Pre-exposure prophylaxis (PrEP) is an effective intervention for reducing risk of HIV infection and is a key component for HIV elimination efforts in the US.
1-3 As of 2023, 2 daily oral PrEP regimens has been approved by the US Food and Drug Administration: emtricitabine/tenofovir disoproxil fumarate (TDF) was approved in 2012, while emtricitabine/tenofovir alafenamide fumarate (TAF) was approved in 2019.
4,5 While efficacy trials demonstrated that the 2 regimens are comparable in terms of effects for HIV prevention and overall safety,
6-8 data from the DISCOVER trial
7,8 showed that individuals taking TAF for PrEP had better bone and kidney health markers than those taking TDF. Further, those in the TAF arm had greater weight gain, while those in the TDF arm experienced greater declines in total cholesterol and low-density lipoprotein cholesterol (LDL-C) during follow-up.
8 These findings are consistent with studies in people with HIV who demonstrated elevations in weight, total cholesterol, and LDL-C levels associated with TAF use for HIV antiretroviral therapy.
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