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
Drug of choice for rapid cycling MDP is 
Select and explain. 
A. Lithium, B. Carbamazepine, C. Sodium valporate, D. Haloperidol
C: Sodium valporate
Answer: C: Sodium valporate 
Explanation: C i.e. Sodium Valproate Rapid Cycling MDP - The patient must have at least 4 episodes within 12 months of mood disturbance (that meet criteria of major depressive, manic, hypomanic or mixed episode). - It is usually due to use of conventional antidepressant especially tricyclic & presence of hypothyroidism. So antidepressants are better avoided but antipsychotics may be used.