title: Dose response to hydrochlorothiazide in hypertensives receiving a calcium channel blocker.
abstract: Seven hypertensive patients receiving the dihydropyridine calcium channel blocking agent nicardipine were given placebo, 6.25, 12.5, 25 and 50 mg hydrochlorothiazide (HCTZ) in a randomized crossover design. Blood pressure (BP) decreased by about 7/3 mmHg irregardless of dose. In contrast, potassium, glucose and uric acid increased in a dose-dependent fashion. The hypokalemic and hyperglycemic responses at 50 mg were larger than usually seen with HCTZ. Low doses of HCTZ provided a modest antihypertensive effect, but 25 and 50 mg of HCTZ were no more effective in lowering BP and gave unusually large metabolic side effects when combined with a calcium channel blocker.
authors.affiliation: Department of Medicine, UCSD Medical Center, San Diego, CA 92103.
authors.forename: M G
authors.initials: MG
authors.lastname: Ziegler
authors.forename: E
authors.initials: E
authors.lastname: Lernhardt
authors.forename: V
authors.initials: V
authors.lastname: Solt-Buzsaki
mesh_terms: D001786:Blood Glucose / Q000378:metabolism; D001794:Blood Pressure / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D004359:Drug Therapy, Combination; D005260:Female; D006801:Humans; D006852:Hydrochlorothiazide / Q000008:administration & dosage*; D006973:Hypertension / Q000097:blood / Q000188:drug therapy* / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D009529:Nicardipine / Q000008:administration & dosage*; D011188:Potassium / Q000097:blood; D014527:Uric Acid / Q000097:blood
chemical_list: D001786:Blood Glucose; D006852:Hydrochlorothiazide; D014527:Uric Acid; D009529:Nicardipine; D011188:Potassium