Inclusion Criteria:  Patients ≥ 12 years of age Patients who had been diagnosed as Cannabis-induced psychosis by International statistical Classification of Disease and Related Health problem (ICD-10) on 2016 code F12.5 Patients had history of use of cannabis in medical chart Patients had the positive urine screening test of cannabis at the first day of admission  Exclusion Criteria:  Patients had psychosis from organic psychosis, defined by diagnosis by ICD-10 code F09.6 Unavailable data for evaluate of outcome especially data of drug use, content of drug use or urine screening test Patients who cancel of medical treatment before 7 day after admission.