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 serotonin-norepinephrine reuptake inhibitor? \nSelect and explain. \nA. Venlafaxine, B. Duloxetine, C. Milnacipran, D. Tianeptin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ref: KDT 8th ed *Tianeptin enhances the reuptake of serotonin rather than inhibiting it whereas the other drugs mentioned in the options inhibit the reuptake of serotonin and nor-epinephrine.', 'role': 'assistant'}]