#beta_blocker__beta-adrenergic_blocker__beta-adrenergic_blocking_agent  any of various drugs used in treating hypertension or arrhythmia; decreases force and rate of heart contractions by blocking beta-adrenergic receptors of the autonomic nervous system
  supertype:  #blocking_agent__blocker  a class of drugs that inhibit (block) some biological process
  subtype:  #acebutolol__Sectral  an oral beta blocker (trade name Sectral) used in treating hypertension
  subtype:  #atenolol__Tenormin  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.)
  subtype:  #carvedilol  beta blocker that can reduce the progression of heart failure in individuals whose disease is not advanced
  subtype:  #esmolol__Brevibloc  intravenous beta blocker (trade name Brevibloc) that acts for only a short time; used primarily for cardiac arrhythmias
  subtype:  #metoprolol__Lopressor  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.)
  subtype:  #nadolol__Corgard  a beta-adrenergic blocking agent (trade name Corgard) that is used to treat hypertension and angina
  subtype:  #pindolol__Visken  an oral beta blocker (trade name Visken) used in treating hypertension
  subtype:  #propanolol__Inderal  the first beta blocker (trade name Inderal) used in treating hypertension and angina pectoris and essential tremor
  subtype:  #timolol__Blocadren  a beta blocker (trade name Blocadren) administered after heart attacks

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