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n.
a beta blocker drug commonly used to treat high blood pressure, angina pectoris, and irregular heart rhythms. It is administered by mouth. Possible side-effects include breathing difficulty, especially in asthmatics, and cold hands and feet. Trade name: Sectral.
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ac·e·bu·to·lol (as″ə-buґtə-lol) a cardioselective β1-adrenergic blocking agent with intrinsic sympathomimetic activity; its uses are similar to those of propranolol.Medical dictionary. 2011.