Pharmacology General 28afc6c0 Most common side effect of 5-HT 3 antagonist drug alosetron is ? A Pulmonary fibrosis B Cardiac arhythymmias C Constipation D Headache High-Yield Explanation Ans. is 'c' i.e., Constipation Alosetron has sometimes caused fatal intestinal side effects including constipation and ischemic colitis.