title: Psychophysics of psilocybin and   9 -tetrahydrocannabinol.
mesh_terms: D000328:Adult; D002188:Cannabis / Q000494:pharmacology*; D013759:Dronabinol / Q000008:administration & dosage / Q000494:pharmacology; D006801:Humans; D008297:Male; D011562:Psilocybin / Q000008:administration & dosage / Q000494:pharmacology*; D011601:Psychophysics; D012677:Sensation / Q000187:drug effects; D013997:Time Factors; D014110:Touch / Q000187:drug effects; D014785:Vision, Ocular / Q000187:drug effects
chemical_list: D011562:Psilocybin; D013759:Dronabinol