Additional Relevant Details The Type II variation application is based on the results of two large placebo-controlled trials of Truvada for PrEP, the Pre-Exposure Prophylaxis Initiative (iPrEX) and Partners PrEP, sponsored by the U.S. National Institutes of Health and the University of Washington, respectively. In studies of Truvada for PrEP, the most commonly reported side effects included headache, stomach discomfort and weight loss. The incidence and types of side effects were consistent with Truvada’s safety and tolerability profile when used as part of an HIV treatment regimen.