<prompt> A person taking tricyclic antidepressants presents with blurred vision and dry mouth. These adverse effects result due to blockade of:M3 muscarinic receptorsGABAA receptorsH1 histamine receptors5HT2 receptors  <response>: Ans. A M3 muscarinic receptorsRef: KDT 8e p486Anticholinergic adverse effects of TCAs include dry mouth, constipation, blurring of vision, urinary retention, etc. 