FDA-filed SPL labeling · retrieved through openFDA

Gabapentin

Gabapentin is a nerve-pain and anti-seizure medicine used for nerve pain after shingles (postherpetic neuralgia) and, in some products, as add-on treatment for partial onset seizures in epilepsy; one extended-release brand is also used for restless legs syndrome.

Brand names GraliseHorizantNeurontinRelgaabiGabarone +1 more
Drug class ⓘ Decreased Central Nervous System Disorganized Electrical Activity
Rx Forms 5 Route Oral
Dr. Brian Staiger, PharmD, BCPS
Reviewed by Last reviewed Jul 10, 2026
🧬 Where this information comes from Click to expand

The clinical label records used on this page are FDA-filed Structured Product Labeling (SPL) retrieved through openFDA. We identified 452 clinical label sets within the page’s selected clinical scope after exact ingredient or ingredient-combination matching and applicable route/form matching. Forms, routes, brands, labelers, strengths, and NDC product-record counts are built separately from matching FDA National Drug Code Directory records. The linked DailyMed document is a representative official source for verification, not the page’s only clinical source. View the linked label on DailyMed →

At a glance
Linked label effectiveMay 12, 2026
Clinical labels in scope ⓘ452
AvailabilityRx
Earliest approval/marketing year ⓘ1992
FDA-listed product records ⓘ1,543
Boxed warningNone found in compared labels
How we combine label and product data →
✓No current FDA shortage listed · checked Oct 1, 2026 🚨Recall on record · 7
⭐ Gabapentin at a glance The quick version — the full detail is in the Patient Information Guide below.
💊
HelloPharmacist Editorial Team Bottom Line
Gabapentin is used for postherpetic neuralgia and, in many products, as add-on treatment for partial onset seizures in epilepsy. Horizant is also used for restless legs syndrome. It can cause drowsiness and dizziness, and it needs extra care with opioids, kidney problems and lung problems. Take it exactly as prescribed and don't stop it suddenly.
How we write & review this content — our editorial policy →

📖 Gabapentin: Patient Information Guide

A plain-language walkthrough of Gabapentin — what it treats, how it works, how it’s taken, side effects, warnings and interactions. Tap any section to expand it.

What Gabapentin is used for

▾

Gabapentin is used for these conditions, depending on the product:

  • Postherpetic neuralgia (nerve pain after shingles): Neurontin, Relgaabi, Gabarone, Horizant, Gralise, and gabapentin capsules, tablets and oral solution.
  • Partial onset seizures (add-on therapy) in adults and children 3 years and older with epilepsy: Neurontin, Relgaabi, Gabarone, and gabapentin capsules, tablets and oral solution.
  • Moderate-to-severe primary restless legs syndrome in adults: Horizant only.

How Gabapentin works

▾

Gabapentin is related to the brain chemical GABA but doesn't affect how GABA works. In lab studies, it binds tightly to the α2δ part of voltage-activated calcium channels on nerve cells. How this binding leads to pain relief and seizure control is not known.

How Gabapentin is taken (dosage)

▾

Gabapentin is taken by mouth as a capsule, tablet, extended-release tablet or oral solution. Standard products are usually taken a few times a day, and the dose is gradually raised. Doses are adjusted if your kidneys work less well.

  • Horizant: swallow whole with food. For restless legs syndrome it is taken once daily at about 5 PM.
  • Gralise: swallow whole, once daily with the evening meal.
  • Gralise and once-daily gabapentin tablets can't be swapped with other gabapentin products.
  • Don't stop suddenly, especially if you take it for seizures.

Follow your prescriber's directions and the label.

Gabapentin side effects in detail

▾

The most common side effects reported in studies were:

  • Dizziness
  • Sleepiness
  • Swelling of the hands, legs or feet
  • Unsteadiness or poor coordination
  • Tiredness
  • Involuntary eye movements
  • Dry mouth and blurred vision

Children 3 to 12 with epilepsy more often had viral infection, fever, nausea or vomiting, sleepiness and hostility. Seek help right away for allergic reactions, slowed breathing, or mood changes and thoughts of self-harm.

