Paper I
2019 February (2010 Scheme) · 40 marks · 120 min

Question

Atropine as antisecretory agent

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Answer

Atropine competitively blocks M3 muscarinic receptors on exocrine glands (salivary, bronchial, sweat), preventing acetylcholine-mediated secretion. This antisecretory action reduces salivary and bronchial secretions, making it useful as a preanaesthetic medication (to reduce airway secretions during intubation and prevent aspiration) and in the management of organophosphorus poisoning (where it reduces excess muscarinic secretions).

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