PrEP acts as a catalyst that helps the body produce antibodies, which help diseases causing germs and viruses. After contact with the virus, the tenofovir and emtricitabine block the enzyme needed by the virus to replicate. Used correctly, PrEP eliminates the risk of contracting the virus after exposure.
Is PrEP effective after 3 days?
How long do I have to take PrEP before it is highly effective? PrEP reaches maximum protection from HIV for receptive anal sex (bottoming) at about 7 days of daily use. For receptive vaginal sex and injection drug use, PrEP reaches maximum protection at about 21 days of daily use.
Does PrEP actually work?
PrEP is highly effective for preventing HIV. PrEP reduces the risk of getting HIV from sex by about 99% when taken as prescribed.
Are condoms better than PrEP?
Summary. PrEP provides nearly perfect protection from HIV, but no protection from other STIs. Condoms, used consistently and correctly, provide good protection from HIV and reduce the risk you'll contract other STIs. Condoms only work if you use them and if they fully cover the source of any infection.
Should I be on PrEP If I use condoms?
Condoms provide protection against other STDs, in particular gonorrhea and chlamydia. Since twice-yearly STD screening is part of maintaining a PrEP prescription, going on PrEP can help you more promptly diagnose and treat any STDs you may contract.