Carbamazepine is an anticonvulsant and specific analgesic used in the treatment (pain relief) of trigeminal neuralgia in cases of epilepsy. The drug appears to act by reducing polysynaptic responses and blocking the post-tetanic potentiation. This drug is very specific and can cause confusion, restlessness, and nervousness in adults and may have affects on the cardiovascular system. Side effects can be severe and should be closely monitored. The more serious include black and tarry stools, blood in the urine or stools, joint pain, darkening of urine, and nosebleeds or unusual bleeding. Overdose can cause spasms, convulsions, dizziness, and irregular heartbeat.