This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney, Subject name: Pharmacology
[{'content': 'Not a side effect of cimitidine is \nSelect and explain. \nA. Impotence, B. Gynaecomastia, C. Atrophic gastritis, D. Galactorrhea', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Common side effects of Tagamet include: headache, dizziness, drowsiness, depression, agitation, breast swelling or tenderness (in men), joint or muscle pain, skin rash,', 'role': 'assistant'}]