Buying Children's Fever and Pain Medicine in Japan: A Safety Guide for Parents
Children's medicines in Japan differ by active ingredient, strength, dosage form and permitted age. Many adult pain relievers sold here are labelled not for children under 15. This guide explains what to check before you buy or give a product, and when to get medical help instead.
Quick answer
Look for アセトアミノフェン (acetaminophen, also called paracetamol) in a product labelled for your child's age, and follow the directions on that exact package. Do not cut down an adult tablet. Check every ingredient before combining a fever medicine with a cold medicine, and tell the pharmacist your child's age, weight and anything already given. For an urgent worry, call #8000 (children's medical advice line, in Japanese) or 119 in an emergency.
Your child takes regular medicine from home? A translated medication list or vaccination record helps a Japanese pharmacist or doctor check what is safe to add.
Translate my child's medication listOn this page
- When not to self-treat
- Before you go to the pharmacy
- Acetaminophen and paracetamol
- Why adult products are different
- Medicine forms you may see
- Combination cold products
- Age, weight and measuring
- Japanese phrases for the pharmacy
- Giving medicine safely
- Bringing children's medicine to Japan
- Finding a doctor
- FAQ
- Related guides
- Official sources
When self-treatment is not appropriate
Call 119 for a serious or life-threatening emergency. Seek urgent medical help if your child is struggling to breathe, difficult to wake, having a seizure, collapsing, showing signs of a severe allergic reaction, severely dehydrated or getting rapidly worse.
119
Ambulance and fire. Say "kyūkyū desu" (it is a medical emergency) and give your location.
#8000
MHLW's children's medical telephone advice line, run by each prefecture, mainly evenings, nights and weekends. It is in Japanese, so ask a Japanese speaker to help if you can.
A fever medicine can ease discomfort, but it does not identify or treat the cause of the illness. Do not delay assessment because the temperature falls for a while after medicine.
What to prepare before you go to the pharmacy
A Japanese pharmacist or registered seller can advise you far better when you give complete, specific information. Have these details ready.
About your child
- Exact age and date of birth
- Current weight
- Allergies or previous reactions to medicines
- Medical conditions, including liver, kidney or heart conditions
- Asthma, or any reaction to a pain or fever medicine
About the illness
- Main symptom and when it started
- Measured temperature and how it was taken
- Other symptoms such as rash, cough, vomiting or pain
- Medicine already given, how much and at what time
- Whether your child is drinking, passing urine and behaving normally
Bring the packaging. If your child has already had a medicine, show the pharmacist the box, blister pack or label, or a clear photo of every side.
Acetaminophen and paracetamol for children in Japan
Acetaminophen and paracetamol are two names for the same active ingredient. On Japanese packaging it is written アセトアミノフェン. It is the ingredient most commonly found in Japanese fever and pain products intended for children.
Japan's Find OTC Medicines database lists children's acetaminophen products in several forms, but the permitted age and directions differ from product to product. Some contain acetaminophen alone; others are combination cold products that add cough, allergy or decongestant ingredients.
Single-ingredient and combination products are not interchangeable. A product with acetaminophen plus several cold ingredients has different precautions, may cause drowsiness and can duplicate a medicine you have already given.
For brand equivalents such as Tylenol, Panadol and Calonal, see Acetaminophen in Japan: Tylenol, Panadol, Calonal and OTC options.
Why adult pain relievers are different in Japan
Many common Japanese adult pain relievers do not contain acetaminophen. Products containing ibuprofen (イブプロフェン), loxoprofen (ロキソプロフェン) or aspirin (アスピリン) are frequently labelled 15歳未満の小児は服用しないでください (children under 15 should not take this).
Brand names can mislead. One brand family can sell products with completely different active ingredients, for example an adult aspirin product alongside a children's acetaminophen product. Japan's Pharmaceutical Manufacturers Association warns that aspirin should not, in principle, be used as a fever reducer for children under 15 with influenza or chickenpox. Always read the ingredient list and age limit on the exact package.
Medicine forms parents may see
Japanese children's medicines come in several dosage forms. The right one depends on your child, the product and the professional advice you receive.
Syrup or liquid シロップ
Useful when a child cannot swallow tablets. Concentrations vary, so use only the measuring device supplied and follow the exact label.
