Estimates in the 1960s and 1970s were around 1 in 20 for intermittent<unk>  among regular users of<unk> s. In a 2010 study of psychedelic users, 23.9% reported constant<unk> -like effects, however only 4.2% considered seeking treatment due to the severity.
Hallucinogen persisting perception disorder
Pollutant-induced abnormal behaviour
Prescription drug addiction
Body substance isolation
Psychedelic microdosing
Long-term effects of cannabis
Bullying in medicine
Effects of meditation