Acetaminophen A Kunihiro
アセトアミノフェン錠A「クニヒロ」
Class 2 — Available at drug stores
Drug Type
Analgesic and antipyretic — single-ingredient acetaminophen tablets for adults
Form
Film-coated tablets
Indication
Relief of headache, toothache, post-extraction pain, sore throat, ear pain, joint pain, neuralgia, lower back pain, muscle pain, shoulder stiffness, bruise pain, fracture pain, sprain pain, menstrual pain, and traumatic pain. Relief of chills and fever.
Active Ingredients (per 1 tablet)
Acetaminophen 300 mg
Inactive Ingredients
Lactose hydrate, hydroxypropylcellulose, hypromellose, titanium dioxide, talc, carnauba wax, magnesium stearate
Instructions for Use
- ✓Try to avoid taking on an empty stomach. Allow at least 4 hours between doses.
| Age | Dose per use | Times per day |
|---|---|---|
| Adults (15 years and older) | 1 tablet | Up to 3 times daily |
| Under 15 years | Do not use | — |
- ✓Follow the prescribed dosage instructions carefully.
- ✓To remove tablets from the PTP sheet, press firmly on the raised side of the sheet to break through 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.
- ✕Do not use this product if you:
- (1) Have ever had an allergic reaction to this product or any of its ingredients.
- (2) Have ever experienced asthma after taking this product, another pain reliever/fever reducer, or a cold medicine.
- ✕Do not use any of the following medicines while taking this product: other pain relievers/fever reducers, cold medicines, or sedatives.
- ✕Do not drink alcohol before or after taking this product.
- ✕Do not use for an extended period.
- ✓Seek immediate medical attention if any of the following serious symptoms appear:
- • Shock (anaphylaxis): Itching, hives, hoarseness, sneezing, itchy throat, difficulty breathing, palpitations, or clouded consciousness shortly after use.
- • Stevens-Johnson syndrome / toxic epidermal necrolysis / acute generalized exanthematous pustulosis: High fever, redness of eyes, eye discharge, sores on lips, sore throat, widespread rash or redness on skin, small blisters on reddened skin, general fatigue, or loss of appetite — that persist or rapidly worsen.
- • Drug-induced hypersensitivity syndrome: Wide-area skin redness, generalized rash, fever, general malaise, or swollen lymph nodes (neck, armpits, or groin).
- • Liver disorder: Fever, itching, rash, jaundice (yellowing of the skin or whites of the eyes), dark urine, general fatigue, or loss of appetite.
- • Kidney disorder: Fever, rash, decreased urine output, swelling throughout the body, general fatigue, joint pain, or diarrhea.
- • Interstitial pneumonia: Shortness of breath with climbing stairs or slight exertion, dry cough, fever, or symptoms that appear suddenly or persist.
- • Asthma: Wheezing or whistling breath sounds, or difficulty breathing.
- ⚠Consult a doctor, dentist, pharmacist, or registered salesperson before use if you:
- (1) Are under medical treatment by a doctor or dentist.
- (2) Are pregnant or possibly pregnant.
- (3) Are elderly.
- (4) Have had allergic reactions to medicines or other substances.
- (5) Have been diagnosed with heart disease, kidney disease, liver disease, or gastric or duodenal ulcer.
- ✓Stop use and consult a doctor, pharmacist, or registered salesperson — bringing this package insert with you — if any of the following symptoms appear, as they may be side effects:
- Skin: Rash or redness, itching
- Gastrointestinal: Nausea/vomiting, loss of appetite
- Nervous system: Dizziness
- Other: Excessive drop in body temperature
- ✓Stop use and consult a doctor, dentist, pharmacist, or registered salesperson — bringing this package insert with you — if symptoms do not improve after 5–6 doses.
- ✓Store in a cool, dry place away from direct sunlight. Keep out of reach of children. Do not transfer to another container. Do not use after the expiry date.
Additional Information
Works mainly on the central nervous system to relieve pain and reduce fever. Has minimal effect on prostaglandin (PG), the substance that protects the stomach lining, making it gentle on the stomach. Film-coated tablets for easy swallowing.
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.