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“PrEP” stands for Pre-Exposure Prophylaxis. The word “prophylaxis” means “to prevent or control the spread of an infection or disease.” PrEP is a way for people who don’t have HIV to prevent HIV infection by taking a pill every day. The pill contains two medicines that are also used to treat HIV. If you take PrEP and are exposed to HIV through sex or injection drug use, these medicines can work to keep the virus from taking hold in your body. Along with other prevention methods like condoms, PrEP can offer good protection against HIV if taken every day. People who use PrEP must be able to take the drug every day and to return to their health care provider every 3 months for a repeat HIV test, prescription refills, and follow-up. The pill approved by the U.S. Food and Drug Administration (FDA) for daily use as PrEP for people at very high risk of getting HIV infection is called Truvada®. Truvada® is a combination of two HIV medications (tenofovir and emtricitabine). These medicines work by blocking important pathways that HIV uses to set up an infection. If you take PrEP daily, the presence of the medicine in your bloodstream can often stop HIV from taking hold and spreading in your body. If you do not take PrEP every day, there may not be enough medicine in your bloodstream to block the virus. PrEP can only be prescribed by a health care provider and must be taken as directed to work.
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