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Frequently Asked Questions

How effective is PrEP?

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Answer

PrEP is highly effective for preventing HIV. Studies have shown that PrEP reduces the risk of getting HIV from sex by about 99% when taken as prescribed. Among people who inject drugs, PrEP reduces the risk of getting HIV by at least 74% when taken as prescribed. Currently, PrEP shots are not recommended for people who inject drugs. PrEP is less effective when not taken as prescribed.

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How long does it take for PrEP to work? Read answer What should I do if I miss a dose of PrEP? Read answer What are the different forms of PrEP available? Read answer Are there any side effects of PREP? Read answer Do I still need to use condoms if I’m on PrEP? Read answer What is the PAPI program? Read answer
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