In recommending treatment for your carcinoid patient, you will consider all of the following except: (A) Cyproheptadine, (B) Ketanserin, (C) Methysergide, (D) Sumatriptan
Answer is D. All of the drugs listed have significant blocking effects on 5HT receptors except sumatriptan, which is an agonist at 5HT1 receptors.