penbutolol

penbutolol /pen·bu·to·lol/ (pen-bu´tah-lol) a beta-adrenergic blocking agent with intrinsic sympathomimetic activity; used as the sulfate salt in the treatment of hypertension.

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penbutolol (penbū´tlôl),

n brand name: Levatol;
drug class: nonselective β-adrenergic blocker;
action: competitively blocks stimulation of β-adrenergic receptors within the heart and decreases renin activity, all of which may play a role in reducing systolic and diastolic blood pressure; inhibits β₂ receptors in the bronchial system;
uses: hypertension alone or with thiazide diuretics.