A rate control beta-blocker medication. See Medications.

beta blocker (trade name Lopressor) used in treating hypertension and angina and arrhythmia and acute myocardial infarction; has adverse side effects (depression and exacerbation of congestive heart failure etc.)

Metoprolol is a selective beta1 receptor blocker used in treatment of several diseases of the cardiovascular system. It is marketed under the brand name Lopressor® by Novartis, and Toprol-XL® (in the USA); Seleken® or Selokeen® (elsewhere); as Minax® by Alphapharm (in Australia), as Betaloc® by Astra Zeneca and as Corvitol® by Berlin-Chemie AG.

a cardiac antihypertensive drug.