the antihypertensive effects of oral labetalol , a new alpha- and beta-adrenergic blocking agent , and metoprolol , a relatively beta1 selective adrenergic blocker , were evaluated in 91 patients with mild to moderate hypertension ( standing diastolic blood pressure of 90 to 115 mm hg ) in a double-blind parallel group multicenter clinical trial .
C0025859
metoprolol
C0020538
hypertension