Seirogan is one of the medicines we always keep in our family's medicine cabinet. We're especially used to carrying it with us when traveling. Whenever we occasionally eat something bad or have an upset stomach, it's what comes to mind. The small bottle doesn't take up much space, so it's convenient to keep at home or in your travel luggage.

Seirogan
A Gastrointestinal Medication Used for Over 100 Years in Japan.
Seirogan is a gastrointestinal medication that has been a staple in Japanese households for over 100 years.
Its main active ingredient, the herbal medicine (a natural plant with medicinal properties) and Japanese pharmacopoeia “JP wood creosote” helps to adjust the water balance in the intestines without disrupting intestinal movement.
Seirogan is particularly effective against food poisoning, water poisoning, dyspepsia, loose stool caused by drinks, diarrhea, vomiting, and loose stool caused by stress or colds.
Highlights
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Can be used by those 5 years and older.
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Take 3 times a day.
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Ingredients do not cause drowsiness.
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Iconic trumpet marking on packaging.
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Has a distinctive fragrance, but there are odorless series available as well.
Photos
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Iconic trumpet marking on packaging
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A gastrointestinal medicine commonly kept in Japanese households
Reviews
Some reviews are AI-translated.
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A medicine we've always kept at home since I was little, mainly for relieving diarrhea, loose stools, stomach discomfort, and other symptoms. I remember it having a pretty strong smell, which I personally don't particularly like, but for older family members, it's reassuring to keep a bottle at home.
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Seirogan is a household medicine that many people pick up when traveling in Japan. It's mainly used to relieve diarrhea and stomach discomfort caused by indigestion. Although it has a very strong, distinctive smell as soon as you open it, many people have long trusted its effectiveness.
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A great medicine to always keep at home.
The new sugar-coated tablets don’t have that dark, smelly odor, so they’re much easier to take. -
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This medicine has been sitting around for ages. It seems like it never really goes bad...
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Details
- Product name in Japanese
- 正露丸
- Contents/Price
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50pc 800 yen / 100pc 1,000 yen / 200pc 1,800 yen / 400pc 3,200 yen
*Prices may vary by shop. - Manufacturer
- Taiko Pharmaceutical Co., Ltd.
- Official Website
- Official Website (English)




