我需要接受多长时间的PrEP?

You must take PrEP daily for it to work. But there are several reasons people stop taking PrEP. For example,

• If your risk of getting HIV infection becomes low because of changes in your life, you may want to stop taking PrEP.
• If you find you don’t want to take a pill every day or often forget to take your pills, other ways of protecting yourself from HIV infection may work better for you.
• If you have side effects from the medicine that are interfering with your life, or if blood tests show that your body is reacting to PrEP in unsafe ways, your provider may stop prescribing PrEP for you.

You should discuss this question with your health care provider.