Key takeaways
Truvada (emtricitabine/tenofovir disoproxil fumarate) and Viread (tenofovir disoproxil fumarate) are both used to treat HIV, but they have some differences. Truvada is a combination medication that includes emtricitabine and tenofovir disoproxil fumarate, while Viread contains only tenofovir disoproxil fumarate. Truvada is also used for HIV PrEP (pre-exposure prophylaxis) to prevent HIV infection, whereas Viread is not used alone for PrEP but can be part of a PrEP regimen. Additionally, Viread is approved to treat chronic hepatitis B, while Truvada is not. Both medications can cause side effects like kidney problems and bone issues, but Truvada may also cause headaches and belly pain when used for PrEP. Truvada is taken once daily as a tablet, and Viread is available as both a tablet and a powder for those who have trouble swallowing pills. Both medications require regular blood tests to monitor your health.
