Pharmacology General 8660b6e4 Most common adverse effect of colchicine - A Diarrhoea B Peptic ulcer C Dyspepsia D Pulmonary fibrosis High-Yield Explanation Ans. is 'a' i.e., diarrhoea "Nausea, vomiting, diarrhea and abdominal pain are the most common untoward effects of colchicine". - Goodman & Gilman