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Q-144 Each one of the following is a feature of organophosphate poisoning, except: A. B. C. D. E. Defecation Mydriasis Salivation Lacrimation Urination ANSWER: Mydriasis EXPLANATION: ORGANOPHOSPHATE INSECTICIDE POISONING One of the effects of organophosphate poisoning is inhibition of acetylcholinesterase Features can be predicted by the accumulation of acetylcholine (mnemonic = SLUD) • Salivation • Lacrimation • Urination • Defecation/diarrhoea • cardiovascular: hypotension, bradycardia • also: small pupils, muscle