Period pain and PMS medicine in Japan: a pharmacist's guide

"My period started while I'm traveling in Japan. Is there anything like Midol here?"

"Everything on the shelf is in Japanese — which boxes are for menstrual cramps?"

"Is there anything over the counter for PMS mood swings?"

These are questions foreign customers ask at Japanese pharmacy counters all the time. The short answer: Japan has a wide range of over-the-counter (OTC) options for both period pain and PMS — but there is no single "period pain shelf." Most pain relievers sit next to the headache medicines, and the PMS products are often in a separate "women's health" section. Without knowing the package conventions, it is easy to get lost.

This guide explains, from a Japanese pharmacist's perspective, how to choose a pain reliever for menstrual cramps, what Japan offers for PMS, how these products map to Western brands like Midol and Pamprin, and the warning signs that mean you should see a doctor instead.

A note on product details: Product names, ingredient amounts, and risk classifications in this article are current as of October 2026, based on package inserts and official manufacturer information. Formulations change, so always check the package before buying.

Quick reference: symptom × product

The basics: three types of period pain medicine in Japan

Japanese OTC options for menstrual cramps fall into three broad groups.

NSAIDs (non-steroidal anti-inflammatory drugs). Ibuprofen and loxoprofen reduce the production of prostaglandins, the substances that trigger menstrual cramps. These are the most commonly chosen ingredients for period pain in Japan. Note that the package inserts for ibuprofen and loxoprofen products (EVE, Loxonin S, Bufferin Luna i, Elpain and others) say they must not be taken within 12 weeks of your due date in pregnancy.

Acetaminophen (paracetamol). Known from Tylenol and Panadol. Gentler on the stomach, and an option for people who cannot take NSAIDs. See our guide to acetaminophen in Japan for details.

Pain reliever + antispasmodic combinations. For the twisting, cramping type of lower-abdominal pain, Japan has a dedicated product that pairs ibuprofen with butylscopolamine, an antispasmodic that relaxes excessive smooth-muscle tension.

One practical tip: Japanese manufacturers' own dosing guidance says to take the medicine "early, when the pain starts." Always stay within the labeled number of doses per day and the minimum interval between doses.

The main products, explained by a pharmacist

EVE A (イブA錠) — the household name for period pain

• Ingredients (per dose of 2 tablets): ibuprofen 150 mg + allylisopropylacetylurea 60 mg + anhydrous caffeine 80 mg
• Class: Designated Class 2 (ages 15+)

EVE is one of the first brands Japanese consumers name for period pain. Note that it contains a sedative ingredient (allylisopropylacetylurea), so it can cause drowsiness — do not drive after taking it.

The lineup has several variants: EVE A EX raises ibuprofen to 200 mg per dose, and EVE Quick is a version that contains magnesium oxide. The boxes look similar, so check the ingredient panel.

Loxonin S (ロキソニンS) — for stronger pain

• Ingredients (per tablet): loxoprofen sodium hydrate 68.1 mg (equivalent to 60 mg anhydride)
• Class: Class 1 (ages 15+)

Loxonin S contains the same dose of loxoprofen as the prescription version used in Japanese clinics, and menstrual pain is among its approved uses. Because it is a Class 1 medicine, you can only buy it when a pharmacist is on duty, handed over at the counter — the boxes on the shelf are usually empty display dummies. Our Loxonin S guide covers the details, and our painkiller shopping guide explains the buying process step by step.

Bufferin Luna i (バファリンルナi) — the dual-ingredient option

• Ingredients (per dose of 2 tablets): ibuprofen 130 mg + acetaminophen 130 mg + anhydrous caffeine 80 mg + dried aluminum hydroxide gel 70 mg
• Class: Designated Class 2 (ages 15+)

Marketed specifically for period pain and headache, this combines ibuprofen and acetaminophen, with an antacid to protect the stomach. It contains no drowsiness-causing sedatives, which makes it a practical choice if you need to stay alert (individual responses vary).

Elpain (エルペインコーワ) — Japan's cramp-specific option

• Ingredients (per tablet): ibuprofen 150 mg + butylscopolamine bromide 10 mg
• Class: Designated Class 2 (ages 15+; 1 tablet per dose, up to 3 times daily, at least 4 hours apart)

Elpain is unusual: the package literally says "for menstrual pain only" (生理痛専用). The antispasmodic butylscopolamine targets the twisting lower-abdominal cramps, and the approved indication is menstrual pain, mainly when accompanied by soft stools. If your main symptom is a headache, this is not the right pick — match the product to your symptom pattern.

Watch out: "Elpain Kowa α" has a different dose and directions. Elpain Kowa α (エルペインコーワα, Designated Class 2), a sister product, contains 200 mg of ibuprofen plus 10 mg butylscopolamine bromide per tablet. Its directions are 1 tablet per dose, up to 2 times a day (a 3rd dose is allowed only if symptoms come back), at least 4 hours apart. It is a separate product from the original Elpain (150 mg ibuprofen, up to 3 times a day), so check for the "α" on the box and read the package insert.