Gabapentin warnings and precautions

▾
  • Serious allergic reactions: DRESS (fever, rash, swollen glands, possible organ involvement) and anaphylaxis or angioedema (trouble breathing, swelling of lips, throat or tongue) can occur, even after the first dose or later in treatment.
  • Slowed breathing: can be life-threatening, especially with opioids or other sedating medicines or lung problems.
  • Drowsiness and dizziness: may impair driving and machinery use.
  • Stopping suddenly: may increase seizures.
  • Suicidal thoughts: seizure medicines raise this risk, so report mood changes.
  • Children 3 to 12 with epilepsy: behavior and mood changes can occur.

Gabapentin interactions: what it interacts with

▾

These are the key things to be careful with:

  • Opioids (morphine, hydrocodone, oxycodone, buprenorphine): raise the risk of dangerous sedation and slowed breathing.
  • Morphine: can raise gabapentin levels.
  • Hydrocodone: gabapentin can lower its levels.
  • Other sedating medicines: drowsiness can add up.
  • Maalox-type antacids: reduce absorption, so take gabapentin at least 2 hours later.

This is not a complete list of interactions. Always talk with your doctor or pharmacist before starting, stopping, or changing any medication.

Before taking Gabapentin

▾
  • Don't use it if you're allergic to gabapentin or its ingredients.
  • Kidney problems require dose adjustment; Gralise should not be used if kidney function is low or on hemodialysis.
  • Older adults need cautious dosing because kidney function often declines with age.
  • Pregnancy: animal studies showed harm. Use with opioids near delivery may cause newborn withdrawal. A pregnancy registry exists for those who take it.
  • Breastfeeding: gabapentin passes into breast milk.
  • Children: not established for postherpetic neuralgia, or for seizures under age 3.

Gabapentin overdose: if you take too much

▾

Overdoses up to 49 grams have caused double vision, slurred speech, drowsiness, lethargy and diarrhea, and all patients recovered with supportive care. Coma has been reported in people with chronic kidney failure. Call poison control at 1-800-222-1222; dialysis can remove gabapentin.

Pharmacokinetics: how your body processes Gabapentin

▾

Gabapentin is not appreciably metabolized. It is cleared by the kidneys unchanged, with a half-life of 5 to 7 hours. Absorption drops as the dose goes up, and food has only a slight effect. Clearance is lower in older adults and in people with kidney problems, and dialysis can remove it.

How to store Gabapentin

▾

Store NEURONTIN Tablets and Capsules at 25°C (77°F); excursions permitted between 15°C to 30°C (59°F to 86°F) . Store NEURONTIN Oral Solution refrigerated, 2°C to 8°C (36°F to 46°F).

📄 Written from Gabapentin’s FDA-approved label information, summarized in plain language with AI, and reviewed by our pharmacy team before publication. Every point is grounded in that labeling — nothing is invented. How we use AI →

106

Supplements & herbs that interact with Gabapentin

106 supplements and herbal products have documented interactions with Gabapentin in the licensed clinical database we use. Most are manageable — but your pharmacist should know about everything you take, including vitamins and herbals.

Severity mix
  • Major · 7
  • Moderate · 82
  • Minor · 17
1,4-BUTANEDIOL Major ACTIVATED CHARCOAL Major BEER Major GAMMA-HYDROXYBUTYRATE (GHB) Major KAVA Major L-TRYPTOPHAN Major WINE Major 5-HTP Moderate +98 more
Every supplement checked against Gabapentin — ranked by severity The full interaction hub: 7 major · 82 moderate · 17 minor · every one linked to its full report. Check Gabapentin against your exact supplements

Educational information from a licensed clinical database (Natural Medicines) — see our data sources & update cadence. Not medical advice: an interaction being documented does not mean it will happen to you; do not start or stop medications or supplements without professional guidance.

1

Nutrient depletion considerations

Gabapentin has been associated with lower levels of 1 nutrient in the clinical literature. This does not mean a deficiency will occur — it means these may be worth discussing with your pharmacist or healthcare provider, especially with long-term use.

VITAMIN K Insignificant Depletion
See the full Gabapentin nutrient depletion report

Educational information from a licensed clinical database (Natural Medicines) — not medical advice. Do not start or stop medications or supplements without professional guidance.

