The drug possessing antagonistic action at histamine, serotonin and muscarinic receptors is:: (A) Promethazine, (B) Terfenadine, (C) Cyproheptadine, (D) Hydroxyzine
Answer is C. -Cyproheptadine blocks 5HT2A, H1 and muscarinic receptors. -It increases appetite and can be used to promote weight gain in children.