About Gabapentin / Neurontin (Generic) Gabapentin pills, needles, and oral medication are used in people with epilepsy to help control some forms of seizures. Gabapentin pills, tablets, and oral medication can also be used to treat postherpetic neuralgia (PHN; swelling, sharp discomfort, or aches that may last for months or years after a shingle attack). One can buy gabapentin...