🩺 Gabapentin: pharmacist answers to common questions

Quick, plain-English answers to the questions patients ask most about Gabapentin — the kind of thing our pharmacy team would talk through with you at the counter.

What is gabapentin for?

▾
It's used for nerve pain after shingles (postherpetic neuralgia). Many gabapentin products are also used as add-on treatment for partial seizures in epilepsy. Horizant is also used for restless legs syndrome.

Will it make me drowsy?

▾
Dizziness and sleepiness are the most common side effects. Don't drive or use heavy machinery until you know how it affects you, because you may not judge your own impairment well.

Can I stop it when I feel better?

▾
Talk to your prescriber first. Stopping seizure medicines suddenly can increase seizures. Gralise should be changed or stopped gradually over at least a week.

Can I take it with other medicines?

▾
Tell me about any opioid or sedating medicine, because together they can slow breathing dangerously. If you use an antacid like Maalox, take gabapentin at least 2 hours after it.

What should I call my doctor about right away?

▾
Get emergency help for trouble breathing or swelling of the lips, tongue or throat. Call promptly for fever with rash or swollen glands, or for new or worsening depression or thoughts of self-harm.

Is it safe in pregnancy?

▾
Animal studies showed harm, and using it with opioids near delivery may cause withdrawal in newborns. Talk with your prescriber before changing anything, and ask about the pregnancy registry.

Is Gabapentin available over the counter?

▾
Gabapentin is dispensed by prescription according to its FDA labeling, so it isn't sold over the counter. Your prescriber and pharmacist will determine if it's appropriate for you.

When was Gabapentin first available?

▾
Gabapentin has been available in the United States since at least 1992, based on FDA approval history (Drugs@FDA) and product marketing records.

Who makes Gabapentin?

▾
Gabapentin is supplied by 155 manufacturers listed in the FDA NDC Directory, including Bryant Ranch Prepack, Remedyrepack Inc., A-S Medication Solutions.

💬 Answers drafted from Gabapentin’s FDA-approved label information, summarized in plain language with AI, and reviewed by our pharmacy team before publication. Grounded in that labeling — nothing is made up. How we use AI →

🧰 More about Gabapentin on HelloPharmacist

📊Gabapentin supplement interactions106 checked — ranked by severity 🌿Drug & Supplement CheckerGabapentin vs. vitamins & herbs 💬Ask a PharmacistFree answer, usually < 24h 🔎NDC & pricing lookupFind Gabapentin NDCs & costs 🅰️Browse Drugs A–ZLook up any medication

💊 Gabapentin forms and strengths (how it comes)

Gabapentin is available in 5 forms. Different forms and brands can have different approved uses, doses, schedules, and directions. Follow the instructions for your exact product, and do not switch forms without guidance from your prescriber or pharmacist.

Capsule

By mouth
Brands Neurontin Relgaabi
How this form is used
What it may be used for
  • Neurontin and Relgaabi are used for postherpetic neuralgia in adults.
  • Neurontin and Relgaabi are used as add-on therapy for partial onset seizures in people 3 years and older with epilepsy.
Important instructions
  • Neurontin and Relgaabi are taken by mouth, with the dose increased over the first few days for postherpetic neuralgia.
  • Neurontin and Relgaabi doses are adjusted for people with reduced kidney function.
Available strengths 4 strengths
100 mg 200 mg 300 mg 400 mg
948 FDA-listed product records ⓘ

Tablet

By mouth
Brands Gabarone Gralise Neurontin
How this form is used
What it may be used for
  • Gabarone and Neurontin are used for postherpetic neuralgia in adults.
  • Gabarone and Neurontin are used as add-on therapy for partial onset seizures in people 3 years and older with epilepsy.
  • Gralise is used only for postherpetic neuralgia.
Important instructions
  • Gralise is taken once daily with the evening meal and swallowed whole, not split, crushed or chewed.
  • Gralise is not a substitute for other gabapentin products.
  • Gralise should not be used if kidney function is low or on hemodialysis.
  • Gralise changes, reductions or stops should be done gradually over at least 1 week.
Available strengths 8 strengths
100 mg 300 mg 400 mg 450 mg 600 mg 750 mg
Show 2 more strengths Show fewer strengths
800 mg 900 mg
500 FDA-listed product records ⓘ

