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Metoprolol, sold under the brand names Lopressor and Toprol-XL among others, is a medication used to treat angina, high blood pressure and a number of conditions involving an abnormally fast heart rate. It is also used to prevent further heart problems after myocardial infarction and to prevent headaches in those with migraines. It is a beta blocker, specifically a selective competitive β1 receptor blocker, and is taken by mouth or is given intravenously.
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