a class of drugs that inhibit (block) some biological process

an oral beta blocker (trade name Sectral) used in treating hypertension

an oral beta blocker (trade name Tenormin) used in treating hypertension and angina; has adverse side effects (depression and exacerbation of congestive heart failure etc.)

beta blocker that can reduce the progression of heart failure in individuals whose disease is not advanced

intravenous beta blocker (trade name Brevibloc) that acts for only a short time; used primarily for cardiac arrhythmias

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.)