title: Effect of clonidine on sympathetic nervous activity in hydralazine-treated hypertensive patients.
mesh_terms: D000328:Adult; D002986:Clinical Trials as Topic; D003000:Clonidine / Q000494:pharmacology / Q000627:therapeutic use*; D004305:Dose-Response Relationship, Drug; D004359:Drug Therapy, Combination; D006339:Heart Rate / Q000187:drug effects; D006801:Humans; D006830:Hydralazine / Q000627:therapeutic use*; D006973:Hypertension / Q000188:drug therapy*; D008875:Middle Aged; D009638:Norepinephrine / Q000652:urine; D013564:Sympathetic Nervous System / Q000187:drug effects*
chemical_list: D006830:Hydralazine; D003000:Clonidine; D009638:Norepinephrine