Oral solution

By mouth
Brands Neurontin
How this form is used
What it may be used for
  • Neurontin is used for postherpetic neuralgia in adults.
  • Neurontin is used as add-on therapy for partial onset seizures in people 3 years and older with epilepsy.
Important instructions
  • Neurontin is taken by mouth, and the dose is adjusted for reduced kidney function.
Available strengths 2 strengths
50 mg/mL 250 mg/5 mL
35 FDA-listed product records ⓘ

Extended-release tablet

By mouth
Brands Horizant
How this form is used
What it may be used for
  • Horizant is used for moderate-to-severe primary restless legs syndrome in adults.
  • Horizant is used for postherpetic neuralgia in adults.
Important instructions
  • Horizant is swallowed whole with food, not cut, crushed or chewed.
  • Horizant for restless legs syndrome is taken once daily at about 5 PM.
  • Horizant for postherpetic neuralgia is taken in the morning at first, then twice daily.
  • Horizant is not recommended for people who must sleep during the day and stay awake at night.
Available strengths 2 strengths
300 mg 600 mg
6 FDA-listed product records ⓘ

Oral suspension

By mouth
Available strengths 1 strength
250 mg/5 mL
5 FDA-listed product records ⓘ

📊 Gabapentin on the U.S. market: products, makers and brands

How Gabapentin appears in the FDA’s National Drug Code Directory — including its dosage forms, strengths, brand names, manufacturers, and FDA-listed product records. These are directory records, not sales or prescription volume.

5
Dose forms ⓘ
155
Manufacturers
7
Brand names
1,543
FDA-listed product records ⓘ
1992
First marketed ⓘ

FDA-listed product records by dose form (tablet variants merged) — FDA National Drug Code Directory. Record counts are not sales or prescription volume.

Also listed with the FDA, not a patient dose form: Powder (44) · Kit (3) · Crystal (2) — bulk drug substance sold to compounders/manufacturers and multi-item kits. These aren’t counted in the dose-form total above.

Bryant Ranch Prepack17%
Remedyrepack Inc.9%
A-S Medication Solutions5%
Proficient Rx LP5%
Aphena Pharma Solutions - Tennessee, LLC4%
NuCare Pharmaceuticals,Inc.4%
Other makers56%

Share of FDA-listed product records by manufacturer — FDA National Drug Code Directory. Record counts are not sales or prescription volume.

📈 How widely Gabapentin is used (Medicaid data)

A general measure of how commonly Gabapentin is prescribed, based on Medicaid — one of the largest public drug programs. The figure below is prescriptions filled in Q1–Q4 2025, summed across every form and brand of the drug.

Think of this as a proxy for how widely Gabapentin is used, drawn from freely available public data. Medicaid is just one program — these numbers don’t include Medicare, other government coverage, or commercial and cash-pay prescriptions, so real-world use is higher than what’s shown here.

11,834,341
Medicaid prescriptions filled (Q1–Q4 2025)
$171.9M gross Medicaid reimbursement (before mandatory rebates — net cost is lower)

How commonly is Gabapentin prescribed? Of the 1,599 medications we measure, Gabapentin ranks #6 by Medicaid prescriptions — more than 100% of them.

Where Gabapentin ranks among the drugs we measure · Q1–Q4 2025 · neighbors ±5
Total prescriptions — #6 of 1,599
#1 Albuterol 19,527,981 Rx #2 Albuterol Oral Inhalat... 19,477,774 Rx #3 Ibuprofen 13,722,924 Rx #4 Atorvastatin 12,123,513 Rx #5 Cetirizine 12,078,490 Rx #6 Gabapentin 11,834,341 Rx #7 Amoxicillin 11,452,147 Rx #8 Fluticasone 11,068,970 Rx #9 Ondansetron 10,434,600 Rx #10 Fluticasone Nasal Spra... 9,154,113 Rx #11 Metformin 9,119,008 Rx

Utilization by Gabapentin product

Pick a product to see its own Medicaid numbers. Each chip is one clinical product — a specific strength & dosage form as defined by RxNorm — with brand-name and generic versions combined.

