title: Comparison of ketanserin and slow-release nifedipine added to the treatment of hypertensive patients uncontrolled by a thiazide diuretic plus beta-adrenoceptor blocker.
abstract: 1. Ketanserin or slow-release nifedipine were added to the treatment of 24 patients with hypertension uncontrolled by a thiazide diuretic plus beta-adrenoceptor antagonist in an observer-blind, randomised parallel-group study of 6 months duration. 2. At 6 months the mean falls in supine blood pressure were for ketanserin (mean daily dose 77 mg) 7/5 mm Hg and for nifedipine (mean daily dose 62 mg) 27/10 mm Hg. The difference between the treatments was significant for systolic blood pressure (P less than 0.02) and mean arterial pressure (P less than 0.05). Six nifedipine-treated patients reached target blood pressure, compared with one patient with ketanserin (P less than 0.02). 3. One patient taking nifedipine, and none taking ketanserin withdrew because of side-effects. The tolerability of the two drugs was broadly similar. 4. Ketanserin treatment was associated with significant changes in supine pulse rate (-8 beats min-1, P less than 0.05) and corrected QT interval (+27 ms, P less than 0.05). Nifedipine treatment had no effect on these variables. The change in pulse rate was significantly different between the groups. 5. In patients treated with a diuretic and beta-adrenoceptor blocker who required additional treatment ketanserin was significantly inferior to nifedipine.
mesh_terms: D000319:Adrenergic beta-Antagonists / Q000008:administration & dosage / Q000627:therapeutic use*; D000328:Adult; D000368:Aged; D001581:Benzothiadiazines; D001794:Blood Pressure / Q000187:drug effects; D001835:Body Weight / Q000187:drug effects; D002986:Clinical Trials as Topic; D003692:Delayed-Action Preparations; D004232:Diuretics; D004311:Double-Blind Method; D004359:Drug Therapy, Combination; D005260:Female; D006801:Humans; D006973:Hypertension / Q000188:drug therapy* / Q000503:physiopathology; D007650:Ketanserin / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D008297:Male; D008875:Middle Aged; D009543:Nifedipine / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D010349:Patient Compliance; D011674:Pulse / Q000187:drug effects; D011897:Random Allocation; D049993:Sodium Chloride Symporter Inhibitors / Q000008:administration & dosage / Q000627:therapeutic use*
chemical_list: D000319:Adrenergic beta-Antagonists; D001581:Benzothiadiazines; D003692:Delayed-Action Preparations; D004232:Diuretics; D049993:Sodium Chloride Symporter Inhibitors; D007650:Ketanserin; D009543:Nifedipine