<prompt> Drug NOT given in organophosphorous poisoning: September 2012AtropinePralidoximeActivated charcoalPhysostigmine  <response>: Ans. D i.e. Physostigmine Organophosphate poisoning It results from exposure to organophosphates OPs, which cause the inhibition of acetylcholinesterase AChE, leading to the accumulation of acetylcholine ACh in the body. The effects of organophosphate poisoning on muscarinic receptors are recalled using the mnemonic SLUDGEM: Salivation, Lacrimation, Urination, Defecation, Gastrointestinal motility, Emesis, miosis An additional mnemonic is MUDDLES: miosis, urination, diarrhea, diaphoresis, lacrimation, excitation, and salivation. Pyridostigmine is a parasympathomimetic and a reversible cholinesterase inhibitor. 