Hallucinogen Persisting Perception Disorder (HPPD) is a cognitive disorder in which individuals continuously re-experience visual and other sensory hallucinations that they first experienced while ...

Callen Ghahramani says he has had persistent visual distortions since trying what he thought was acid as a teenager. His symptoms — severe anxiety and depersonalization — reflect the common features ...

Psychedelic drugs are seeing a surge of interest from mainstream medicine, and initial results suggest that psychedelic-therapy can be a safe and effective treatment for some mental health conditions.

Those who have used psilocybin or LSD may be familiar with the experience: The day following your trip, it’s back to reality, yet there are still glimmers of your previous day’s journey, a fleeting ...

Ed Prideaux is a writer and researcher based in the U.K. who specializes in the study of hallucinogen-persisting perception disorder, or HPPD, and the mixed psychological and cultural effects of ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. (WGHP) — On Friday, the Los Angeles County ...

A.J. took two small hits off a cannabis vape pen, a common ritual with his morning coffee. Moments after exhaling, a transfigured, kaleidoscopic version of the world emerged before his eyes. "Some ...