OpenBilldrug price receipt

NADAC week of 2026-10-14

OXCARBAZEPINE ER 300 MG TABLET

For 30 tablets

Pharmacies pay

$141.92 filed

30 × $4.73052 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

$368.44 filed

30 × $12.28128 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

2.6× estimated

Medicare paid 2.6× what pharmacies pay.

Part D averages every strength and form sold under “Oxcarbazepine ER” / “Oxcarbazepine” 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

$168.21 estimated

$141.92 + $21.29 (15%) + $5.00 fee per fill = $168.21

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

OXCARBAZEPINE ER 300 MG TABLET is how the CMS NADAC file names this product. The FDA NDC Directory lists it as oxcarbazepine.

FDA gives its dosage form as tablet, extended release and its route as oral.

Its labelers, the companies named on the label, are Ajanta Pharma USA Inc., Ingenus Pharmaceuticals, LLC and Apotex Corp.

FDA’s Established Pharmacologic Class for it is Anti-epileptic Agent.

The NADAC file of 2026-10-14 prices it under 4 NDCs (National Drug Codes); the FDA directory lists 3 of them.

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 $141.92 for 30 tablets (30 × $4.73052 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 codes for it: 1, calculated from the most recently completed pharmacy survey; 6, the CMS Covered Outpatient Drug Product File S/I/N drug category was not applied when grouping drugs for the calculation.

All 4 NDCs

Other strengths, forms and brands

13 other products in the NADAC file share the FDA nonproprietary name oxcarbazepine with OXCARBAZEPINE ER 300 MG TABLET.

ProductPharmacies pay per unitMedicare per unit
OXCARBAZEPINE 150 MG TABLET
generic · tablet, film coated / tablet
$0.10623 per EA filed
eff. 2026-09-23
We don’t know yet
OXCARBAZEPINE 300 MG TABLET
generic · tablet, film coated / tablet
$0.16669 per EA filed
eff. 2026-09-23
We don’t know yet
OXCARBAZEPINE 300 MG/5 ML SUSP
generic · suspension
$0.11023 per ML filed
eff. 2026-09-23
We don’t know yet
OXCARBAZEPINE 600 MG TABLET
generic · tablet, film coated / tablet
$0.31696 per EA filed
eff. 2026-09-23
We don’t know yet
OXCARBAZEPINE ER 150 MG TABLET
generic · tablet, extended release
$3.49768 per EA filed
eff. 2026-09-23
$12.28128 per EA filed
Part D 2024 average
OXCARBAZEPINE ER 300 MG TABLET this page
generic · tablet, extended release
$4.73052 per EA filed
eff. 2026-09-23
$12.28128 per EA filed
Part D 2024 average
OXCARBAZEPINE ER 600 MG TABLET
generic · tablet, extended release
$9.5783 per EA filed
eff. 2026-09-23
$12.28128 per EA filed
Part D 2024 average
OXTELLAR XR 150 MG TABLET
brand · tablet
$9.02471 per EA filed
eff. 2026-09-23
$17.96079 per EA filed
Part D 2024 average
OXTELLAR XR 300 MG TABLET
brand · tablet
$12.75205 per EA filed
eff. 2026-09-23
$17.96079 per EA filed
Part D 2024 average
OXTELLAR XR 600 MG TABLET
brand · tablet
$23.29894 per EA filed
eff. 2026-09-23
$17.96079 per EA filed
Part D 2024 average
TRILEPTAL 150 MG TABLET
brand · tablet, film coated
$5.72156 per EA filed
eff. 2026-01-07
We don’t know yet
TRILEPTAL 300 MG TABLET
brand · tablet, film coated
$10.45435 per EA filed
eff. 2026-09-23
We don’t know yet
TRILEPTAL 300 MG/5 ML SUSP
brand · suspension
$1.93077 per ML filed
eff. 2026-09-23
We don’t know yet
TRILEPTAL 600 MG TABLET
brand · tablet, film coated
$19.33273 per EA filed
eff. 2026-09-23
We don’t know yet

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. 2026-01-07, 2026-09-23 · 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

Compared with its class

The middle of its 4 NDCs’ NADAC prices is $4.73052 per EA filed.

Of the 85 other products in FDA’s Anti-epileptic Agent class priced per EA, 27 have a higher middle NADAC price and 58 a lower one. The one in the middle is PRIMIDONE 125 MG TABLET, at $1.37851 per EA filed (eff. 2026-09-23).

Prices are compared per unit, whatever the strength or dose, and a class is not a list of substitutes.

CMS NADAC · nadac-national-average-drug-acquisition-cost-20261014.csv · eff. 2026-09-23 · as of 2026-10-14 · retrieved 2026-10-17

What Medicare paid

Medicare Part D paid $368.44 for 30 tablets, at an average of $12.28128 per EA in 2024 (2024-01-01 to 2024-12-31) for “Oxcarbazepine ER” and “Oxcarbazepine”, every strength and form sold under that name together (Medicare Part D Spending by Drug, file of 2026-06-25).

That average covers 2,339 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 to ask at the counter

None of these figures is your price: what you pay depends on your pharmacy, your insurance, coupons and discounts.

Questions

Why is the comparison with Medicare for OXCARBAZEPINE 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 Oxcarbazepine ER / Oxcarbazepine: 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.