The 300 mg oral capsule is the most-dispensed Gabapentin product — about 43% of these Medicaid prescriptions.

gabapentin 300 MG Oral Capsule Most dispensed

5,100,566 Medicaid prescriptions (Q1–Q4 2025) 43% of Gabapentin prescriptions shown $61.3M gross reimbursement (before rebates) ≈ $12 per prescription (gross)

Summed across the 48 of 856 listed NDC products with Medicaid activity — every brand and generic of this exact strength & form. RxNorm 310431

gabapentin 100 MG Oral Capsule

2,145,395 Medicaid prescriptions (Q1–Q4 2025) 18% of Gabapentin prescriptions shown $21.3M gross reimbursement (before rebates) ≈ $9.92 per prescription (gross)

Summed across the 55 of 517 listed NDC products with Medicaid activity — every brand and generic of this exact strength & form. RxNorm 310430

gabapentin 600 MG Oral Tablet

2,052,477 Medicaid prescriptions (Q1–Q4 2025) 17% of Gabapentin prescriptions shown $32.8M gross reimbursement (before rebates) ≈ $16 per prescription (gross)

Summed across the 41 of 504 listed NDC products with Medicaid activity — every brand and generic of this exact strength & form. RxNorm 310433

gabapentin 800 MG Oral Tablet

1,366,283 Medicaid prescriptions (Q1–Q4 2025) 12% of Gabapentin prescriptions shown $24.2M gross reimbursement (before rebates) ≈ $18 per prescription (gross)

Summed across the 37 of 424 listed NDC products with Medicaid activity — every brand and generic of this exact strength & form. RxNorm 310434

gabapentin 400 MG Oral Capsule

1,000,583 Medicaid prescriptions (Q1–Q4 2025) 8% of Gabapentin prescriptions shown $12.7M gross reimbursement (before rebates) ≈ $13 per prescription (gross)

Summed across the 42 of 428 listed NDC products with Medicaid activity — every brand and generic of this exact strength & form. RxNorm 310432

gabapentin 50 MG/ML Oral Solution

151,627 Medicaid prescriptions (Q1–Q4 2025) 1% of Gabapentin prescriptions shown $6.4M gross reimbursement (before rebates) ≈ $42 per prescription (gross)

Summed across the 10 of 49 listed NDC products with Medicaid activity — every brand and generic of this exact strength & form. RxNorm 283523

gabapentin enacarbil 600 MG Extended Release Oral Tablet

4,903 Medicaid prescriptions (Q1–Q4 2025) <1% of Gabapentin prescriptions shown $4.5M gross reimbursement (before rebates) ≈ $916 per prescription (gross)

Summed across the 1 of 2 listed NDC products with Medicaid activity — every brand and generic of this exact strength & form. RxNorm 1101338

Once-Daily gabapentin 300 MG Oral Tablet

3,808 Medicaid prescriptions (Q1–Q4 2025) <1% of Gabapentin prescriptions shown $503,910 gross reimbursement (before rebates) ≈ $132 per prescription (gross)

Summed across the 4 of 14 listed NDC products with Medicaid activity — every brand and generic of this exact strength & form. RxNorm 1806380

gabapentin enacarbil 300 MG Extended Release Oral Tablet

2,670 Medicaid prescriptions (Q1–Q4 2025) <1% of Gabapentin prescriptions shown $2.3M gross reimbursement (before rebates) ≈ $869 per prescription (gross)

Summed across the 1 of 2 listed NDC products with Medicaid activity — every brand and generic of this exact strength & form. RxNorm 1482820

Once-Daily gabapentin 600 MG Oral Tablet

2,548 Medicaid prescriptions (Q1–Q4 2025) <1% of Gabapentin prescriptions shown $824,665 gross reimbursement (before rebates) ≈ $324 per prescription (gross)

Summed across the 4 of 15 listed NDC products with Medicaid activity — every brand and generic of this exact strength & form. RxNorm 1806382

gabapentin 100 MG Oral Tablet

1,690 Medicaid prescriptions (Q1–Q4 2025) <1% of Gabapentin prescriptions shown $2.7M gross reimbursement (before rebates) ≈ $1,576 per prescription (gross)

