Japan offers a unique mix of modern NSAIDs, gentle paracetamol doses, and centuries-old Kampo herbal formulas. This guide will take foreign residents and visitors through how to choose, buy, and use fever medicine in Japan, both safely and cost-effectively.
The Basics of Japanese Antifever Medicines
Before grabbing a familiar brand, note that Japan regulates dosages conservatively and leans heavily on pharmacist guidance. Average over the counter tablets contain 100 mg of ibuprofen or 300 mg of acetaminophen, about 30 % lower than many Western equivalents.
Always monitor your temperature: if a fever tops 38.5 °C (101.3 °F) or lasts more than three days, seek medical advice.
Key Over The Counter Ingredients
| Ingredient | Japanese Name | Typical Adult Dose per Tablet | Notes |
|---|---|---|---|
| Paracetamol | アセトアミノフェン | 300 mg | Gentler on the stomach |
| Ibuprofen | イブプロフェン | 100 – 200 mg | Fast anti-inflammatory effect |
| Loxoprofen | ロキソプロフェン | 60 mg | Stronger than ibuprofen, but tough on the liver. |
Over-the-Counter Options
First-time visitors should be aware that Type 2 OTC drugs can be picked up freely, whereas Type 1 OTC drugs require a quick counselling session, and sometimes a signature of consent.
Ibuprofen-Based Brands
- Eve Quick DX, Bufferin Premium
- Adult dose: 2 tablets (200 mg ibuprofen). Take after food to protect the stomach and never mix with alcohol.
Acetaminophen-Based Brands
- Tylenol A, Lulu Attack EX
- Tylenol supplies 300 mg per tablet. Lulu adds vitamin B₆ and herbal extracts for fatigue relief.
Kampo Herbal Formulas
- 葛根湯 (Kakkontō) for the “chill‐and-stiff-neck” stage of a cold.
- 小柴胡湯 (Shōsaikōtō) for lingering low-grade fevers.Caution: Kampo can interact with prescription drugs, so inform your pharmacist of any medication you take.
When to See a Doctor
If you have a high fever, as well as a stiff neck, rash, or dehydration warrants professional care. Show your 保険証 (health-insurance card) at check-in; national insurance covers 70 % of costs, keeping most consultations under ¥3,000.
2-1 Common Prescription Antifever Drugs
| Drug | Form | Indication | Typical Out-of-Pocket Cost* |
|---|---|---|---|
| Loxoprofen (Loxonin) | Tablets | Post-operative or bacterial fever | ¥650 – ¥900 (3 days) |
| Diclofenac | Suppository | Severe inflammatory fever | ¥700 – ¥1,000 |
| Intravenous Acetaminophen | IV drip | Hospitalized patients | +¥1,500 |
Preparing for a Clinic Visit
Bring allergy notes, residence card, and if visiting with children, the 母子健康手帳. Many clinics now accept credit cards, but small neighborhood places may still be cash-only.
3. Safe Shopping at Drugstores
Japanese drugstores sort products by symptom, with color-coded shelf tags.
3-1 Reading Labels
- 成分 (Seibun) = ingredient list
- 用法・用量 (Yōhō / Yōryō) = dosage instructions
- 第1類 = pharmacist must explain; 第2類 / 指定第2類 = self-selection allowed.
Children’s Medicine
Never split adult tablets. Look for 「小児用」 powders or syrups such as Bufferin Kids Syrup. Dosage is weight-based, so make sure to check the chart on the side panel.
Interaction Warnings
Avoid doubling up on ibuprofen or caffeine when taking multi-symptom cold remedies. If you use anticoagulants, consult a doctor before using any NSAID.
4. Buying After Hours or Online
- 夜間救急薬局: Dial #7119 in Tokyo (or #8000 nationwide for pediatric advice) to locate night-duty pharmacies.
- Online: Amazon Japan and @cosme SHOPPING ship most Type 2 drugs same-day in Kanto. Type 1 items require a simple online questionnaire with a licensed pharmacist.
Quick Reference Table
| Situation | Best First Step |
|---|---|
| Mild post-vaccine fever | Acetaminophen (Tylenol A) |
| Stiff neck and chills | Take kakkontō sachets |
| Fever of over 38.5 °C for 72 h | Visit your local clinic |
| A Child 12 kg with a fever of 38 °C | Take Bufferin Kids Syrup (per the label) |
| Fever in an adult at night | Call #7119, locate 夜間救急薬局 (Night Time Emergency Pharmacy) |
Key Take Aways
Managing a fever in Japan is straightforward once you understand dosage norms, drug classes, and when to seek help. Combine pharmacist advice with careful label reading, and you’ll stay comfortable—and safe—through cold season, vaccinations, or unexpected illnesses.
Note
Disclaimer: This article is for informational purposes only and does not constitute medical advice. We are not medical professionals. Always consult a qualified healthcare provider before starting any medication or treatment, especially if you have underlying conditions or are taking prescription drugs.
