Glycopyrrolate is preferred over atropine for premedication in anesthesia to reduce secretions because:

• A Glycopyrrolate is a quaternary amine that does not cross the BBB, avoiding CNS and tachycardia side effects ✓
• B Glycopyrrolate crosses the BBB and provides better sedation
• C Glycopyrrolate has a shorter duration of antisecretory action
• D Glycopyrrolate selectively blocks M1 receptors in salivary glands

Explanation

Glycopyrrolate is a quaternary ammonium antimuscarinic that does not cross the blood-brain barrier, so it lacks the central anticholinergic effects (confusion, sedation, delirium) of atropine. It also causes less tachycardia than atropine while providing potent antisecretory effects — important for reducing aspiration risk during anesthesia. Its longer duration of action (2–4 hours) compared to atropine is another advantage in this setting.

Reference: KD Tripathi, Essentials of Medical Pharmacology, 8th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.