A young adult client diagnosed with bipolar disorder has been managing the disorder effectively with medication and treatment for several years. The client suddenly becomes manic. The nurse reviews...

A young adult client diagnosed with bipolar disorder has been managing the disorder effectively with medication and treatment for several years. The client suddenly becomes manic. The nurse reviews the client's medication record. Which of the following medications may have contributed to the development of his manic state?

1. Amitriptyline.

2. Prednisone.

3. Buspirone.

4. Gabapentin.