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neurontin

Neurontin (Gabapentin) is an anti-epileptic agent used to treat Bipolar Disorder, Partial Epilepsies, Phobic Disorders, Postherpetic Neuralgia.

Gabapentin · by Parke Davis

Available as a generic: Gabapentin

Not yet rated· sourced from the FDA label
Rated against independent regulatory sources·Last updated June 7, 2026·How we rate
Verified againstopenFDANIH DailyMedRxClass

Key facts

Active ingredient
Gabapentin
Form
Capsule, Solution, Tablet
Strength
Gabapentin 600MG
Type
Prescription (Rx)
Brand or generic
Brand-name
Manufacturer
Parke Davis
Half-life
about 5 to 7 hours in adults with normal kidney function (how long it stays in your system)
What the pharmacy pays
~$1.22 for 30 — not your price
FDA application
NDA021397

How long does Gabapentin stay in your body?

The elimination half-life of gabapentin is about 5 to 7 hours in adults with normal kidney function — the time it takes the body to clear about half of it. As a rule of thumb, a medicine is mostly gone after roughly 4 to 5 half-lives, though this varies from person to person with age and kidney or liver function. Gabapentin is cleared unchanged by the kidneys and is not appreciably metabolized, so there is no active metabolite and the half-life does not change with dose. However, it lengthens dramatically as kidney function drops — from about 6.5 hours to roughly 52 hours in kidney impairment, and up to about 132 hours in people with no kidney function.

This is general information, not medical advice. It doesn’t tell you when a drug test would read negative (tests detect substances for different, often longer, windows) or when it’s safe to take another dose — ask your pharmacist or prescriber. Source: NEURONTIN- gabapentin capsule (DailyMed FDA label), Clinical Pharmacology / Pharmacokinetics.

Drug class

How this class works, per Seizure Medications — StatPearls, NCBI Bookshelf (NIH).

May treat (source: NIH RxClass)

See how Neurontin ranks — best-rated anti-epileptic agent for:

Dosage forms

Capsule, Solution and Tablet

The forms currently marketed in the U.S., per the FDA National Drug Code Directory.

Ways to save

Ask for the generic

Same active ingredient, far cheaper. Is there a generic? →

Request a 90-day supply

Bulk fills usually lower the per-dose price vs monthly refills.

Use copay cards

Manufacturer copay cards & patient-assistance programs — especially for brand drugs.

Compare alternatives

A same-class option may cost less. See alternatives →

Frequently asked questions

What does Neurontin treat?
Neurontin (Gabapentin) may be used to treat bipolar disorder, partial epilepsies, phobic disorders, postherpetic neuralgia, based on NIH RxClass drug-classification data (conditions a drug may treat — not a verbatim copy of the FDA-approved label). This is general reference, not medical advice.
How does Neurontin work?
Neurontin is a anti-epileptic agent. Anti-epileptic (anticonvulsant) drugs calm the abnormal, excessive electrical activity that triggers seizures. They do this by stabilizing overactive sodium or calcium channels in nerve cells, boosting the brain's natural calming chemical GABA, or dampening excitatory signals, which makes nerves less likely to fire uncontrollably.
How much does Neurontin cost?
Nobody can tell you what you will pay — your price is set by your insurer's formulary, your deductible and the pharmacy's markup, and none of those are published. What IS published is what the pharmacy paid to acquire it: about $1.22 for 30, per the CMS NADAC survey. Treat that as the floor, not the quote — ask the pharmacist for the cash price as well as your copay, because for cheap generics the cash price often wins.
Is there a coupon or discount for Neurontin?
pharmaranks is an independent ratings site, not a pharmacy — we don't issue coupons or sell Neurontin. To pay less, ask your prescriber or pharmacist whether a generic equivalent exists, check the manufacturer's copay/savings card and patient-assistance program, and compare a pharmacy discount card against your insurance copay. Prices vary by pharmacy, insurance, and location, so always confirm at the counter. This is general reference, not medical or financial advice.
Who makes Neurontin?
Neurontin is marketed by Parke Davis. You can see Parke Davis's full profile, rating, and other products on pharmaranks.
Is Neurontin a brand-name or generic drug?
Neurontin is a brand-name product with the active ingredient Gabapentin. Lower-cost generic equivalents containing Gabapentin are available — ask your pharmacist.
Is Neurontin available over the counter?
No. Neurontin is a prescription (Rx) medication in the US — you need a prescription from a licensed clinician (in person or via telehealth); it isn't sold over the counter. For some conditions there are OTC alternatives — ask your pharmacist.
What forms does Neurontin come in?
Neurontin is currently marketed as capsule, solution and tablet, per the FDA's National Drug Code Directory.
What class of drug is Neurontin?
Neurontin is classified as anti-epileptic agent, per the FDA's Established Pharmacologic Class.
Is Neurontin FDA-registered?
Neurontin is on record with the U.S. FDA under application number NDA021397. You can verify this on its official FDA label.

Information is sourced from public FDA regulatory data. Provided for general reference only — not medical advice. Always consult a licensed professional and the current prescribing information.

What people report to the FDA about GABAPENTIN

The FDA Adverse Event Reporting System (FAERS) collects reports from patients and clinicians. It holds 299,862 reports naming GABAPENTIN — the active ingredient in Neurontin, and the FDA flagged 64% of those reports as serious. The effects reported most often — leaving out reports about overdose, misuse or the condition being treated, which dominate the raw list for common medicines:

  • fatigue21,341 reports
  • nausea18,822 reports
  • diarrhoea15,569 reports
  • headache14,738 reports
  • dizziness13,248 reports
  • fall12,701 reports
  • dyspnoea11,786 reports
  • vomiting10,034 reports

Read these as a signal, not a rate. A report does not mean GABAPENTIN caused the effect — anyone can file one, and many describe people taking several medicines for several conditions. Crucially there is no denominator: FAERS does not record how many people took the drug, so these counts cannot be turned into “X% of patients” — a bigger number often just means a more widely used or more talked-about drug. Duplicates exist, and publicity drives reporting. For what is actually established, read the FDA label.

Source: openFDA drug/event (FAERS), retrieved September 25, 2026.

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