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
Galactorrhea may be associated with the use of all the following drugs except - 
Select and explain. 
A. Methyldopa, B. Tricyclic antidepressants, C. Pyridoxine, D. Phenothiazine
C: Pyridoxine
Answer: C: Pyridoxine 
Explanation: 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. 
These dopamine antagonists elevate prolactin concentrations and result in galactorrhea.