text: An<unk>  agent is a member of a class of pharmaceutical compounds (such as Dicyclomine) which serve to reduce the effects mediated by acetylcholine in the central nervous system and peripheral nervous system.<unk> s are typically reversible competitive inhibitors of one of the two types of acetylcholine receptors, and are classified according to the receptors that are affected:
  antimuscarinic agents operate on the muscarinic acetylcholine receptors. (The majority of<unk> s are antimuscarinics.)
  antinicotinic agents operate on the nicotinic acetylcholine receptors.
option_0: Anticholinergic
option_1: Sympatholytic
option_2: Antagonist 
option_3: Anticoagulant
option_4: Nicotinic antagonist
option_5: Ganglionic blocker
option_6: Sympathomimetic amine
option_7: Alpha-adrenergic agonist