Children’s Medicine Syrups in Japan: Cold, Cough and Runny-Nose Products Explained

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Checked 8 October 2026 | Products sold in Japan

I’m Irene, a pharmacist from Taiwan working in Japan.
If your child struggles with tablets or powders, a liquid can feel like a practical next step. Whether you are packing for Japan, standing in a drugstore or checking a bottle at home, let’s first work out what that syrup treats, then check whether it is appropriate for your child.

シロップ means syrup, not a particular kind of medicine. This guide compares selected MUHI, Pabron, Utsu and Stona products. Every formula containing a fever-reducing ingredient in the tables is a combination cold medicine. If you simply need a liquid fever or pain medicine your child can take, say that clearly to a clinician or pharmacist.

Fever medicine, cold medicine, cough medicine or nasal medicine?

• Fever or pain alone: ask about an appropriate single-ingredient medicine and formulation. A cold syrup may add cough or nasal ingredients your child does not need.
• Several cold symptoms: look for かぜ and read the exact indications, 効能・効果. Even within this category, current MUHI S2/P2 covers a different symptom list from the other three formulas.
• Cough and phlegm: look for せきどめ or せき・たん. The cause and severity still matter; not every cough needs a cough suppressant.
• Sneezing, a runny or blocked nose: 鼻炎 identifies a nasal-symptom medicine. These can also contain several ingredients and cannot simply be added to a cold medicine.

Within the major-brand OTC sources checked for this guide, I did not identify a current children’s liquid containing acetaminophen as its only active ingredient. That is a scoped finding, not a claim that none exists anywhere in Japan. Ask a clinician or pharmacist specifically about a suitable liquid fever medicine; medical-use liquids are outside this normal drugstore-OTC comparison. For other forms, see children’s fever medicines in Japan: chewables, tablets, granules and suppositories.

Four brands, grouped by what the medicine treats

These selected products had current official listings without a discontinuation notice when checked. This is not an exhaustive ranking or a promise of stock in every shop. Use the pictures to identify packaging, then match the complete name, including S1, S2, P2 or A. Flavour helps with administration; it does not establish effectiveness or lower risk.

These are Japanese label ranges, not recommended ages for starting self-treatment. The under-2 medical-care warning above applies throughout. “Under 7” excludes a child who has turned 7. Do not halve an older sibling’s dose for a younger child.

1. Cold syrups: fever ingredients plus other medicines

Already considering Pabron? The Pabron Kids guide covers its syrup, granules and tablets, including product-specific directions. Do not transfer directions between those forms.

2. Cough/phlegm syrups: no fever ingredient does not mean no overlap

3. Nasal syrups: different ingredients and upper age limits

Both list relief of sneezing, runny or blocked nose, watery eyes, sore throat and a heavy-headed feeling associated with acute rhinitis, allergic rhinitis or sinusitis. Symptom relief is not treatment of an infection. Persistent or recurring symptoms need their cause checked.

Recognise the names without memorising a chemistry list

• アセトアミノフェン: acetaminophen, also called paracetamol, relieves fever and pain. A familiar name does not mean the bottle contains only that ingredient.
• クロルフェニラミンマレイン酸塩: chlorpheniramine maleate, also called chlorphenamine, is an antihistamine for symptoms such as sneezing and a runny nose. The d- form is dexchlorpheniramine. Do not compare their milligram amounts as though they were interchangeable.
• デキストロメトルファン: dextromethorphan is a cough suppressant. Stona instead uses クエン酸チペピジン, tipepidine citrate; the same symptom claim does not mean the same formula.
• グアイフェネシン: guaifenesin helps loosen phlegm. dl-メチルエフェドリン塩酸塩, dl-methylephedrine hydrochloride, acts on the airways in some formulas or helps nasal congestion. Conditions such as heart disease, high blood pressure and thyroid problems warrant particular checking.
• Herbal and other ingredients: nandina fruit, platycodon root, senega, licorice and Stona’s maoto extract have roles within their formulas. Utsu nasal A adds belladonna alkaloids for runny nose/watery eyes and dipotassium glycyrrhizinate for inflammation. Herbal ingredients and vitamins do not make these medicines casual add-on supplements.

Every formula in the tables contains an antihistamine and carries drowsiness/dry-mouth cautions. Utsu nasal A also lists constipation and blurred vision. “Caffeine-free” does not mean non-drowsy; “sugar-free” does not mean risk-free. For an allergy history, check the complete inactive-ingredient list too, not just the stated fruit flavour.

