This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gastrointestinal tract, Subject name: Pharmacology
[{'content': 'All of the following drugs intensify gastrointestinal motility Except \nSelect and explain. \nA. Papaverine, B. Metoclopramide, C. Domperidone, D. Cisapride', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Papaverine an opioid decreases motility Prokinetic drugs are 5-HT3 antagonists (granisetron, ondansetron, and tropisetron), 5-HT 4 -receptor agonists (Cisapride, Mosapride, Tegaserod), D 2 -receptor antagonists (Metoclopramide and domperidone), Cholinomimetic agonists (bethanechol, Neostigmine) Ref:Katzung 13th edition pg 531', 'role': 'assistant'}]