title: Double-blind cross-over comparison of hydralazine and prazosin in hypertensive subjects on a beta-adrenoceptor blocking agent (atenolol).
mesh_terms: D001262:Atenolol / Q000627:therapeutic use*; D004311:Double-Blind Method; D004359:Drug Therapy, Combination; D006801:Humans; D006830:Hydralazine / Q000627:therapeutic use*; D006973:Hypertension / Q000188:drug therapy*; D011224:Prazosin / Q000627:therapeutic use*; D011412:Propanolamines / Q000627:therapeutic use*; D011799:Quinazolines / Q000627:therapeutic use*
chemical_list: D011412:Propanolamines; D011799:Quinazolines; D006830:Hydralazine; D001262:Atenolol; D011224:Prazosin