Granules or powder 顆粒・散剤
Often supplied in sachets. Do not guess a partial dose or split a sachet unless the label or a professional tells you to.
Chewable tablets チュアブル錠
Some child and adolescent products are chewable, but age limits vary. Confirm your child can use the product safely.
Suppositories 坐薬
Sometimes used when oral medicine is difficult. Ask a pharmacist or doctor about the correct product and how to use it.
Tablets 錠剤
Many adult tablets are not for younger children. Cutting or crushing an adult tablet does not make a safe children's dose.
Combination cold medicine かぜ薬
May contain acetaminophen plus several other ingredients. Do not choose one only because the package says "for children".
These are dosage forms, not product recommendations. Stock and formulations change. Ask about the product currently on the shelf and read its current package insert.
Why combination products need extra care
A child can receive too much of one ingredient when a fever medicine is followed by a cough, cold or "all-in-one" product that contains the same ingredient.
| What to check | Why it matters | What to do |
|---|---|---|
| Active ingredients | Different brands can contain the same medicine. | Check every ingredient, including アセトアミノフェン. |
| Age limit | Products in the same brand family can have different age limits. | Use the age shown on the exact package, not a similar product. |
| Drowsiness warning | Some cold medicines contain antihistamines or other sedating ingredients. | Ask the pharmacist and follow supervision warnings. |
| Cough ingredients | Codeine and dihydrocodeine carry specific age restrictions in Japan. | Do not assume a product suits your child because it is sold over the counter. |
| Medicine already given | The same ingredient may be in a prescription or an overseas medicine. | Show the pharmacist every product and the time of the last dose. |
Since 2019, Japanese labelling for prescription medicines containing codeine or dihydrocodeine has listed children under 12 as a contraindication (PMDA). Check the age warnings on any cough product before giving it to a child.
Age, weight and measuring the dose
Children's directions can be based on age, weight or both. Use your child's current details and the directions for the exact product.
- Confirm your child's current weight Do not rely on an old record if your child has grown.
- Read the exact concentration Two liquids with the same ingredient can contain different amounts per millilitre.
- Use the supplied device Use the marked syringe, cup or spoon that came with the product, not a kitchen spoon.
- Write down the time Record what you gave, how much and when, to avoid an early or double dose.
- Do not improvise after vomiting If your child vomits after a dose, ask a doctor or pharmacist before repeating it.
Useful Japanese phrases at the pharmacy
| English | Japanese |
|---|---|
| I would like to speak to a pharmacist about fever and pain medicine for a child. | 子ども用の解熱鎮痛薬について、薬剤師に相談したいです。 Kodomo-yō no genetsu chintsūyaku ni tsuite, yakuzaishi ni sōdan shitai desu. |
| My child is ___ years old and weighs ___ kilograms. | 子どもは〇歳で、体重は〇キロです。 Kodomo wa ___ sai de, taijū wa ___ kiro desu. |
| I have already given my child this medicine today. | 今日、すでにこの薬を飲ませました。 Kyō, sudeni kono kusuri o nomasemashita. |
| Does this contain acetaminophen? | アセトアミノフェンが入っていますか？ Asetaminofen ga haitte imasu ka? |
| Can this be used together with this medicine? | この薬と一緒に使っても大丈夫ですか？ Kono kusuri to issho ni tsukatte mo daijōbu desu ka? |
| From what age can this be used? | これは何歳から使えますか？ Kore wa nan-sai kara tsukaemasu ka? |
For more, see Essential Japanese phrases for healthcare and emergencies.
Giving the medicine safely
Do
- Read the package and insert every time.
- Check whose medicine it is if several children are unwell.
- Use the supplied measuring device.
- Record the product, amount and time.
- Keep medicines in the original container.
- Store them out of sight and reach of children.
Do not
- Use an adult product without professional advice.
- Combine two products before checking every ingredient.
- Guess a dose from an overseas product.
- Use a kitchen teaspoon for liquid medicine.
- Call medicine "sweets" to persuade a child to take it.
- Keep self-treating when symptoms are getting worse.
If you mix granules or liquid medicine with food or drink, use only a small amount your child will finish completely. Do not mix medicine into a full bottle or a large meal unless the pharmacist has confirmed this is appropriate.
