PrEP reaches its maximum effectiveness after about 7 days of daily use for receptive anal sex. For other types of exposure, including vaginal sex, it may take up to 20 days.
How soon does PrEP start working?
23/08/2024 
23/08/2024 PrEP reaches its maximum effectiveness after about 7 days of daily use for receptive anal sex. For other types of exposure, including vaginal sex, it may take up to 20 days.
