if you search med for nerve pain then visit our link. Gabapentin is an FDA-approved medication used to treat epilepsy. Gabapentin is a prescription medication known as a gamma-aminobutyric acid (GABA) analog. Gabapentin is used to help control partial seizures in the treatment of epilepsy. Gabapentin side effects are vision changes, clumsiness, unsteadiness, dizziness, drowsiness, and sleepiness.