Gabapentin: Uses, Side Effects, Dosages, Interactions & More

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What is gabapentin?

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 mirrors the effects of GABA calming excited neurons.

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Gabapentin is in a class of medications called anticonvulsants.

What are the brand names of gabapentin?

Gabapentin is available as both a brand name product and a generic product (chemically the same, usually lower cost than the brand name product). Brand names of gabapentin include Horizant®, Gralise® and Neurontin®.

What is gabapentin approved for?

Gabapentin is used to:

  • Prevent and control partial seizures. Gabapentin can be used in adults and children age 3 and older who have partial seizures.
  • Relieve nerve pain following shingles in adults. Shingles is a painful rash that develops many years after you've had chickenpox. The virus that causes chickenpox stays dormant in a portion of your spinal nerve root called the dorsal root ganglion. For whatever reason, this otherwise dormant virus gets reactivated — usually by stress — causing a shingles rash. Nerve pain following a case of shingles is called postherpetic neuralgia (PHN).
  • Treat moderate-to-severe primary restless legs syndrome.

The branded gabapentin products Neurontin and Gralise are approved for partial seizures and PHN. The branded gabapentin enacarbil product Horizant is approved for restless legs syndrome and PHN.

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