Ohta's Isan
太田胃散 · Ohta's Isan
Upset stomach from overeating or drinking, a heavy feeling in the stomach, heartburn, and general stomach discomfort
- OTC category
- Class 2
- Active ingredients
- Stomachic herbs (cinnamon, fennel, nutmeg, clove, citrus peel, gentian, quassia), antacids and digestive enzymes
- Typical price
- ¥800 – ¥1,200
- Manufacturer
- Ohta's Isan
- Look for this on the package
- 太田胃散
- 健胃生薬（ケイヒ・ウイキョウ・ニクズク・チョウジ・チンピ・ゲンチアナ・ニガキ末）、制酸剤、消化酵素
- Category printed on the package
- Class 2
- Sold at any drugstore or pharmacy, and online.
Show this page to the pharmacist or staff. Prices and packaging vary by store, so look for the Japanese ingredient name.
Product information on the manufacturer's site: 太田胃散 (Ohta's Isan, in Japanese)Active ingredients
| Stomachic herbs (cinnamon, fennel, nutmeg, clove, citrus peel, gentian, quassia), antacids and digestive enzymes | |
|---|---|
| Dosage forms | Powder in a tin or sachets; tablet version also sold |
Where to buy
Sold at any drugstore or pharmacy, and online.
A stomach powder sold since 1879 and a favorite souvenir among travelers from Chinese-speaking regions. Strong herbal aroma. Ask a pharmacist before combining with prescription medicines or using long-term.
Typical price: ¥800 – ¥1,200 (approximate, tax included; varies by store)
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Names abroad
| Korea | 오타이산 |
|---|---|
| China | 太田胃散 |
| Taiwan | 太田胃散 |
Sources
- Ohta's Isan ohta-isan.co.jp
- 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.