Where to Buy
Most OTC painkillers in Japan are Class 2 (第2類) drugs, which can be purchased from the shelf at any pharmacy, drugstore, or convenience store. However, Class 1 products require the pharmacist counter.
For Class 1 drugs: Walk to the pharmacy counter (usually indicated with a sign reading 薬剤師 or 医薬品) and show the pharmacist the product name in Japanese: ロキソニンS. They will confirm suitability and complete the sale.
Major drugstore chains: Matsumoto Kiyoshi (マツモトキヨシ), Sundrug (サンドラッグ), Tsuruha Drug (ツルハドラッグ), Welcia (ウエルシア), Cosmos (コスモス). All stock the full range of OTC painkillers. These chains have stores near most tourist areas and major transit hubs.
Convenience stores: 7-Eleven, FamilyMart, and Lawson carry basic Class 2 painkillers (EVE, Bufferin, Norshin). Useful late at night when drugstores are closed. Do not expect Loxonin S.
For a broader overview of Japan's pharmacy system — including how Class 1, 2, and 3 drugs differ and what to expect at the counter — the Japan Pharmacy Guide has everything you need.
Useful Japanese Phrases for the Pharmacy
When buying headache or pain medicine in Japan, these phrases will help you communicate at the counter:
Remember: showing the Japanese text on your phone is often the most reliable approach. General-purpose translation devices have variable accuracy with pharmaceutical terms, and preparing text in advance avoids connectivity issues.
For more on navigating Japanese pharmacies, the Japan Pharmacy Guide covers the full OTC drug classification system and what to expect from pharmacist interactions.
Migraine-Specific Options
Standard OTC painkillers work for many people with migraine, but they are not migraine-specific treatments. In Japan:
- Triptans (スマトリプタン, sumatriptan) are prescription-only. They require a neurology or internal medicine clinic visit.
- Some migraine sufferers respond well to Loxonin S or EVE Quick DH taken early in the attack, before pain escalates.
- Caffeine-containing products (Norshin, Saridon) can enhance painkiller efficacy for some people with migraine.
If you have diagnosed migraine and take prescription triptans at home, bring your supply to Japan. Sumatriptan is not available OTC. If you run out or forget, see an internal medicine or neurology clinic.
Migraine triggers in Japan travelers:
- Jet lag and disrupted sleep (strong migraine trigger)
- Dehydration from walking long distances
- MSG sensitivity (some traditional Japanese foods are high in umami/MSG)
- Bright light and noise in busy tourist areas
- Alcohol (sake, shochu, beer are common triggers for susceptible individuals)
Managing triggers proactively — staying hydrated, maintaining sleep schedule as much as possible, wearing sunglasses in bright outdoor settings — is more effective than any OTC medicine.
When to See a Doctor
OTC painkillers are appropriate for typical headaches. Certain patterns require medical evaluation.
Seek immediate medical care for:
- A sudden, severe headache described as "the worst headache of my life" (possible subarachnoid hemorrhage — this is an emergency)
- Headache with high fever, stiff neck, and sensitivity to light (possible meningitis — emergency)
- Headache following head injury or fall
- Headache with confusion, weakness, or vision changes (possible stroke)
- Headache in someone over 50 with new pattern
See a doctor (non-urgent but important):
- Headaches occurring more than 15 days per month
- Painkillers are needed more than 10–15 days per month (medication overuse headache risk)
- Headache that wakes you from sleep regularly
- Progressive worsening over days or weeks
- Headache associated with significant nausea and vomiting that is not typical for you
Find an internal medicine clinic near you using our medical facility search. For suspected neurological issues, a neurology referral may be needed — internal medicine clinics can provide this in Japan.
FAQ
Q: Is EVE the same as Advil or Ibuprofen I buy at home?
A: EVE contains ibuprofen, the same active ingredient as Advil and Nurofen. The dose per tablet may differ slightly — EVE A contains 150mg ibuprofen per tablet (standard dose is 2 tablets = 300mg), while many Western products are 200mg per tablet. The drug itself is identical.
Q: Why is Loxonin S so popular in Japan if it's basically an NSAID like ibuprofen?
A: Loxoprofen has a prodrug mechanism that converts to active form in the body rather than in the stomach. This means somewhat less direct gastric irritation than some other NSAIDs. More importantly, many clinical users and pharmacists consider it to have stronger pain-relieving efficacy than standard-dose ibuprofen. It is also well-established in Japan — Loxonin has been used as a prescription drug in Japan since 1986 and has a strong safety record.
Q: Can I take Loxonin S and EVE together?
A: No. Both are NSAIDs. Combining two NSAIDs doubles the risk of gastric ulceration, kidney strain, and cardiovascular effects without meaningfully increasing pain relief. Take one or the other, never both.
Q: Are Japanese OTC painkillers weaker than what I use at home?
A: Japanese OTC doses tend to be at the conservative end of the range — EVE A is 300mg ibuprofen per dose vs the 400mg common in the US and UK. The drugs themselves are not weaker. If you find the standard Japanese dose insufficient, consult a pharmacist before exceeding it. Loxonin S at 60mg is considered equivalent in efficacy to 400–600mg ibuprofen for many pain types.
Q: I have a stomach ulcer history. What can I take for headache in Japan?
A: Acetaminophen (Tylenol Japan, Bufferin Ace T, Norshin) is the appropriate choice. NSAIDs (ibuprofen, loxoprofen, aspirin) are contraindicated with active ulcers or significant ulcer history. If you must take an NSAID, Loxonin S Plus includes a stomach-protective ingredient (sucralfate), but discuss this with a pharmacist first.
Q: Can I buy these medicines to take home to my country?
A: Personal-use quantities of OTC medicine can generally be taken home in carry-on or checked luggage. Be aware that Loxonin (loxoprofen) may be classified differently in your home country — it is prescription-only in many Western nations. Carry the original packaging and receipt. Declare medicines if required by customs. The dihydrocodeine in some EVE products could trigger scrutiny at customs in some countries — keep quantities minimal.