Oral lichenoid drug reaction by lithium in a patient with bipolar disorder.

Bipolar disorder (BD) is a psychiatric disease characterized by recurrent and alternated episodes of depression and mania. For the treatment of BD, anticonvulsants drugs as lithium, carbamazepine and oxcarbazepine can be used. These drugs can be associated with potential adverse effects: weight gain, tremors, thyroid abnormalities, and cognitive, gastrointestinal, cardiac or dermatological problems. We describe a case of BD with oral lichenoid drug reaction probably because of the mood stabilizers.