エクセグラン散20%
Zonisamide (Zonegran)
Zonisamide · エクセグラン
Zonisamide was discovered in Japan and is sold here as Excegran for epilepsy and, at low dose as Trerief, for Parkinson's disease, a use approved only in Japan. Prescription-only and not controlled.
At a glance
- Prescription status
- Prescription only
- Over the counter
- Not sold OTC
- Bringing it into Japan
- ✓ 1 month Rx / 2 months OTC
- Names abroad
- Zonegran
Over the counter
Prescription only.
Prescription products in Japan
6 productsProducts on Japan's national drug price list. Prescription only: a clinic visit is needed, and pharmacies may substitute a generic with the same ingredient.
| Brand names | エクセグラン |
|---|---|
| Generic | 4 generic products |
| Dosage forms | Oral |
| Strengths (oral) | 100mg |
| Official price (per tablet or unit) | ¥10.8 – ¥25.2 Official NHI drug price. Patients with Japanese insurance pay 10–30%; visitors without it pay the full price plus consultation fees. |
Product names are shown in Japanese, exactly as printed on the package and the prescription. Show this page at the pharmacy.
エクセグラン錠100mg
ゾニサミド散20%
アメル
ゾニサミド錠100mg
2 manufacturers: KO · アメル
All listed products (6) · Drug price list as of 2026-08-12
| エクセグラン散20% | Oral · ¥25.2/g |
|---|---|
| エクセグラン錠100mg | Oral · ¥12.6/tablet |
| ゾニサミド100mg錠 · Generic | Oral · ¥10.8/tablet |
| ゾニサミド散20%「アメル」 · Generic | Oral · ¥23.8/g |
| ゾニサミド錠100mgEX「KO」 · Generic | Oral · ¥10.8/tablet |
| ゾニサミド錠100mg「アメル」 · Generic | Oral · ¥10.8/tablet |
Bringing it into Japan
Up to a 1-month supply of prescription medicine, or 2 months of OTC medicine, without any paperwork. For more, apply for a Yakkan Shoumei (import confirmation) before travel.
Getting it prescribed in Japan
Any clinic can prescribe it after a consultation. Bring the original packaging or a medication list. Use the hospital finder to find clinics with English-speaking staff or an international patient office.
Names abroad
| US | Zonegran |
|---|---|
| UK | Zonegran |
| Korea | 조네그란 |
| China | 唑尼沙胺 |
| Taiwan | 唑尼沙胺 |
Sources
- Health Insurance Claims Review & Reimbursement Services — Drug master (NHI drug price list) shinryohoshu.mhlw.go.jp — 2026-08-12
- Ministry of Health, Labour and Welfare — Bringing medicines for personal use into Japan mhlw.go.jp
This page describes how a medicine is regulated and sold in Japan. It is not medical advice and does not cover dosing for your situation; follow your doctor's and pharmacist's instructions.