GABAPENTIN ER 300 MG TABLET
For 30 tablets
Pharmacies pay
$19.15 filed
30 × $0.63846 per EA
CMS NADAC · nadac-national-average-drug-acquisition-cost-20261014.csv · eff. 2026-09-23 · as of 2026-10-14 · retrieved 2026-10-17
Medicare Part D paid
$150.41 filed
30 × $5.0138 per EA, Part D average
Medicare's price is not your price.
Medicare Part D · DSD_PTD_RY26_P04_V10_DY24_BGM.csv · eff. 2024-01-01 to 2024-12-31 · as of 2026-06-25 · retrieved 2026-10-18
The spread
7.9× estimated
Medicare paid 7.9× what pharmacies pay.
Part D averages every strength and form sold under “Gabapentin ER” / “Gabapentin” into one figure, so it is not specific to this NDC.
OpenBill calculation · DSD_PTD_RY26_P04_V10_DY24_BGM.csv + nadac-national-average-drug-acquisition-cost-20261014.csv · NADAC eff. 2026-09-23 (file of 2026-10-14, retrieved 2026-10-17) · Part D 2024-01-01 to 2024-12-31 (file of 2026-06-25, retrieved 2026-10-18)
Cost-plus estimate
$27.02 estimated
$19.15 + $2.87 (15%) + $5.00 fee per fill = $27.02
This is a model, not a price any pharmacy quoted. Shipping is not included. How it is worked out
OpenBill calculation · nadac-national-average-drug-acquisition-cost-20261014.csv · NADAC eff. 2026-09-23 (file of 2026-10-14, retrieved 2026-10-17)
Open the interactive card Change the quantity, type what you were charged, and see every record in full.
What it is
GABAPENTIN ER 300 MG TABLET is how the CMS NADAC file names this product. The FDA NDC Directory lists it as gabapentin.
FDA gives its dosage form as “tablet, film coated” and “tablet” and its route as oral.
FDA lists 4 labelers (the companies named on the label) for its NDCs, among them Camber Pharmaceuticals, Inc., Epic Pharma, LLC and ScieGen Pharmaceuticals, Inc.
FDA lists no Established Pharmacologic Class for it.
The NADAC file of 2026-10-14 prices it under 4 NDCs (National Drug Codes).
NADAC classes it as a generic drug (rate-setting class G), and does not mark it as sold over the counter.
What pharmacies pay
Pharmacies pay $19.15 for 30 tablets (30 × $0.63846 per EA, rounded to the cent), by the CMS NADAC file of 2026-10-14; that price took effect on 2026-09-23. That is what pharmacies pay their suppliers, not what they charge you.
NADAC’s explanation code for it: 1, calculated from the most recently completed pharmacy survey.
What NADAC measures · Why 30 tablets · NADAC explanation codes
All 4 NDCs
- 31722-0091-90 · Camber Pharmaceuticals, Inc. · $0.63846 per EA · eff. 2026-09-23 filed
- 42806-0656-09 · Epic Pharma, LLC · $0.63846 per EA · eff. 2026-09-23 filed
- 50228-0523-90 · ScieGen Pharmaceuticals, Inc. · $0.63846 per EA · eff. 2026-09-23 filed
- 68382-0608-16 · Zydus Pharmaceuticals USA Inc. · $0.63846 per EA · eff. 2026-09-23 filed
Other strengths, forms and brands
20 other products in the NADAC file share the FDA nonproprietary name gabapentin with GABAPENTIN ER 300 MG TABLET.
