This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous system, Subject name: Pharmacology
[{'content': 'which of the following is not a side effect of amitriptyline: \nSelect and explain. \nA. Constipation, B. Fine tremors, C. Weight loss, D. Dry mouth', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ref: KDT 6/e p444 'Weight gain ( not weight loss) in seen with TCAs.", 'role': 'assistant'}]