title: Antihypertensive effect of atenolol alone or combined with chlorthalidone in patients with essential hypertension.
mesh_terms: D000284:Administration, Oral; D000328:Adult; D000368:Aged; D001262:Atenolol / Q000008:administration & dosage* / Q000097:blood / Q000494:pharmacology; D001794:Blood Pressure / Q000187:drug effects; D002752:Chlorthalidone / Q000008:administration & dosage* / Q000494:pharmacology; D002986:Clinical Trials as Topic; D004311:Double-Blind Method; D004359:Drug Therapy, Combination; D006339:Heart Rate / Q000187:drug effects; D006801:Humans; D006973:Hypertension / Q000188:drug therapy*; D008875:Middle Aged; D010919:Placebos; D011412:Propanolamines / Q000008:administration & dosage*
chemical_list: D010919:Placebos; D011412:Propanolamines; D001262:Atenolol; D002752:Chlorthalidone