<prompt> Organophosphorous compounds act by which of the following?Stimulating Acetyl choline esteraseInhibiting Acetyl choline esteraseBlocking Acetyl choline receptorsNone  <response>: Ans. b Inhibiting Acetyl choline esterase. Ref. Parikh, Textbook of FMT, 5th892ORGANOPHOSPHOROUS COMPOUND POISONING It produces cholinergic syndrome muscarinic and nicotinic effects. Muscarinic effects include:- bradycardia, bronchorrhoea, lacrimation, sweating, hyperperistalsis, wheezing, salivation, incontinence and miosis pin point pupils.- Hint: Salivation Lacrimation Urinary incontinence Decreased heart rate GI symptoms Excessive sweating and elation Nicotinic effects include:- initial hypertension,- tachycardia,- fasciculations,- muscle weakness,- agitation and anxiety. Red tears is also its feature. 