The British Journal of Psychiatry
Real-world effectiveness of antipsychotic medication in relapse prevention after cannabis-induced psychosis
May 2025 • Antti Mustonen, Heidi Taipale, Alexander Denissoff, Venla Ellilä, Marta Di Forti, Antti Tanskanen, Ellenor Mittendorfer‐Rutz, Jari Tiihonen, Solja Ni…
Background Cannabis use is linked to treatment non-adherence and relapses in psychotic disorders. Antipsychotic medication is effective for relapse prevention in primary psychoses, but its effectiveness after cannabis-induced psychosis (CIP) remains unclear. Aims To examine the effectiveness of antipsychotic medication for relapse prevention following the first clinically diagnosed CIP. Method A cohort of 1772 patients (84.1% men) with incident CIP was identified from the Swedish National Patient and Micro Data fo…