased rates of gastrointestinal and renal adverse events. (Funded by the National Agency of Research on AIDS and Viral Hepatitis [ANRS] and others; ClinicalTrials.gov number,NCT01473472.).
Comment in
- PrEP on demand cuts HIV transmission in high risk men, study finds.McCarthy M.McCarthy M.BMJ. 2015 Dec 1;351:h6468. doi: 10.1136/bmj.h6468.BMJ. 2015.PMID:26628458No abstract available.
- TDF-FTC before and after sex reduced HIV infection but increased GI, renal events in men who have sex with men.Maki DG.Maki DG.Ann Intern Med. 2016 Mar 15;164(6):JC28. doi: 10.7326/ACPJC-2016-164-6-028.Ann Intern Med. 2016.PMID:26974728No abstract available.
- Preexposure prophylaxis on-demand dramatically reduces HIV incidence in MSM.Harper KN.Harper KN.AIDS. 2016 Jul 31;30(12):N19. doi: 10.1097/QAD.0000000000001141.AIDS. 2016.PMID:27139317No abstract available.
- Pharmacology supports on-demand PrEP.Glidden DV, Anderson PL, Grant RM.Glidden DV, et al.Lancet HIV. 2016 Sep;3(9):e405-e406. doi: 10.1016/S2352-3018(16)30114-X.Lancet HIV. 2016.PMID:27562738Free PMC article.No abstract available.
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