Medicine Retroperitoneal fibrosis is seen with which 5HT1 and 5HT2 receptor antagonist: March 2013 (d) A Ketanserin B Cyproheptadine C Methysergide D All of the above 💡 Explanation Retroperitoneal fibrosis is seen with which 5HT1 and 5HT2 receptor antagonist: March 2013 (d) ✓ Correct Answer: C. Methysergide