Antiemetic effect of Metoclopromide is mainly due to its action as: (A) 5HT3 antagonist, (B) D2 antagonist, (C) M3 antagonist, (D) 5HT4 agonist
Answer is B. Antiemetic effect of Metoclopramide is because of D2 antagonism > 5HT3 antagonism.
Prokinetic effect is due to 5HT4 agonism.