Recommended Over-the-Counter Medicines in Japan (Stomach Medicines Edition)
Hello everyone, this is BLEZ Pharmacy, located on Asakusa Kokusai Street in Taito-ku, Tokyo.
Continuing from our previous edition on cold medicines, this time we will be introducing stomach medicines. Stomach troubles can affect anyone and can come with a variety of symptoms. Whether you’re at work, on the go, or traveling, it’s reassuring to have the right medicine on hand to address these issues.
Stomach troubles can range from nausea and vomiting to diarrhea, constipation, and abdominal pain. It is important to choose the right medicine for each symptom. In this article, we will introduce medicines that are particularly recommended for each type of symptom, so please refer to it as needed.

Here are some over-the-counter medicines we recommend:
- Ohta’s Isan (stomach medicine)
- Gaster 10 (stomach acid reducer)
- Sukra-to Tablets (gastric mucosa protector)
- Liquid Cabagin (gastric mucosa protector)
- Tomedain Kowa (antidiarrheal)
- Biofermin Antidiarrheal (antidiarrheal)
- Colac 2 (laxative)
- Biofermin Magnesium Oxide (laxative)
- Buscopan (antispasmodic)
Recommended Medicines for Nausea and Vomiting
- Ohta’s Isan

- Features: A gastrointestinal medicine with herbal ingredients, effective for stomach upset and heartburn. Available in tablet and powder forms.
- Recommended Points: Made with natural ingredients, it can be used with confidence. It contains digestive aids, making it a good choice for overeating and drinking.
2. Gaster 10

- Features: Contains the same active ingredient as Gaster, which is used for medical purposes to suppress stomach acid secretion. It is fast-acting and can be felt immediately. It can be taken without water.
- Recommended Points: Works quickly to address sudden nausea and vomiting, making it convenient to carry around.
3. Sukura-to Tablets

- Features: Contains ingredients that protect the gastric mucosa, suppressing irritation and inflammation. The tablet form makes it easy to take.
- Recommended Points: Offers top-class gastric surface protection among over-the-counter stomach medicines.
4. Liquid Cabagin

- Features: A liquid gastrointestinal medicine that works quickly. It provides immediate relief for stomach nausea and heartburn.
- Recommended Points: Its liquid form ensures rapid effectiveness.
Recommended Medicines for Diarrhea
- Tomedain Kowa

- Features: Contains ingredients that normalize intestinal movement, quickly suppressing diarrhea. Available in both tablet and film forms, with the film type being easy to take without water.
- Recommended Points: Contains loperamide, which is also used in medical settings, ensuring reliable efficacy.
2. Biofermin Antidiarrheal

- Features: Combines Biofermin with anti-diarrheal ingredients such as Rhubarb extract. Suitable for use from age 11.
- Recommended Points: A safe antidiarrheal without concerns of drowsiness or other side effects.
Recommended Medicines for Constipation
1.Colac 2
- Features: A tablet form medicine that takes effect the morning after taking it before bed.
- Recommended Points: Although not recommended for long-term use, it is effective for short-term relief.
2. Biofermin Magnesium Oxide

- Features: Combines Biofermin, a digestive aid, with magnesium oxide to soften stools.
- Recommended Points: Unlike Colac and similar products, it does not contain stimulant ingredients, making it safer for long-term use.
Recommended Medicine for Abdominal Pain
1.Buscopan

- Features: Contains ingredients that suppress gastrointestinal spasms, quickly addressing sudden abdominal pain.
- Recommended Points: Provides quick pain relief, making it reassuring to keep on hand for sudden abdominal pain.
Summary
Stomach problems can come on suddenly. The medicines introduced here can be chosen according to the symptoms, so please use this as a reference. When taking medicine, always follow the prescribed dosage and instructions, and if symptoms do not improve, we recommend consulting a doctor.