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  • drugs
  • Digoxin, calcium channel blocking drugs and beta-adrenergic blocking agents provide little benefit, except in the subgroup of restrictive cardiomyopathy with atrial fibrillation. (wikipedia.org)
  • Alpha-1 blockers (also called alpha-adrenergic blocking agents) constitute a variety of drugs that block alpha-1-adrenergic receptors in arteries, smooth muscles, and central nervous system tissues. (wikipedia.org)
  • oral
  • Phenoxybenzamine is a long-acting, adrenergic, alpha-receptor blocking agent which can produce and maintain "chemical sympathectomy" by oral administration. (pharmacycode.com)
  • In the United States, this agent is only available in the oral form and is typically given in hospital settings. (wikipedia.org)