| Product | Pharmacies pay per unit | Medicare per unit |
|---|---|---|
| GABAPENTIN 100 MG CAPSULE | $0.02184 per EA filed | $0.1192 per EA filed |
| GABAPENTIN 250 MG/5 ML SOLN | $0.08761 to $0.1712 per ML filed | We don’t know yet |
| GABAPENTIN 300 MG CAPSULE | $0.03142 per EA filed | $0.1192 per EA filed |
| GABAPENTIN 400 MG CAPSULE | $0.04222 per EA filed | $0.1192 per EA filed |
| GABAPENTIN 600 MG TABLET | $0.06398 per EA filed | $0.1192 per EA filed |
| GABAPENTIN 800 MG TABLET | $0.08829 per EA filed | $0.1192 per EA filed |
| GABAPENTIN ER 300 MG TABLET this page | $0.63846 per EA filed | $5.0138 per EA filed |
| GABAPENTIN ER 600 MG TABLET | $1.02497 per EA filed | $5.0138 per EA filed |
| GABARONE 100 MG TABLET | $8.78889 per EA filed | We don’t know yet |
| GABARONE 400 MG TABLET | $8.57111 per EA filed | We don’t know yet |
| GRALISE ER 300 MG TABLET | $10.18511 per EA filed | We don’t know yet |
| GRALISE ER 450 MG TABLET | $10.14274 per EA filed | We don’t know yet |
| GRALISE ER 600 MG TABLET | $10.15306 per EA filed | We don’t know yet |
| GRALISE ER 900 MG TABLET | $15.20748 per EA filed | We don’t know yet |
| NEURONTIN 100 MG CAPSULE | $2.95761 per EA filed | $8.87549 per EA filed |
| NEURONTIN 300 MG CAPSULE | $7.37105 per EA filed | $8.87549 per EA filed |
| NEURONTIN 400 MG CAPSULE | $8.86718 per EA filed | $8.87549 per EA filed |
| NEURONTIN 600 MG TABLET | $14.11861 per EA filed | $8.87549 per EA filed |
| NEURONTIN 800 MG TABLET | $16.88137 per EA filed | $8.87549 per EA filed |
| RELGAABI 300 MG CAPSULE | $0.03142 per EA filed | $0.1192 per EA filed |
| RELGAABI 400 MG CAPSULE | $0.04222 per EA filed | $0.1192 per EA filed |
Part D is one average per brand and generic name, over every strength and form.
CMS NADAC · nadac-national-average-drug-acquisition-cost-20261014.csv · eff. between 2025-12-17 and 2026-09-23 (4 dates) · as of 2026-10-14 · retrieved 2026-10-17
Medicare Part D · DSD_PTD_RY26_P04_V10_DY24_BGM.csv · eff. 2024-01-01 to 2024-12-31 · as of 2026-06-25 · retrieved 2026-10-18
What Medicare paid
Medicare Part D paid $150.41 for 30 tablets, at an average of $5.0138 per EA in 2024 (2024-01-01 to 2024-12-31) for “Gabapentin ER” and “Gabapentin”, every strength and form sold under that name together (Medicare Part D Spending by Drug, file of 2026-06-25).
That average covers 8,073 Part D claims (fills, including refills) for 2024-01-01 to 2024-12-31, across every maker, strength and form under the name.
Medicare's price is not your price.
What Part D spending measures · Which Medicare figure OpenBill compares · How the spread is worked out
What to ask at the counter
None of these figures is your price: what you pay depends on your pharmacy, your insurance, coupons and discounts.
- What is your cash price for 30 tablets? Is it lower than what I would pay through my insurance?
- If you have Medicare Part D: what is my plan’s copay or coinsurance for it? The Part D average on this page is not what you pay.
- These are questions about price, not medical advice. Do not change or stop a medicine without talking to your prescriber or pharmacist.
Questions
- Why is the comparison with Medicare for GABAPENTIN ER 300 MG TABLET labelled estimated?
- Beyond what the card shows, the records give these reasons: The Part D figure covers 2024-01-01 to 2024-12-31; the NADAC price is from the file of 2026-10-14. Part D spending basis, as the Part D record states it: Part D 2024 average spend per dosage unit for Gabapentin ER / Gabapentin: all makers, strengths, forms and routes combined, claim-weighted; gross cost incl. dispensing fees and patient pay, before rebates. Unit taken as NADAC's EA. Joined on generic name.