暴露后是否可以通过药物预防HIV？

Yes. Taking medicine after being potentially exposed to HIV, called post-exposure prophylaxis (or PEP), can keep you from becoming infected. But PEP must be started within 72 hours after a possible exposure.

If you think you’ve recently been exposed to HIV during sex (for example, if the condom breaks) or through sharing needles and works to prepare drugs (for example, cotton, cookers, water), talk to your health care provider or an emergency room doctor about PEP right away. The sooner you start PEP, the better; every hour counts. If you’re prescribed PEP, you’ll need to take it once or twice daily for 28 days.

Someone who is on PEP should continue to use condoms with sex partners and safe injection practices while taking PEP.