Does PrEP protect against other sexually transmitted infections (STIs)?

While PrEP does not protect against other STIs (syphilis, gonorrhoea, chlamydia and trichomoniasi) or unwanted pregnancy, it can be paired with condoms and other prevention strategies for additional protection. It's also important to remember that STIs remain relatively easy to treat or cure.

lab tests should be run every three months to make sure that any STI is treated once the tests show so.

https://www.hrc.org/resources/is-prep-right-for-me