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LSD and other hallucinogens have long been said to cause flashbacks for some heavy users, but hallucinogen persisting perception disorder, or HPPD, is a unique phenomenon.
LSD and other hallucinogens have long been said to cause flashbacks for some heavy users, but hallucinogen persisting perception disorder, or HPPD, is a unique phenomenon.
LSD and other hallucinogens have long been said to cause flashbacks for some heavy users, but hallucinogen persisting perception disorder, or HPPD, is a unique phenomenon.
A rare condition called hallucinogen persisting perception disorder has puzzled researchers and raised alarms as psychedelics go mainstream.
Hallucinogen Persisting Perception Disorder (HPPD) is one of the after-effects neglected amid the rapid march of the psychedelic renaissance.