Gabapentin Orion 100 mg capsules and packaging in Sweden.
W.carter · CC BY-SA 4.0
About Gabapentin
Gabapentin is an anticonvulsant also used for specific nerve-pain conditions; it is not an opioid.
Also searched as: Neurontin · Gralise
Available strengths
Strength is the amount in a tablet, capsule, liquid or patch. Different formulations are listed separately.
| Product & formulation | Strengths |
|---|---|
| Neurontin / gabapentin Immediate-release oral capsule | 100 mg · 300 mg · 400 mgProduct label · Checked 2026-10-31 |
| Neurontin / gabapentin Immediate-release oral tablet | 600 mg · 800 mgProduct label · Checked 2026-10-31 |
| Neurontin / gabapentin Oral solution | 250 mg / 5 mL (50 mg/mL)Product label · Checked 2026-10-31 |
Dosages in the product label
Neurontin immediate release — Postherpetic neuralgia
Population: Adults
Label titration: day 1, 300 mg once; day 2, 300 mg twice; day 3, 300 mg three times. May be titrated to 1,800 mg/day in 3 divided doses.
Kidney function can require substantially lower doses and different intervals. This does not describe modified-release products.
Prescribing information · Checked 2026-10-31
Buy Gabapentin: pricing & legal access
Gabapentin online: availability & product information
Saved U.S. price estimates from Drugs.com for the exact products and quantities below. These are dated estimates, not live pharmacy quotes or insurance copays. Discounts and local availability vary.
| Product / strength | Quantity | Price (USD) |
|---|---|---|
| Generic gabapentin 300 mg Oral capsule | 90 capsules | $8.68 HEB via WellRx, listed on Drugs.com; discount-program price Drugs.com price guide Checked 2026-10-31 |
Prices refer to medication only; consultation, administration and monitoring costs may be additional. Prescription products require a valid prescription and a licensed pharmacy. Check the exact formulation before comparing offers.
Gabapentin information
Uses and formulations
Used for partial seizures and postherpetic neuralgia. Related extended-release products have different indications and are not automatically interchangeable.
Sources: MedlinePlus — Gabapentin
Side effects and serious risks
Dizziness, sleepiness and poor coordination can occur. Mood changes and breathing problems, especially with other depressants, require assessment.
Sources: MedlinePlus — Gabapentin
Dosage and directions
Kidney function can affect the prescription. Do not abruptly stop seizure treatment or substitute formulations without instructions.
Sources: MedlinePlus — Gabapentin
Interactions and precautions
Review opioid and sedative use. Antacids can affect absorption, so ask the pharmacist about product-specific spacing.
Sources: MedlinePlus — Gabapentin
Pharmacology and mechanism
Gabapentin interacts with the alpha-2-delta subunit of voltage-gated calcium channels. Despite its name and chemical relationship to GABA, it is not a direct benzodiazepine-like GABA receptor agonist.
Formulations and product identification
The active ingredient alone does not describe a finished product. These distinctions matter when reading a label or comparing prescriptions.
| Product or formulation | Important distinction |
|---|---|
| Immediate-release gabapentin | Used for particular seizure and nerve-pain indications. |
| Other release formulations | May differ in approved uses and absorption. |
Monitoring and treatment follow-up
Kidney function affects elimination. Dizziness, gait problems and sleepiness may affect daily function, especially when other sedating medicines are also used. A formulation change can require different instructions.
Dependence and stopping treatment
Abrupt changes after regular use can cause problems, including loss of seizure control in patients treated for epilepsy. Misuse has been reported, but physiological dependence, therapeutic use and addiction are different clinical questions.
How it differs from related medicines
Pregabalin is a separate gabapentinoid, not a brand of gabapentin. A numerical dose cannot be transferred between them. Neurontin and modified-release gabapentin products also should not be assumed to have identical directions.
Sources and editorial notes
Prepared by DrugRX using the references linked below. Sources were consulted on 2026-10-31. This page has not been independently reviewed by a clinician. Research findings, medication approval and legal permission are separate questions.
- MedlinePlus — Gabapentin
- DailyMed — Neurontin prescribing information
- Drugs.com — gabapentin price guide
Legal information is a dated U.S. reference. Product rules and local laws may change. Where the evidence does not establish a dose, interaction profile or price, the page states that limitation.