<prompt> Drug of choice for bipolar syndrome:LithiumImipraminePhenytoinClozapine  <response>: Ans. A. LithiumLithium is mood stabilizer which is drug of choice for bipolar syndrome. It has narrow therapeutic index. 8-1.2ngdl. It is known to cause tremor, nephrotoxicity, hypothyroidism and Ebstein anomaly. Other drugs like SSRI, valproate, carbamazepine, lamotrigine can also be given in bipolar disease. 