Restamin Kowa Sugar-Coated Tablets
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Class 2 β Available at drug stores
Drug Type
Antihistamine
Form
Tablets 80
Indication
Hives (urticaria), eczema, rashes, itching, rhinitis
Active Ingredients (per 9 tablets (adult daily dose))
Diphenhydramine hydrochloride 90 mg
Inactive Ingredients
Lactose, cellulose, hydroxypropyl cellulose, magnesium stearate, calcium carbonate, talc, sucrose, gum arabic, gelatin, sodium hydrogen phosphate, titanium oxide, carnauba wax
Instructions for Use
- βTake with water or lukewarm water. Can be taken with or without food. Take at least 4 hours apart.
| Age | Dose per use | Times per day |
|---|---|---|
| Adults (15 and older) | 3 tablets | 3 times daily |
| 11β14 years | 2 tablets | 3 times daily |
| 5β10 years | 1 tablet | 3 times daily |
| Under 5 years | Do not use | β |
- βChildren should take under adult supervision.
- βDo not take with other allergy medicines, cold medicines, cough medicines, nasal allergy medicines, motion sickness medicines, or any other oral medicine containing antihistamines.
- βDo not operate vehicles or machinery after taking (may cause drowsiness).
- βDo not take if you are breastfeeding, or stop breastfeeding if you take this medication.
- βDo not drink alcohol before or after taking.
- βDo not use long-term.
- βDo not exceed the recommended dose.
- β Consult a doctor, pharmacist, or registered salesperson before use if you:
- (1) Are under medical treatment.
- (2) Are pregnant or possibly pregnant.
- (3) Have had allergic reactions to medicines in the past.
- (4) Have difficulty urinating.
- (5) Have been diagnosed with glaucoma.
- βStop use immediately and consult a doctor, pharmacist, or registered salesperson, bringing this package insert with you, if any of the following occur after use:
- Skin: rash, redness, itching
- Digestive: nausea, vomiting, loss of appetite
- Urinary: difficulty urinating
- βIf dry mouth or drowsiness persists or worsens, stop use and consult a doctor, pharmacist, or registered salesperson, bringing this package insert with you.
- βIf symptoms do not improve after 5β6 days, stop and consult a doctor, pharmacist, or registered salesperson, bringing this package insert with you.
- βStore in a cool, dry place away from direct sunlight. Keep out of reach of children. Do not transfer to another container. Do not get the tablets wet; if wetted accidentally, discard those tablets. Remove the packing material inside the bottle after opening. Tighten the cap properly after each use. Do not use after the expiry date.
Sources & Documents
- Japanese product page
- Japanese PDF
- Last verified: June 4, 2026
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For informational purposes only. Always consult a doctor or pharmacist before taking any medication.