Restamin Kowa Sugar-Coated Tablets
レスタミンコーワ糖衣錠
Class 2 — 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
- ✓Take 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 |
| 11–14 years | 2 tablets | 3 times daily |
| 5–10 years | 1 tablet | 3 times daily |
| Under 5 years | Do not use | — |
- ✓Children should take under adult supervision.
- ✕Do not take with other allergy medicines, cold medicines, cough medicines, nasal allergy medicines, motion sickness medicines, or any other oral medicine containing antihistamines.
- ✕Do not operate vehicles or machinery after taking (may cause drowsiness).
- ✕Do not take if you are breastfeeding, or stop breastfeeding if you take this medication.
- ✕Do not drink alcohol before or after taking.
- ✕Do not use long-term.
- ✕Do not exceed the recommended dose.
- ⚠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.
- ✓Stop 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
- ✓If dry mouth or drowsiness persists or worsens, stop use and consult a doctor, pharmacist, or registered salesperson, bringing this package insert with you.
- ✓If symptoms do not improve after 5–6 days, stop and consult a doctor, pharmacist, or registered salesperson, bringing this package insert with you.
- ✓Store 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.