Hallucinogen Persisting Perception Disorder (HPPD) is a rare condition linked to hallucinogenic drug use, often diagnosed in individuals with prior psychological issues or substance misuse, but it can occur after a single exposure. This review of 45 original studies examines proposed etiologies, the hallucinogens involved, clinical features of HPPD types I and II, psychiatric comorbidities, and available or potential treatments. The findings suggest that HPPD remains poorly understood, with limited therapeutic options, highlighting the need for further research.
Recreational drug use among holidaymakers in Ibiza often involves multiple substances, both traditional and novel, leading to acute psychiatric emergencies. The pattern of poly-substance use is linked to a range of psychopathological consequences. Better understanding of the specific effects of individual drugs, clearer diagnostic signs and symptoms, and long-term follow-up studies are needed.