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: Psychiatry
[{'content': "A 38-year-old woman with bipolar disorder has been stable on lithium for the past 2 years. She comes to her psychiatrist's office in tears after a 2-week history of a depressed mood, poor concentration, loss of appetite, and passive suicidal ideation. Which of the following steps should the psychiatrist take next? \nSelect and explain. \nA. Sta the patient on a second mood stabilizer, B. Sta the patient on a long-acting benzodiazepine, C. Stop the lithium and sta an antidepressant, D. Sta an antidepressant and continue the lithium", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Pt has depression and psychotic symptoms, so treatment is antidepressant along with antipsychotic drugs', 'role': 'assistant'}]