Summed across the 1 of 1 listed NDC products with Medicaid activity — every brand and generic of this exact strength & form. RxNorm 476673

gabapentin 400 MG Oral Tablet

1,459 Medicaid prescriptions (Q1–Q4 2025) <1% of Gabapentin prescriptions shown $2M gross reimbursement (before rebates) ≈ $1,398 per prescription (gross)

Summed across the 1 of 1 listed NDC products with Medicaid activity — every brand and generic of this exact strength & form. RxNorm 476679

Once-Daily gabapentin 900 MG Oral Tablet

290 Medicaid prescriptions (Q1–Q4 2025) <1% of Gabapentin prescriptions shown $234,736 gross reimbursement (before rebates) ≈ $809 per prescription (gross)

Summed across the 2 of 5 listed NDC products with Medicaid activity — every brand and generic of this exact strength & form. RxNorm 2634743

Once-Daily gabapentin 450 MG Oral Tablet

30 Medicaid prescriptions (Q1–Q4 2025) <1% of Gabapentin prescriptions shown $12,768 gross reimbursement (before rebates) ≈ $426 per prescription (gross)

Summed across the 1 of 5 listed NDC products with Medicaid activity — every brand and generic of this exact strength & form. RxNorm 2634747

Once-Daily gabapentin 750 MG Oral Tablet

12 Medicaid prescriptions (Q1–Q4 2025) <1% of Gabapentin prescriptions shown $5,984 gross reimbursement (before rebates) ≈ $499 per prescription (gross)

Summed across the 1 of 5 listed NDC products with Medicaid activity — every brand and generic of this exact strength & form. RxNorm 2634751

Shares are of the Medicaid prescriptions shown here. Product grouping follows RxNorm (the National Library of Medicine’s drug terminology), so “one product” means one strength & dosage form regardless of manufacturer. Dollar figures are gross Medicaid reimbursement before mandatory rebates — rebates (often large, especially for brand-name drugs) are confidential, so actual net cost to Medicaid is lower than shown.

Source: Medicaid State Drug Utilization Data (CMS), aggregated by generic ingredient — summed across every NDC (all brands, strengths, salt forms and dosage forms) of Gabapentin, and across all states and both fee-for-service and managed-care claims. A general popularity signal; it excludes Medicare, commercial insurance and cash prescriptions, so it is not total U.S. use. Based on the 249 of 2,828 listed Gabapentin NDCs with Medicaid activity.

🔍 Compare Gabapentin products

A representative set of FDA-listed product records for Gabapentin — across manufacturers, strengths, and dosage forms, grouped by form with each product’s manufacturer and how the FDA approved it. The same medicine may be made and packaged by different companies, so a single drug can have many directory entries. (It’s also why a refill can look different — a new shape, color, or box — even though it contains the same medication.)

Showing 200 of 1,543 products — FDA National Drug Code Directory. See every product, package size and price: browse all 1,543 Gabapentin NDCs →

RxNorm Concept Web — From Ingredient to Every Form and Strength

This page starts with one ingredient concept (IN). The branches below show its dose-form concepts (SCDF), then the available clinical drug and strength concepts (SCD). Combination products remain separate concepts with their own pages.

Ingredient (IN) Gabapentin RxCUI 25480 4 dose forms · 16 strengths
  1. Dose form (SCDF) Extended Release Oral Tablet RxCUI 1087974 In current FDA listings
    Clinical drug / strength (SCD) enacarbil 300 MG RxCUI 1482820 enacarbil 600 MG RxCUI 1101338
  2. Dose form (SCDF) Oral Capsule RxCUI 378100 In current FDA listings
    Clinical drug / strength (SCD) 100 MG RxCUI 310430 200 MG RxCUI 2739001 300 MG RxCUI 310431 400 MG RxCUI 310432
  3. Dose form (SCDF) Oral Solution RxCUI 378101 In current FDA listings
    Clinical drug / strength (SCD) 50 MG/ML RxCUI 283523

Look up RxCUI 25480 in the RxCUI Atlas →

RxNorm is the U.S. National Library of Medicine’s normalized drug vocabulary. Its concept hierarchy can include forms that are not currently marketed; the status on each branch compares that concept with current FDA listings. RxCUIs identify vocabulary concepts, not individual packages or manufacturers.

