Omepral S
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Proton pump inhibitor (omeprazole), reduces stomach acid
Enteric-coated tablets
Stomach pain, heartburn, and heavy stomach feeling (this product contains a proton pump inhibitor, which reduces stomach acid secretion).
Active Ingredients (per 1 tablet)
Omeprazole 10 mg
Inactive Ingredients
Sodium lauryl sulfate, cetanol, lactose hydrate, sodium starch glycolate, hydroxypropyl cellulose, magnesium hydroxide, magnesium stearate, hypromellose, synthetic hydrotalcite, titanium oxide, hypromellose phthalate, talc, carnauba wax
Instructions for Use
- βTake 1 tablet once a day, at the same time each day.
| Age | Dose per use | Times per day |
|---|---|---|
| Adults (15 years and older) | 1 tablet | Once daily |
| Under 15 years | Do not use | β |
- βFollow the recommended dosage strictly.
- βThis tablet dissolves in the intestine. Swallow it whole; do not chew or crush it.
- βIf your symptoms clear up, stop taking it.
- βTo remove a tablet from the PTP sheet, press firmly on the raised side of the sheet with your fingertip to break the aluminum foil on the back, then take out the tablet. Do not swallow the PTP sheet, as it may puncture the esophageal lining and cause serious injury.
- βDo not use this product if you:
- (1) Have ever had an allergic reaction to this product or any of its ingredients.
- (2) Are taking rilpivirine hydrochloride.
- βDo not take any other stomach and intestinal medicine while taking this product.
- βDo not take this product while breastfeeding. If you take it, avoid breastfeeding.
- βDo not take for more than 2 weeks in a row, counting any use of other proton pump inhibitors. (You may overlook a serious digestive disease, so see a doctor.)
- βSeek immediate medical attention if any of the following serious symptoms appear:
- β’ Shock (anaphylaxis): Itching of skin, hives, hoarseness, sneezing, itchy throat, difficulty breathing, palpitations, or clouded consciousness immediately after use.
- β’ Stevens-Johnson syndrome / toxic epidermal necrolysis: High fever, redness of eyes, eye discharge, sores on lips, sore throat, or widespread rash or redness on skin that persists or rapidly worsens.
- β’ Rhabdomyolysis: Pain in the muscles of the limbs, shoulders, or lower back, numbness or weakness in the limbs, stiffness, general fatigue, or reddish-brown urine.
- β’ Liver disorder: Fever, itching, rash, jaundice (yellowing of the skin or whites of the eyes), dark urine, general fatigue, or loss of appetite.
- β’ Kidney disorder: Fever, rash, decreased urine output, swelling throughout the body, general fatigue, joint pain, or diarrhea.
- β’ Interstitial pneumonia: Shortness of breath with climbing stairs or slight exertion, dry cough, fever, or other symptoms that appear suddenly or persist.
- β’ Blood disorder: Sore throat, fever, general fatigue, pale face or inner eyelids, easy bleeding (bleeding gums, nosebleed), bruising that does not fade when pressed, dizziness, shortness of breath, yellowing of the whites of the eyes or skin, or dark urine.
- β’ Visual disturbance: Difficulty seeing letters or shapes, or abnormal visual field.
- β’ Hyponatremia (low blood sodium): Convulsions, decreased consciousness, headache, nausea, or vomiting.
- β’ Hypomagnesemia (low blood magnesium): Nausea, vomiting, loss of appetite, general fatigue, twitching of the muscles of the face or limbs, feeling spaced out for a moment, decreased consciousness, stiff muscles in the hands and feet with convulsive shaking, numbness, dizziness, palpitations, or fainting.
- β’ Confusion: Poor concentration, giving wrong answers when spoken to, or disorganized behavior.
- β Consult a doctor or pharmacist before use if you:
- (1) Are under medical treatment.
- (2) Are pregnant or possibly pregnant.
- (3) Are elderly.
- (4) Have ever had an allergic reaction to a medicine.
- (5) Have been diagnosed with liver disease, or gastric or duodenal ulcer.
- (6) Have unexplained weight loss, or persistent stomach pain or abdominal pain.
- βStop use immediately and consult a doctor or pharmacist β bringing this package insert with you β if any of the following appear after taking this product, as they may be side effects:
- Skin: Rash, redness, itching, or hives
- Gastrointestinal: Diarrhea, loose stools, constipation, nausea/vomiting, abdominal bloating, abdominal pain, mouth sores, tongue inflammation, dry mouth, or difficulty swallowing, heartburn, vomiting, and white patches in the mouth (these suggest a possible Candida infection)
- Nervous system: Headache, drowsiness, abnormal sensations such as numbness, dizziness, tremor, insomnia, or depressed mood
- Cardiovascular: Palpitations
- Urinary: Frequent urination
- Other: Blurred vision, fever, swelling, gynecomastia (breast enlargement in men), hair loss, general fatigue, joint pain, taste abnormalities, menstrual problems, muscle pain, sweating, or muscle weakness
- βStop use and consult a doctor or pharmacist β bringing this package insert with you β if symptoms do not improve after 3 days.
- βStore in a cool, dry place away from direct sunlight. Keep out of reach of children. Do not transfer to another container (this can cause mistaken use or affect quality). Do not use after the expiry date.
Additional Information
Contains omeprazole, the world's first approved proton pump inhibitor (PPI), in the same amount as the prescription medicine.
The maker's pre-purchase check sheet (not the package insert) asks if you take any of these medicines or foods, because you may not be able to take this product. Consult a doctor or pharmacist if you do: diazepam, phenytoin, cilostazol, warfarin, tacrolimus hydrate, methotrexate, digoxin, methyldigoxin, itraconazole, gefitinib, erlotinib, voriconazole, clopidogrel sulfate, or foods containing St. John's wort.
Sources & Documents
- Japanese product page
- Japanese PDF
- English PDF
- Suitability Checklist
- Last verified: October 12, 2026
Related Medicines
For informational purposes only. Always consult a doctor or pharmacist before taking any medication.