Zeptol CR 200mg Tablet contains Carbamazepine, which is an anticonvulsant medication. It's used to treat epilepsy (fits or seizures) and trigeminal neuralgia (pain in the face). It can also be used to manage bipolar disorder symptoms if other medications are ineffective. Bipolar disorder (also known as manic depression) is a mental illness characterized by recurrent episodes of mania (sudden unusually high levels of happiness) and anxiety.