Which of the following cholinomimetics activates both muscarinic and nicotinic receptors?: (A) Methacholine, (B) Bethanechol, (C) Pilocarpine, (D) Carbachol
Answer is D. Carbachol is a parasympathomimetic that mimicks the effect of Ach on both muscarinic and nicotinic receptors. It is a synthetic choline ester where others act on muscarinic receotors only. <img class="fr-fic fr-dib" style="width: 300px;" src=" />Ref: Katzung 13e pg:108