HIV Prevention Pill Use br Has Risen 500 The use of the HIV prevention pill, known as pre-exposure prophylaxis, or PrEP, increased 500 br from 2014 to 2017. The CDC reports that the medication is 90 effective. Over one-third of people at risk of contracting HIV are now protected. But use has remained low in populations of black and HispanicLatino men who have sex with men. According to the researchers, there are "structural barriers associated with race that influence access to high-quality care." PrEP costs up to $1,800 a month for the uninsured. Condom use is recommended alongside PrEP use.