My measuring reminder:
The volume used in an ingredient table and the volume for one dose are different things. Several products here list ingredients per 60mL; that is not a single dose. The same 5mL mark can hold different ingredients or amounts when you change bottles.

Acetaminophen and paracetamol are useful names to recognise, but do not transfer the mL dose from a familiar bottle at home. Even single-ingredient liquids overseas come in different strengths. Do not calculate a replacement paracetamol dose using a Japanese combination cold syrup.

Show the pharmacist everything already taken

Record the product, amount and time, including tablets, powders, suppositories, prescribed medicines, allergy medicines and travel-sickness products. Avoiding duplicate acetaminophen is only one part of the check.

• Cold syrups in the table: their leaflets prohibit other cold medicines, fever/pain medicines, sedatives, cough/expectorant medicines and oral antihistamine-containing medicines, including nasal, motion-sickness and allergy products.
• Both cough syrups: no other cough/expectorant medicines, cold medicines, sedatives or oral antihistamine-containing medicines, including nasal, motion-sickness and allergy products.
• Both nasal syrups: no other oral nasal medicines or oral antihistamine-containing products, including cold, cough/expectorant, motion-sickness and allergy medicines. Utsu nasal A additionally prohibits gastrointestinal antispasmodic medicines (胃腸鎮痛鎮痙薬).

Do not give MUHI cold, cough and nasal syrups together simply because the front labels name different symptoms. Ask a clinician or pharmacist to review the whole plan when symptoms overlap. Switching brands is not a way around dose intervals.

Measure first, then make it easier to take

1. Check the bottle every time: exact product, age band, single-dose volume, interval and daily limit. Follow that product’s directions. The comparison tables here are not dosing tables.
2. Measure with that product’s supplied cup. Do not estimate with a kitchen teaspoon, another medicine’s device or a capful. If markings are unclear, the cup is missing or your child cannot drink from it, ask a pharmacist to confirm a suitable mL-marked device and demonstrate its use.
3. Follow preparation instructions before measuring. MUHI’s herbal-containing syrups may form a sediment; their leaflets say to shake before use. Its brand guidance advises gentle inversion to make the contents uniform. Do not assume another medicine has the same shaking or dilution instructions.
4. Supervise and give small amounts gradually. MUHI’s guidance recommends a little at a time and no drinking directly from the bottle or cap, to avoid contamination. Write down the actual time and amount when caregivers share responsibility.
5. If medicine is spat out or vomited, do not automatically repeat a full dose. Note the product, amount, time and what happened, then ask a clinician or pharmacist. Do not double up to compensate.

“It is strawberry-flavoured, but my child still refuses it.”
That can happen. Ask at the pharmacy whether this exact medicine can be mixed with food and how to measure it. A flavour is a helpful design choice, not a promise that every child will like it. A whole bottle of drink can leave you unsure how much medicine was taken.

Storage, travel and when to stop

Keep the original bottle, box and leaflet; write down the opening date

The products require tightly closed storage in a cool place away from direct sun and out of children’s reach. Do not decant into a travel bottle. Follow the product’s cup-cleaning instructions, wipe the bottle neck and close the safety cap properly. A child-resistant cap does not replace safe storage. Syrup does not automatically mean refrigeration; use the bottle’s own storage directions.

• MUHI: use promptly after opening even within the printed expiry, and wash the measuring cup after each use and store it cleanly with the medicine.
• Pabron Kids: its leaflet specifies use within 6 months of opening and within the printed expiry. That is a storage limit, not permission for 6 months of continuous treatment or a rule for other brands.
• Utsu and Stona: follow their own expiry and storage instructions rather than borrowing Pabron’s 6-month limit. Do not use expired medicine. Ask a pharmacist about uncertain storage or a change not explained by the leaflet.

Doses versus days: the stopping rules differ

• The listed cold syrups and both cough syrups: stop and seek advice if symptoms have not improved after 5–6 doses.
• MUHI nasal S2 and Utsu nasal A: stop and seek advice after 5–6 days without improvement. This is not a reason to wait if your child is getting worse.
• A rash, redness, itching, vomiting or difficulty urinating after use: stop and seek advice with the leaflet. Stop and ask if dry mouth or drowsiness persists or worsens; the same applies to Utsu nasal A’s constipation or blurred vision.
• Breathing difficulty, altered consciousness, or a widespread rash with high fever or mouth/lip sores: seek immediate medical attention. For an accidental extra dose or an unknown amount swallowed, get prompt medical or poison-service advice rather than waiting for symptoms.

These medicines relieve symptoms and should not become a long-term daily drink. No bottle’s age range, flavour or character on the box can replace checking the child, the medicine and other treatment together.