Allerbi
アレルビ
Class 2 — Available at drug stores
Drug Type
Antihistamine for allergic rhinitis (fexofenadine)
Form
Tablets
Indication
Relief of nasal allergy symptoms caused by pollen, house dust, and other allergens: sneezing, runny nose, and nasal congestion.
Active Ingredients (per 2 tablets (daily dose))
Fexofenadine hydrochloride 120mg
Inactive Ingredients
Cellulose, partially pregelatinized starch, povidone, sodium starch glycolate, light anhydrous silicic acid, hypromellose, macrogol 6000, titanium oxide, iron sesquioxide, yellow iron sesquioxide, magnesium stearate
Instructions for Use
- ✓Take morning and evening with water or lukewarm water. Do not chew.
| Age | Dose per use | Times per day |
|---|---|---|
| Adults (15 years and older) | 1 tablet | Twice daily (morning and evening) |
| Under 15 years | Do not use | — |
- ✓For seasonal allergies, start taking early once symptoms appear at the beginning of pollen season. Continued use is effective.
- ✓Stop use and consult a doctor, pharmacist, or registered salesperson if symptoms do not improve after 1 week, or if taking for more than 2 weeks.
- ✓To remove tablets: press firmly on the raised side of the PTP blister pack to break the foil backing and pop the tablet out. Do not swallow the tablet while still in the sheet — this can cause injury to the esophagus.
- ✕Do not drink alcohol before or after taking.
- ✕Do not use if breastfeeding, or stop breastfeeding if you take this medicine (animal studies have shown transfer into breast milk).
- ✕Do not take if you have had an allergic reaction to this product or any of its ingredients.
- ✕Do not use in children under 15 years of age.
- ✕Do not use together with other allergy medicines (including skin condition medicines and rhinitis oral medicines), antihistamine-containing oral medicines (cold medicines, antitussives, motion sickness medicines, sleep aids), antacids containing aluminum hydroxide or magnesium hydroxide, erythromycin (antibiotic), or apalutamide (prostate cancer treatment).
- ⚠Consult a doctor, pharmacist, or registered salesperson before use if you:
- (1) Are under medical treatment.
- (2) Are unsure whether your symptoms are due to allergic rhinitis or another cause such as a cold.
- (3) Have been diagnosed with asthma, atopic dermatitis, or other allergic conditions.
- (4) Have severe nasal congestion.
- (5) Are pregnant or possibly pregnant.
- (6) Are elderly.
- (7) Have had allergic reactions to medicines.
- ✓Stop use and consult a doctor, pharmacist, or registered salesperson if any of the following occur:
- Skin: swelling of throat, eyelids, or lips; rash, itching, hives, redness
- GI: nausea, vomiting, abdominal pain, indigestion
- CNS: numbness, headache, fatigue, malaise, dizziness, insomnia, nervousness, abnormal dreams, sleep disturbance
- Urinary: frequent urination, difficulty urinating
- Other: palpitations, taste disturbance, swelling, chest pain, difficulty breathing, high blood pressure, menstrual irregularity
- ✓Seek immediate medical attention if you experience any of the following serious side effects:
- Anaphylactic shock: sudden itching, hives, hoarseness, sneezing, throat itching, difficulty breathing, palpitations, or loss of consciousness shortly after taking
- Agranulocytosis / leukopenia / neutropenia: sudden high fever, chills, sore throat
- Liver dysfunction: fever, itching, rash, jaundice (yellowing of skin or eyes), dark urine, general malaise, loss of appetite
- ✓Monitor and consult if persistent: dry mouth, constipation, diarrhea, drowsiness.
Sources & Documents
- Japanese product page
- Japanese PDF
- Last verified: May 27, 2026
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For informational purposes only. Always consult a doctor or pharmacist before taking any medication.