This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Depolarising Neuromuscular Blocking Agents, Subject name: Anaesthesia
[{'content': 'Phase II block is seen in \nSelect and explain. \nA. Halothane, B. Ether, C. D-tubocurare, D. Suxamethonium', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e. . Suxamethonium Suxamethonium causes Biphasic Block, with dose more than 500mg. Phase I block - Features of classical depolarization block Phase II block - Results from desensitization of receptor to acetylcholine and resembles competitive block and partially antagonized by anticholinesterase.Other frequently asked facts about SuccinylcholineIt is a non-competitive muscle relaxant and has overall shortest duration of action d/t rapid hydrolysis by Pseudocholinesterase.It causes malignant hyperthermia*.It increases muscle tone and causes muscle rigidity.It causes hyperkalemia* in * ParaplegiaTetanusBumIt increases intraocular pressure and intra-abdominal pressure.", 'role': 'assistant'}]