Tetrahydrocannabinol (THC) and cannabidiol (CBD) produce opposing effects; CBD has antipsychotic and neuroprotective properties and counteracts negative effects of THC.
Marihuana lahko prispeva k shizofreniji, sama po sebi pa je ne more povzročiti; raba marihuane ni ne nujen, ne zadosten razlog za razvoj nobene od oblik psihoze.