High levels of medication adherence observed; many interested in transitioning to long-term PrEP Preexposure prophylaxis (PrEP) is well tolerated by men who have sex with men (MSM) at episodic risk for HIV while on vacation, according to a study published online Aug. 15 in the Journal of Acquired Immune Deficiency Syndrome. James E. Egan, Ph.D., from...