What is PrEP?

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PrEP means Pre-Exposure Prophylaxis, and it’s the use of anti-HIV medication that keeps HIV negative people from becoming infected. PrEP is approved by the FDA and has been shown to be safe and effective. A single pill taken once daily, it is highly effective against HIV when taken every day. The medication interferes with HIV’s ability to copy itself in your body after you’ve been exposed. This prevents it from establishing an infection and making you sick.


Even though PrEP has been around in the U.S. for over a year, not a lot of people know about it. And, even fewer people feel like they know enough about it to be able to make an informed decision about whether or not to use it. For those who do use it, the information they have might be more focused on practical issues, like where to get it, rather than on what PrEP does in the body to prevent HIV infection.


By using animation to show PrEP in the body and why “once a day” is recommended, people can see what PrEP does and people who currently use PrEP can create an image of what happens when they take a PrEP pill every day.

Please note that for cis women considering PrEP, current evidence suggests that maximum protection can be achieved after about 3 weeks of being on PrEP.


See CDC 2014 Clinical Practice Guidelines at




Learn More About PrEP


AIDS.gov - PrEP information page


AIDSinfoNet - Reliable, Up-To-Date Treatment Information


AVAC - Global Advocacy for HIV Prevention


Avert - AVERTing HIV and AIDS


CDC - Questions and Answers from the U.S Centers for Disease Control and Prevention


My PrEP Experience - Real stories from real people who adopted PrEP for prevention in the US


PrEP Facts - San Francisco AIDS Foundation PrEP information in visual format for MSM and heterosexual individuals, with an option for Spanish


PrEP Watch - Interactive webpage with information and resources on gaining access to PrEP


PrEP Watch - Interactive webpage with information and resources on gaining access to PrEP (prepwatch.org)


PrEParing for HIV - An Epidemic Interventions Initiative by the University of California


SFHIV - City and County of San Francisco Department of Public Health’s PrEP information page



Guidance for Use of PrEP in Practice and Research Settings

WHO - World Health Organization


CDC - Downloadable PDF from the Centers for Disease Control and Prevention


From the Makers of Truvada

start.truvada.com - Information about Truvada for PrEP for healthcare providers, consumers and educators


truvadapreprems.com/truvadaprep-resources - Downloadable forms and resources for PrEP prescribers and users


start.truvada.com/individual/truvadaprep-questions - Questions and Answers about Truvada for PrEP