OpenBilldrug price receipt

NADAC week of 2026-10-14

LAMOTRIGINE 25 MG DISPER TAB

For 30 tablets

Pharmacies pay

$4.42 filed

30 × $0.1473 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

$5.00 filed

30 × $0.16656 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

1.1× estimated

Medicare paid 1.1× what pharmacies pay.

Part D averages every strength and form sold under “Lamotrigine” 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

$10.08 estimated

$4.42 + $0.66 (15%) + $5.00 fee per fill = $10.08

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

LAMOTRIGINE 25 MG DISPER TAB is how the CMS NADAC file names this product. The FDA NDC Directory lists it as lamotrigine.

FDA gives its dosage form as “tablet, chewable” and “tablet, for suspension” and its route as oral.

FDA lists 5 labelers (the companies named on the label) for its NDCs, among them Rising Pharma Holdings, Inc., Dr.Reddy's Laboratories Limited and Alembic Pharmaceuticals Inc.

FDA lists it under 2 Established Pharmacologic Classes: Anti-epileptic Agent and Mood Stabilizer.

The NADAC file of 2026-10-14 prices it under 5 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 $4.42 for 30 tablets (30 × $0.1473 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.

All 5 NDCs

Other strengths, forms and brands

36 other products in the NADAC file share the FDA nonproprietary name lamotrigine with LAMOTRIGINE 25 MG DISPER TAB. The 23 below share a strength or dosage form with it first; search OpenBill for the rest.

ProductPharmacies pay per unitMedicare per unit
LAMICTAL 25 MG DISPER TABLET
brand · tablet, for suspension
$11.18289 per EA filed
eff. 2026-09-23
$11.42567 per EA filed
Part D 2024 average
LAMICTAL 25 MG TABLET
brand · tablet
$10.29501 per EA filed
eff. 2026-09-23
$11.42567 per EA filed
Part D 2024 average
LAMICTAL 100 MG TABLET
brand · tablet
$10.91795 per EA filed
eff. 2026-09-23
$11.42567 per EA filed
Part D 2024 average
LAMICTAL 150 MG TABLET
brand · tablet
$11.4684 per EA filed
eff. 2026-09-23
$11.42567 per EA filed
Part D 2024 average
LAMICTAL 200 MG TABLET
brand · tablet
$12.05122 per EA filed
eff. 2026-09-23
$11.42567 per EA filed
Part D 2024 average
LAMICTAL ODT 25 MG TABLET
brand · tablet, orally disintegrating
$12.81313 per EA filed
eff. 2026-09-23
$15.99002 per EA filed
Part D 2024 average
LAMICTAL ODT 50 MG TABLET
brand · tablet, orally disintegrating
$13.65287 per EA filed
eff. 2026-05-20
$15.99002 per EA filed
Part D 2024 average
LAMICTAL ODT 100 MG TABLET
brand · tablet, orally disintegrating
$14.63582 per EA filed
eff. 2026-09-23
$15.99002 per EA filed
Part D 2024 average
LAMICTAL ODT 200 MG TABLET
brand · tablet, orally disintegrating
$17.48893 per EA filed
eff. 2026-09-23
$15.99002 per EA filed
Part D 2024 average
LAMICTAL XR 25 MG TABLET
brand · tablet, film coated, extended release
$14.2042 per EA filed
eff. 2026-09-23
$34.14263 per EA filed
Part D 2024 average
LAMICTAL XR 50 MG TABLET
brand · tablet, film coated, extended release
$28.35003 per EA filed
eff. 2026-09-23
$34.14263 per EA filed
Part D 2024 average
LAMICTAL XR 100 MG TABLET
brand · tablet, film coated, extended release
$30.40041 per EA filed
eff. 2026-09-23
$34.14263 per EA filed
Part D 2024 average
LAMICTAL XR 200 MG TABLET
brand · tablet, film coated, extended release
$32.33073 per EA filed
eff. 2026-09-23
$34.14263 per EA filed
Part D 2024 average
LAMICTAL XR 250 MG TABLET
brand · tablet, film coated, extended release
$44.21042 per EA filed
eff. 2026-09-23
$34.14263 per EA filed
Part D 2024 average
LAMICTAL XR 300 MG TABLET
brand · tablet, film coated, extended release
$48.64677 per EA filed
eff. 2026-09-23
$34.14263 per EA filed
Part D 2024 average
LAMOTRIGINE 5 MG DISPER TABLET
generic · tablet, chewable / tablet, for suspension
$0.16729 per EA filed
eff. 2026-09-23
$0.16656 per EA filed
Part D 2024 average
LAMOTRIGINE 25 MG DISPER TAB this page
generic · tablet, chewable / tablet, for suspension
$0.1473 per EA filed
eff. 2026-09-23
$0.16656 per EA filed
Part D 2024 average
LAMOTRIGINE 25 MG TABLET
generic · tablet
$0.02676 per EA filed
eff. 2026-09-23
$0.16656 per EA filed
Part D 2024 average
LAMOTRIGINE 100 MG TABLET
generic · tablet
$0.04873 per EA filed
eff. 2026-09-23
$0.16656 per EA filed
Part D 2024 average
LAMOTRIGINE 150 MG TABLET
generic · tablet
$0.06947 per EA filed
eff. 2026-09-23
$0.16656 per EA filed
Part D 2024 average
LAMOTRIGINE 200 MG TABLET
generic · tablet
$0.08253 per EA filed
eff. 2026-09-23
$0.16656 per EA filed
Part D 2024 average
LAMOTRIGINE ER 25 MG TABLET
generic · tablet, extended release / tablet, film coated, extended release
$0.27513 per EA filed
eff. 2026-09-23
$3.64681 per EA filed
Part D 2024 average
LAMOTRIGINE ODT 25 MG TABLET
generic · tablet, orally disintegrating / tablet
$1.29941 per EA filed
eff. 2026-09-23 to 2026-09-30
$4.459 per EA filed
Part D 2024 average
SUBVENITE 25 MG TABLET
generic · tablet
$0.02676 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. 2026-05-20, 2026-09-23, 2026-09-30 · 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 5 NDCs’ NADAC prices is $0.1473 per EA filed.

Of the 85 other products in FDA’s Anti-epileptic Agent class priced per EA, 66 have a higher middle NADAC price and 19 a lower one. The one in the middle is PHENYTEK 200 MG CAPSULE, at $1.4026 per EA filed (eff. 2026-09-23).

Of the 72 other products in FDA’s Mood Stabilizer class priced per EA, 58 have a higher middle NADAC price and 14 a lower one. The one in the middle is LAMOTRIGINE ODT 50 MG TABLET, at $1.27096 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 $5.00 for 30 tablets, at an average of $0.16656 per EA in 2024 (2024-01-01 to 2024-12-31) for “Lamotrigine”, every strength and form sold under that name together (Medicare Part D Spending by Drug, file of 2026-06-25).

That average covers 4,154,338 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 LAMOTRIGINE 25 MG DISPER TAB 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 Lamotrigine / Lamotrigine: 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.