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Japan· JP-1139009F2010

ラモトリギン

A lamotrigine product containing ラモトリギン, registered in Japan, on the national reimbursement list. The same ATC class is registered in 18 of our 19 countries.

On Japan’s NHI price listATC N03AX09

Checked against MHLW / PMDA (Japan) on

Informational only — not a medical device.

SOURCE REGISTER · JPMHLW / PMDA (Japan)normalisedラモトリギンATCN03AX09REGISTER NO.JP-1139009F2010PACKS LISTED0CHECKEDSeptember 25, 2026
Compare price across countriesPer daily dose · free accountAsk the assistant about ラモトリギンAnswers with sources · free accountCheck interactionsSeverity free · mechanism on Growth

Where it is registered

Lamotrigine is registered in 18 of 19 countries.

Countries holding a registration under ATC N03AX09 (lamotrigine), each read from that country’s own register.

  • This record: Japan, from MHLW / PMDA (Japan)
  • 10 of them publish a price we can compare per daily dose
Search lamotrigine products by name

Lamotrigine · ATC N03AX09

18 / 19 countries

  • Belgiumprice
  • Canada
  • Czechiaprice
  • Denmark
  • Finlandprice
  • Franceprice
  • Germany
  • Icelandprice
  • Ireland
  • Italyprice
  • Japan
  • Netherlands
  • Norwayprice
  • Polandprice
  • Sweden
  • Switzerlandprice
  • United Kingdom
  • United Statesprice
Blue: a registration under this ATC code. The ringed marker is this record’s country. Markets marked price publish a price we can compare per daily dose.

Price per daily dose

What a daily dose of lamotrigine costs, country by country.

Normalised to the WHO defined daily dose (0.3 g), the median price runs from $0.14 in United States to $4.21 in Switzerland — a ×30 gap.

  • 4 markets with a comparable price for this class
  • Public list prices, converted to USD at the rate date shown
  • US figures are pharmacy acquisition cost (CMS NADAC), not retail
Open the full comparison — free accountDrug prices for market access

Lamotrigine · price per daily dose (0.3 g)

USD · FX 28 Sept 2026

  • CH Switzerland$4.21
  • IT Italy$2.00
  • FR France$1.69
  • US United States$0.14 (acquisition cost)
Median listed price per WHO defined daily dose, in each market that publishes a price. US = pharmacy acquisition cost (CMS NADAC), not a retail price. Open the full comparison

The record

At a glance

MHLW / PMDA (Japan)
Active substance
ラモトリギン
Manufacturer
—
Country
Japan (JP)
ATC code
N03AX09
ATC class
Lamotrigine
Defined daily dose
0.3 g, O
Reimbursed
Yes
Source register
MHLW / PMDA (Japan)
Last checked
September 25, 2026

Packs & prices · 0

No packs listed by the register for this record.

Regulatory notes

No shortage, Orange Book or US label notes for this record.

Interactions

248 interactions on record for lamotrigine.

Graded by severity as the source publishes them — 68 moderate. Severity grades are free for everyone; mechanism and management come with Growth.

  • Severity for every pair — free, no plan needed
  • The source, licence and sync date on every record
  • Mechanism and what to do for each pair — Growth plan
Check lamotrigine against other medicinesHow interaction checks work

Lamotrigine · interactions on record

248 records

  • 68 moderate
  • 9 minor
  • 129 info

Most severe, free to view

  • MetoclopramideA03FA01moderate
  • DiphenhydraminA04AB05moderate
  • DronabinolA04AD10moderate
  • NabiloneA04AD11moderate

42 more interactions with mechanism and management, from a commercially licensed source.

Sign in to check
  • Interaction severity from DDInter 2.0 (Xiong G. et al., Nucleic Acids Res.), licensed CC BY-NC 4.0 — free for non-commercial use only; not covered by the Drug Database commercial licence.
Mechanism and what to do, in the interaction check
Source: DDInter 2.0 · synced 29 Sept 2026. Grades as the source publishes them.

Same class

Other records under N03AX09

Lamotrigine, as other registers publish it.

All lamotrigine products

Sourced from a public register and reproduced with attribution. Drug Database is not affiliated with, endorsed by, or a partner of MHLW / PMDA (Japan). This is an informational data service and not a medical device — verify against the official source of record before any clinical decision.

For developers

The same record over the API, and the raw payload
GET /v1/drugs/c6fa1313-1c75-47fc-a24a-14b9d8649403
GET /v1/drugs/c6fa1313-1c75-47fc-a24a-14b9d8649403?format=fhir

Every response carries last_synced_at, so freshness is a field rather than a promise. Below is exactly what the ingestion wrote, before any presentation — the same JSON the API returns under payload.

{
  "spec": "５ｍｇ１錠",
  "marks": null,
  "source": "mhlw",
  "remarks": null,
  "yj_code": "1139009F2010",
  "category": "内用薬",
  "price_yen": 6.3,
  "generic_name": "ラモトリギン",
  "product_name_jp": null,
  "therapeutic_class": "1139",
  "transitional_expiry": null
}
API referenceMCP serverPlans

See everything about lamotrigine.

This page is the registration. A free account adds the label text as the regulator wrote it, what it costs per daily dose across the markets that publish a price, a feed of what changes in the registers, and an assistant that answers with its sources. Interaction severity is free; mechanism and management are on the Growth plan. No card, nothing to install.

Try it freeOpen in the console