This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autonomic nervous system, Subject name: Pharmacology
[{'content': 'Sho acting anticholinesterase drug is \nSelect and explain. \nA. Edrophonium, B. Neostigmine, C. Dyflos, D. Ectothiophate', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Refer kDT 6/e p 101 Edrophonium is the only sho-acting anticholinesterase available; it is a synthetic quaternary ammonium compound. The drug competes with acetylcholine and binds by a non-covalent bond to acetylcholinesterase at the anionic site. The recommended dose for antagonism of neuromuscular block is 0.5-1 mg kg-1.', 'role': 'assistant'}]