It is an antiepileptic medication. When given for epilepsy, it is believed to work by reducing the abnormal electrical activity in the brain, thus preventing seizures. It is also used to treat nerve pain where it blocks pain by interfering with pain signals travelling through the damaged nerves and the brain. For treatment of anxiety, it is believed to work by stopping the release of certain chemical messengers (neurotransmitters) that make you feel anxious.

Blurred vision, Difficulty in paying attention, Dizziness, Dryness in mouth, Edema (swelling), Sleepiness, Weight gain