Bringing children's medicine into Japan
A children's product sold overseas is not automatically allowed in Japan. Whether it can be brought in, and in what quantity, depends on the full ingredient list, the amount and the dosage form. Combination cough, cold, allergy or "night-time" medicines need particular care because they may contain ingredients Japan regulates differently.
Check the complete formula. Do not judge a medicine by the words "children's", "fever", "cold" or "pain relief" on the front of the box.
Not sure about a medicine you are packing for your child? A written assessment checks each active ingredient, strength, form and quantity against current published guidance before you travel.
Get my medication assessed (from US$59)See also the prohibited and restricted medication guide for Japan and Is Benadryl allowed in Japan?
When to contact a clinic or doctor
Contact a doctor when your child is very young or medically vulnerable, cannot keep fluids down, has symptoms that persist or get worse, or when you are unsure which medicine is appropriate.
For suitable non-emergency concerns, MedicTranslate can help you arrange an online English medical consultation or find foreign-friendly clinics. The doctor decides whether a remote consultation, an in-person visit or emergency care is needed.
Need help with your child's healthcare in Japan?
MedicTranslate translates medication lists, vaccination records and paediatric reports, and arranges interpreters for selected appointments. Diagnosis, prescribing and treatment remain with licensed healthcare professionals.
- Medication lists with active ingredients and Japanese equivalents where they exist
- Vaccination records and paediatric reports translated for Japanese clinics
- Interpreter support for clinic and pharmacy visits
Quotes depend on document length and language pair. Subject to the applicable terms. Please do not include your child's medical details in your first message.
Frequently asked questions
Is children's acetaminophen available in Japan?
Yes. Japan's Find OTC Medicines database lists children's products containing acetaminophen in several dosage forms. The permitted age, strength and directions differ by product.
Are acetaminophen and paracetamol the same?
Yes. They are two names for the same active ingredient. In Japanese it is written アセトアミノフェン.
Can I give my child an adult Tylenol or Calonal product?
Not by simply giving fewer tablets. Use a product and directions suitable for your child's age and weight, confirmed by the current label or a healthcare professional.
Can children take ibuprofen or loxoprofen bought in Japan?
Many Japanese over-the-counter products containing ibuprofen, loxoprofen or aspirin are labelled not for children under 15. Check the age limit on the exact package and ask a pharmacist or doctor.
Can I combine a fever medicine with a Japanese cold medicine?
Not until every active ingredient has been checked. Many cold medicines already contain acetaminophen or other ingredients that should not be doubled up.
What should I tell the pharmacist?
Your child's exact age, current weight, symptoms, allergies, medical conditions and every medicine already given, including the amount and time of the last dose.
Can I use a kitchen spoon to measure syrup?
No. Use the marked syringe, cup or spoon supplied with the product, because household spoons do not measure medicine reliably.
Should I repeat a dose if my child vomits?
Ask a doctor or pharmacist before repeating it. The right action depends on the medicine, the timing and the circumstances.
Who can I call at night if I am worried about my child?
Call #8000, MHLW's children's medical telephone advice line, which connects to your prefecture's service. It is in Japanese and hours vary by prefecture. For a serious or life-threatening emergency, call 119.
Can MedicTranslate recommend a medicine or dose?
No. Product choice, dosing and treatment advice must come from a doctor, pharmacist or other qualified healthcare professional. MedicTranslate provides translation, interpreting, medication import guidance and healthcare coordination.
This article provides general information reviewed on 28 September 2026. It does not recommend a medicine, product or dose for any individual child. Formulations, availability and directions change, so read the current Japanese label and consult a doctor or pharmacist, particularly for infants, medically vulnerable children, persistent symptoms, allergies or other medicines being taken. MedicTranslate provides translation and coordination services and does not give medical advice. Call 119 for a serious or life-threatening emergency in Japan.
- Japan Self-Medication Database Center: Find OTC Medicines (English)
- PMDA: Revisions of Precautions FY2022, including OTC acetaminophen oral and suppository products
- PMDA: Revision of Precautions, codeine phosphate and dihydrocodeine phosphate (July 2019)
- PMDA: example OTC ibuprofen package insert (not for children under 15)
- Japan Pharmaceutical Manufacturers Association: giving medicines to children (Japanese)
- MHLW: Children's medical telephone consultation (#8000) (Japanese)
- National Center for Child Health and Development: paediatric emergency care
- Japan National Tourism Organization: visitor hotline and emergency numbers