So far, only studies of daily dosing (one pill taken once a day) have shown PrEP to be effective in preventing HIV. Studies have also found that people who take PrEP more regularly have higher levels of protection. Studies are going on right now to see if ”intermittent” PrEP taken less frequently can protect people from HIV, but there are no results from these studies yet.
Taking a pill every day can be difficult. Experts have recommended that providers offer adherence counseling and support to their patients on PrEP. People taking PrEP should also let their providers know if they are struggling to take their medication. There are a range of support options for adherence challenges.