Dry mouth during antidepressant therapy is caused by blockade of -
Muscarinic acetylcholine receptors
Serotonergic receptors
Dopaminergic receptors
GABA receptors
Ans. is 'a' i.e., Muscarinic acetylcholine receptors "Blurred vision, dry mouth, urinary hesitancy or retention, and constipation represent the most common antimuscarinic complaints".