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Labetalol compared with propranolol in the treatment of black hypertensive patients



Labetalol compared with propranolol in the treatment of black hypertensive patients



Journal of Clinical Hypertension 3(3): 294-302



A double-blind parallel group study was conducted to examine the effects of oral labetalol, in doses from 100 to 800 mg BID, and propranolol, 40 to 320 mg, in patients with mild to moderate hypertension. The doses of labetalol (n = 74) and propranolol (n = 79) were titrated weekly to achieve a sitting diastolic blood pressure (DBP) of < 90 mmHg or at least a 10-mmHg decrease from placebo baseline on two consecutive visits. A 2-month fixed-dose maintenance phase followed in which a diuretic could be added if the sitting DBP was .gtoreq. mmHg on maximum doses of either drug. BP and heart rate were measured 8-12 hours after a dose in the sitting and standing positions. Labetalol was significantly more effective at the end of monotherapy than propranolol was in lowering both the sitting (p < .05) and standing (p < .04) DBP. The reduction in the systolic, although more prononced for those on labetalol, was not significantly different; 53% of patients had a "good" response to labetalol compared with 30% of the propranolol group. Propranolol significantly (p < 0.01) lowered heart rate compard with labetalol. Nine patients in the labetalol group and 10 in the propranolol group required a diuretic. The decrease in BP after the addition of a diuretic was comparable. Changes in plasma lipids were not significant, but HDL increased 9% with labetalol and decreased 2% with propranolol. Triglycerides increased 25% with labetalol and 31% with propranolol. These results suggest that labetalol may be a better choice than propranolol for the treatment of black hypertensive patients if beta-adrenergic inhibition therapy is indicated.

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Accession: 005787148

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PMID: 3312502


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