This course provides a clear, practical breakdown of how anticholinergic drugs work at both muscarinic and nicotinic receptors—and why that matters in anesthesia. You’ll learn to distinguish antimuscarinic from antinicotinic actions, understand how competitive blockade of acetylcholine alters organ physiology, and anticipate the widespread systemic effects these agents produce. With special emphasis on vulnerable populations like the elderly, this course equips you to recognize adverse reactions, avoid contraindications, and apply anticholinergics safely and effectively across the perioperative setting.