Treatment in Japan: Tamiflu, Xofluza, and More
Japan's approach to influenza treatment is distinctive and often surprises foreign visitors.
Antiviral medications commonly prescribed in Japan:
Important note on Tamiflu and neurological effects:
Japan's package insert for Tamiflu includes warnings about rare behavioral abnormalities, particularly in adolescents. Doctors may advise that children and teenagers not be left unsupervised for 2 days after taking Tamiflu. This precaution reflects Japanese regulatory guidance; international medical consensus does not firmly establish causation, but the caution is worth knowing.
Supportive care:
- Rest is critical — most Japanese employers and schools expect patients to stay home for the duration of fever plus one extra day
- Stay hydrated with water, sports drinks, or OS-1 rehydration solution
- Fever reducers like acetaminophen (アセトアミノフェン) are appropriate; avoid aspirin in children
- Japanese pharmacies sell cold/flu symptom relief medications (総合感冒薬) over the counter, though they are symptom relievers, not antivirals
Which Department to Visit and How to Find a Clinic
For influenza in Japan, visit:
- 内科 (Naika) — Internal Medicine (most common choice for adults)
- 耳鼻咽喉科 (Jibi inkōka) — ENT (if you have severe sore throat or ear pain alongside flu)
- 小児科 (Shonika) — Pediatrics (for children)
Clinic etiquette for flu patients in Japan:
Many clinics in Japan ask flu patients (and anyone with fever) to wait in a separate waiting area or outside to prevent spreading the virus to other patients. Some require you to call ahead. It is polite to wear a surgical mask (マスク, *masuku*), which you can purchase at any convenience store for under ¥200.
Use Traveler's Hospital to find English-speaking internal medicine clinics near your location in Japan.
Cost Estimate
Without Japanese national health insurance, travelers pay the full unsubsidized cost (jiko futan 10/10). Travel insurance will typically reimburse all medical expenses — retain all receipts, prescription slips, and the clinic's official receipt (領収書, *ryoshusho*).
Prevention: Flu Shots in Japan
Can travelers get a flu vaccine in Japan?
Yes. Influenza vaccines (インフルエンザワクチン, *infuruenza wakuchin*) are widely available at internal medicine clinics and pharmacies in Japan from October through December. The cost is approximately ¥3,000–¥4,500 per dose (adults). No appointment is always necessary, and some walk-in clinics offer same-day vaccination.
Other prevention measures:
- Wear a surgical mask in crowded, enclosed spaces (trains, elevators, tourist attractions)
- Wash hands thoroughly and frequently; Japan has hand sanitizer dispensers at the entrance of most hospitals, restaurants, and tourist attractions
- Avoid touching your face
- Maintain distance from visibly sick individuals
Japanese Phrases to Use at the Clinic
Related Resources
Frequently Asked Questions
Q: Do I really need a prescription for Tamiflu in Japan?
A: Yes. All antiviral influenza medications in Japan — including Tamiflu, Xofluza, Relenza, and Inavir — require a prescription from a licensed physician. They are not available over the counter. You must visit a clinic for examination and a positive (or clinically suspected) flu diagnosis.
Q: How accurate is the rapid flu test in Japan?
A: Rapid tests are most accurate when performed 24–48 hours after symptom onset. Sensitivity is approximately 50–70% in the early hours, rising to 80–90% by day 2. A negative result combined with classic flu symptoms may still result in an antiviral prescription at the doctor's discretion.
Q: Is Xofluza (Xofluza) available outside Japan?
A: Xofluza (baloxavir marboxil) was developed by Shionogi, a Japanese pharmaceutical company. It is now approved in several countries including the US, but Japan remains one of the most common places tourists first encounter it. The single-dose convenience makes it especially popular in Japan.
Q: Can I bring Tamiflu from my home country to Japan?
A: Yes, you may bring personal supplies of Tamiflu into Japan for personal use. Quantities up to a 2-month supply are generally permitted without special import permission. Keep medications in original packaging with a prescription label if possible.
Q: Should I go to the emergency room if I have the flu?
A: Emergency rooms are typically not needed for uncomplicated influenza. Seek emergency care only for: difficulty breathing, chest pain, confusion or altered consciousness, inability to keep fluids down, or if symptoms worsen sharply after initially improving. Outpatient clinics handle the vast majority of flu cases effectively.
Q: How many days should I rest with the flu in Japan?
A: Japanese medical guidance typically recommends staying home until you are fever-free for at least 24 hours (without fever-reducing medication). For a typical flu, this means 5–7 days of rest from symptom onset. Schools legally prohibit attendance until specific criteria are met under Japanese infectious disease regulations.