This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
[{'content': 'Galactorrhea may be associated with the use of all the following drugs except - \nSelect and explain. \nA. Methyldopa, B. Tricyclic antidepressants, C. Pyridoxine, D. Phenothiazine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Lactation in the absence of breastfeeding is known as galactorrhea. Drugs causing galactorrhea are dopamine antagonists like antipsychotics (phenothiazines, butyrophenones), antidepressants, antiemetics and dopamine-depleting drugs like reserpine, methyldopa. \nThese dopamine antagonists elevate prolactin concentrations and result in galactorrhea.', 'role': 'assistant'}]