Schizophrenia and hallucinogen persisting perception disorder A clinical investigation.
We compared characteristics of schizophrenia patients with prior LSD use who developed hallucinogen persisting perception disorder (SCHHPPD) with those who did not (SCH-HPPD). Data were collected for 37 subjects in the SCHHPPD group and 43 subjects in the SCH-HPPD group. Socio-demographics and positive symptom scores were similar between groups. Individuals in the SCHIZOHPPD group scored lower on general psychopathology and negative symptoms scores. Individuals with schizophrenia and HPPD present with less severe psychopathology, despite persistent perceptual disturbances. Our findings highlight the importance of further research into this subset of patients.