title: St. John's wort: effect on CYP2D6 activity using dextromethorphan-dextrorphan ratios.
authors.forename: C A
authors.initials: CA
authors.lastname: Roby
authors.forename: D A
authors.initials: DA
authors.lastname: Dryer
authors.forename: A H
authors.initials: AH
authors.lastname: Burstein
mesh_terms: D000328:Adult; D019389:Cytochrome P-450 CYP2D6 / Q000187:drug effects* / Q000378:metabolism*; D003915:Dextromethorphan / Q000652:urine*; D003917:Dextrorphan / Q000652:urine*; D004347:Drug Interactions; D005260:Female; D006801:Humans; D020902:Hypericum / Q000378:metabolism*; D008297:Male; D012016:Reference Values
chemical_list: D003917:Dextrorphan; D003915:Dextromethorphan; D019389:Cytochrome P-450 CYP2D6