Pharmacology Which of the following is true regarding 5-HT derivatives: March 2009 A Cisapride is selective 5-HT4 antagonist B Ondansetron is a 5-HT3 agonist C Cyproheptadine is 5-HT2A agonist D Sumatriptan action is agonistically 5-HT 1B/1D receptor mediated 💡 Explanation Which of the following is true regarding 5-HT derivatives: March 2009 ✓ Correct Answer: D. Sumatriptan action is agonistically 5-HT 1B/1D receptor mediated