🏷️ Gabapentin brand names

Gralise Horizant Neurontin Relgaabi Gabarone Gaba 300-EZS

🏭 Who makes Gabapentin: manufacturers and labelers

Bryant Ranch Prepack 197 Remedyrepack Inc. 102 A-S Medication Solutions 56 Proficient Rx LP 51 Aphena Pharma Solutions - Tennessee, LLC 48 NuCare Pharmaceuticals,Inc. 45 Preferred Pharmaceuticals Inc. 35 St. Mary's Medical Park Pharmacy 34 Cardinal Health 107, LLC 30 Advanced Rx Pharmacy Of Tennessee, Llc 28 Direct_Rx 26 PD-Rx Pharmaceuticals, Inc. 26 Westminster Pharmaceuticals, LLC 23 Aurobindo Pharma Limited 22 Major Pharmaceuticals 22 Direct Rx 22 ScieGen Pharmaceuticals, Inc. 20 Asclemed USA, Inc. 20 Almatica Pharma LLC 19 Preferred Pharmaceuticals, Inc. 19 Ascend Laboratories, LLC 18 Parke-Davis Div of Pfizer Inc 18 Strides Pharma Science Limited 17 Quality Care Products, LLC 16

…and 16 more on the FDA NDC directory.

Gabapentin drug class (RxNorm)

Gabapentin belongs to the Gabapentinoids class.

Drug family (ATC) Gabapentinoids

Classified by RxNorm RxClass — the U.S. National Library of Medicine's standardized drug-classification service (Established Pharmacologic Class from the FDA, the ATC drug family from the WHO, and mechanism of action). Reference only, not medical advice.

🔬 Sources for this Gabapentin page

Core label, product, RxNorm, safety, and utilization data on this page come from the sources identified below. AI-written, editorial, and licensed sections are labeled separately.

📄
FDA-filed drug labels (SPL) Uses, dosing, warnings & side effects from SPL records retrieved through openFDA; the linked representative set can be verified on DailyMed. ✓ Linked label effective May 12, 2026
🏭
Forms, brands & labelersAggregated from ingredient-matched FDA National Drug Code Directory product records for Gabapentin.
📈
Real-world reportsThe FDA Adverse Event Reporting System (FAERS), served through openFDA.
🚨
Recalls & shortagesopenFDA drug-enforcement reports and the FDA drug-shortage database.
🧾 Clinical label set — FDA-filed SPL labels retained for Gabapentin after exact ingredient or ingredient-combination matching and applicable route/form matching
Clinical labels in scope
452
NDC products indexed
1,543
Distinct labelers/manufacturers represented
155
Linked representative label ⓘ
Viatris Specialty LLC
Linked label effective
May 12, 2026
Composite sections available
23
Linked SPL Set ID
97935fd9-1d4a-43b6-a5d9-de994591187b
Linked SPL Document ID
2d43f32d-2d96-4011-84ac-507c3307dc27
Open the linked representative label on DailyMed ↗

How we combine label and product data

HelloPharmacist combines public FDA and NLM records; we don’t author the underlying clinical facts. We identified 452 FDA-filed SPL label sets within the page’s selected clinical scope after exact ingredient or ingredient-combination matching and applicable route/form matching. The representative label is the starting point for the displayed reference monograph; the 12 largest stored in-scope SPL records, which may include that representative, are compared section by section, and the longest available version of each section is retained. Forms, routes, brands, labelers, product-listed strengths, and product-record counts are aggregated separately from ingredient-matched FDA NDC Directory records; package records listed above are associated with the linked SPL; and the normalized concept hierarchy comes from NLM RxNorm.

For canonical ingredient pages, bounded product-attributed indication and administration excerpts may be added to the AI evidence, and the generator is instructed to preserve available product, brand, route, and form qualifiers instead of treating one label as universal. Where a section is identified as AI-written, its plain-language text is generated from bounded label evidence. New draft drug pages remain in the admin review queue before first publication. Viatris Specialty LLC is the representative DailyMed label linked for verification and dates; it is not the sole source used for the page.

This is general education, not medical advice — always consult your doctor or pharmacist about your medications and any medical condition. For the exact wording of the linked representative label, view that label on DailyMed; some displayed composite sections may come from other in-scope SPL labels. Learn how we use AI and our data sources & update cadence.