Which medication is used for treating seizures and also functions as a mood stabilizer?

Tegretol, or carbamazepine, is an anticonvulsant medication that is primarily used to treat epilepsy by stabilizing electrical activity in the brain. Additionally, it has mood-stabilizing properties, making it beneficial for individuals with bipolar disorder. Its dual action as both a treatment for seizures and a mood stabilizer distinguishes it from other options in this question.

While Phenobarbital is also used to control seizures, it does not have the mood-stabilizing properties that Tegretol has. Digoxin is primarily used to treat various heart conditions and does not have a role in seizure management or mood stabilization. Lithium is well-known for its mood-stabilizing effects but is not used in the treatment of seizures. Thus, Tegretol stands out as the correct choice because of its efficacy in both managing seizure disorders and providing mood stability.