Hallucinogen Persisting Perception Disorder (HPPD) and Flashbacks

Hallucinogen Persisting Perception Disorder, or HPPD, is among the more mysterious, debilitating, and under-researched possibilities of psychedelic drug-taking.

As enthusiasm around psychedelics and their possible benefits continues to grow, it’s imperative that researchers, user populations, and clinicians look closely at HPPD and other possible hazards.