NHS medicines information on gabapentin – what it's used for, side effects, dosage, and who can take it. Gabapentin is a prescription medicine used to treat seizures, pain after shingles, restless legs syndrome, and off-label uses. Learn about side effects, dosage, uses, warnings, interactions, and brand differences. Gabapentin is an anticonvulsant medication prescribed for a variety of conditions. Learn about its uses, side effects, and what you should know if you've been prescribed this medication. Gabapentin is a prescription medication known as a gamma aminobutyric acid (GABA) analogue. GABA reduces the excitability of nerve cells (neurons) in the brain, which play a role in seizures and the transmission of pain signals. Gabapentin capsules, tablets, and oral solution are used along with other medications to help control certain types of seizures in people who have epilepsy. Gabapentin is used to help control partial seizures (convulsions) in the treatment of epilepsy. This medicine cannot cure epilepsy and will only work to control seizures for as long as you continue to take it. Learn about the side effects of gabapentin, from common to rare, for consumers and healthcare professionals. In the US, gabapentin is indicated for the treatment of postherpetic neuralgia and as an adjunctive therapy in the treatment of partial-onset seizures without secondary generalization in people with epilepsy. [7] Overview: Gabapentin is used to treat certain people with seizures or nerve pain. Common side effects may include dizziness, sleepiness, or trouble with balance or coordination. Serious side. While it can be highly effective and even life-changing for some, gabapentin can also cause side effects, carry risks and is sometimes misused.