<prompt> Dry mouth during antidepressant therapy is caused by blockade of -Muscarinic acetylcholine receptorsSerotonergic receptorsDopaminergic receptorsGABA receptors  <response>: Ans. is a i.e., Muscarinic acetylcholine receptors Blurred vision, dry mouth, urinary hesitancy or retention, and constipation represent the most common antimuscarinic complaints. 