Metoprolol is a cardioselective β1-adrenergic blocking agent used for acute myocardial infarction (MI), heart failure, angina pectoris and mild to moderate hypertension. It may also be used for supraventricular and tachyarrhythmias and prophylaxis for migraine headaches. Metoprolol is structurally similar to bisoprolol, acebutolol and atenolol in that it has two substituents in the para position of the benzene ring. The β1-selectivity of these agents is thought to be due in part to the large substituents in the para position. At low doses, metoprolol selectively blocks cardiac β1-adrenergic receptors with little activity against β2-adrenergic receptors of the lungs and vascular smooth muscle. Unlike propranolol and pindolol, metoprolol does not exhibit membrane-stabilizing or intrinsic sympathomimetic activity. Membrane-stabilizing effects are only observed at doses much higher than those needed for β-adrenergic blocking activity. Metoprolol possesses a single chiral centre and is administered as a racemic mixture. It comes as immediate-release and extended-release oral tablets, and extended-release oral capsules. It also comes in an injectable form that’s only given by a healthcare provider. Metoprolol oral tablets are available as the brand-name drugs Lopressor and Toprol XL. Generic drugs usually cost less than the brand-name versions. In some cases, they may not be available in all strengths or forms as the brand-name drugs. The two brand-name forms of metoprolol (as well as the different generic forms) are different versions of the medication. They’re both metoprolol, but they contain different salt forms. The different salt forms enable the drugs to be used to treat different conditions. Metoprolol succinate is an extended-release version of metoprolol, so it remains in your bloodstream for a longer time.
Metoprolol belongs to the class of medications called beta-blockers. Metoprolol is used to treat high blood pressure and prevent the symptoms of certain types of angina (chest pain). It is also used to help reduce the risk of death right after a heart attack. Metoprolol is also taken by people who have had a heart attack to reduce the risk of having another one. Metoprolol is often used in combination with other high blood pressure medications such as diuretics (water pills) when the use of one medication by itself is not enough to control blood pressure. This medication may be available under multiple brand names and/or in several different forms. Any specific brand name of this medication may not be available in all of the forms or approved for all of the conditions discussed here. As well, some forms of this medication may not be used for all of the conditions discussed here. The Patient Information Leaflet (PIL) is the leaflet included in the pack with a medicine. It is written for patients and gives information about taking or using a medicine. It is possible that the leaflet in your medicine pack may differ from this version because it may have been updated since your medicine was packaged.
Use other medications to relieve sudden attacks as directed by your doctor for example, nitroglycerin tablets placed under the tongue for chest pain, "triptan". Nov 9, 2015. Metoprolol Tartrate is the name of the medication. It comes in the form of a tablet, and should be. Metoprolol Tartrate 50mg NDC 57664-477.