How long does it take for PrEP to work?

If you’re thinking of taking PrEP only when there’s a chance you could be having sex (like going to a party where someone you like will be), you can’t just take it that morning and think you’re protected.

It takes up to 7 days to be fully protected because the oral PrEP needs to build up in your body. To keep protected, you have to keep taking it every day for as long as you want the protection, or feel you are no longer at risk.  You don’t have to take it for the rest of your life, but only for as long as you feel you are at risk for HIV. And if you decide to stop taking oral PrEP, please go back to the clinic to get their help to stop.

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