每次非保护状态性交是否都可以用PEP？

PEP（暴露后预防）应该仅在紧急情况下使用。

PEP并不是针对那些可能频繁暴露于HIV的人群的最佳选择。例如，如果你经常与HIV阳性伴侣发生无保护的性行为，PEP就不适合你。因为PEP是在潜在暴露后使用的，它需要比暴露前预防（PrEP）更多的药物和更高的剂量来阻止感染。PrEP是指高风险人群每日服用抗HIV药物（如Truvada品牌）来降低感染HIV的几率。

如果你面临持续的HIV感染风险，建议与医生讨论使用PrEP的可能性。同时，你也可以了解关于PrEP的更多信息。

简而言之，PEP适用于紧急情况，而不是长期的预防措施。如果你经常暴露于HIV风险中，PrEP会是更合适的选择。

PEP should be used only in emergency situations.

PEP is not the right choice for people who may be exposed to HIV frequently—for example, if you often have sex without a condom with a partner who is HIV-positive. Because PEP is given after a potential exposure to HIV, more drugs and higher doses are needed to block infection than with PrEP, or pre-exposure prophylaxis. PrEP is when people at high risk for HIV take HIV medicines (sold under the brand name Truvada) daily to lower their chances of getting HIV.

If you are at ongoing risk for HIV, speak to your doctor about PrEP. Also, read our Q&As on PrEP.

In short, PEP is for emergency situations, not for long-term prevention. If you are frequently exposed to HIV risk, PrEP may be a more appropriate option.