Tylenol A (タイレノールA) — when you need to avoid NSAIDs

• Ingredients (per tablet): acetaminophen 300 mg
• Class: Class 2 (ages 15+)

The option for people with sensitive stomachs or a history of NSAID-induced asthma or allergy. If you are pregnant or breastfeeding, do not self-select a pain reliever — read our pregnancy and breastfeeding OTC guide and talk to a pharmacist or doctor.

Name traps: similar names, very different medicines

Japanese OTC brands often have near-identical names with completely different ingredients. Three traps to know in this category:

1. Inochi no Haha A vs. Inochi no Haha White. Both are herbal products from Kobayashi Pharmaceutical (Class 2), but they target different life stages. Inochi no Haha A (brown package) is formulated for menopausal complaints, with 13 herbal ingredients plus vitamins. Inochi no Haha White (white package) is for period-related complaints such as menstrual pain, irregular periods and cold sensitivity, with 11 herbal ingredients. If your concern is your period rather than menopause, you want White. They usually sit side by side on the shelf.

2. Bufferin A vs. Bufferin Luna i. Bufferin A's active ingredient is aspirin; Bufferin Luna i is ibuprofen + acetaminophen. Same brand, different drug — important if you have an aspirin allergy.

3. Bufferin Luna i vs. Bufferin Luna J. Luna i is for ages 15+. Luna J is an acetaminophen-only chewable that children from age 7 can take, with age-based dosing. Never give adult NSAID products to anyone under 15 — see our children's OTC guide.

OTC options for PMS and other period-related complaints

Irritability, low mood, breast tenderness, and headaches in the week or two before your period are typical premenstrual syndrome (PMS) symptoms. Separately from painkillers, Japan has an OTC medicine approved specifically for PMS, as well as herbal and kampo products for period-related complaints.

Prefemin (プレフェミン) — an OTC medicine approved for PMS

• Ingredient (per tablet): chasteberry (Vitex agnus-castus) dry extract 40 mg
• Class: Class 2 (women 18+; 1 tablet once daily)

A Western herbal medicine whose active ingredient is chasteberry extract, marketed in Japan as a treatment for premenstrual syndrome. It used to be in a category that required a pharmacist to sell it, but was reclassified as Class 2 in 2023, so it can now be bought online as well as in stores. The approved indication is relief of premenstrual symptoms: breast tenderness, headache, irritability, short temper, and mood changes.

Chasteberry is not a quick-acting painkiller. It is taken every day at a set time. According to the package insert, if you start right after your period begins you are likely to notice improvement within about a month; if there is no improvement after about one month, stop and consult a pharmacist or doctor, and if you continue beyond three months, check in with a doctor regularly. It must not be used while breastfeeding, and it is not intended for use during pregnancy. If you have used chasteberry/vitex supplements at home, note that in Japan this is regulated as a medicine with a standardized dose.

Inochi no Haha White (命の母ホワイト) — an 11-herb women's health medicine

• Ingredients (per daily dose of 12 tablets): powders of 11 crude herbs, including Japanese angelica root, peony root, cnidium rhizome, cinnamon bark and rhubarb
• Class: Class 2 (ages 15+; 4 tablets, 3 times a day after meals)

Its approved indications are menstrual pain, irregular periods, hysteria, lower back pain, headache, anemia, cold sensitivity, chi-no-michi-sho (physical and emotional symptoms such as irritability linked to hormonal changes around periods, pregnancy, childbirth and menopause), stiff shoulders, dizziness, palpitations and vaginal discharge.

PMS itself is not one of its listed indications. If premenstrual mood symptoms are your main concern, Prefemin is the product approved for that; Inochi no Haha White is an option when you have a wider mix of period-related complaints such as cramps and cold sensitivity.

Because it contains rhubarb, ask before buying if you have a sensitive stomach or get diarrhea easily. The label says not to take it while breastfeeding, or to avoid breastfeeding if you do.

Kampo (traditional herbal) options — three classic formulas

Japanese drugstores carry OTC kampo medicines (Class 2) for gynecological complaints. Three formulas are so established they are nicknamed the "three major women's kampo":

Kampo is chosen according to your overall constitution ("sho"), not just one symptom. Our kampo OTC primer explains how this works. When in doubt, ask the pharmacist or registered seller at the store.

Mapping Western products to Japanese shelves

There is rarely an exact one-to-one match, so think in ingredients rather than brands.

For 30+ US brands and their Japanese counterparts, see our US OTC brands FAQ.

One important difference: oral contraceptives, including low-dose pills used for dysmenorrhea, are prescription-only in Japan. You cannot buy them at a drugstore. If you take them at home and plan a long stay, find a gynecologist early — our guide to seeing a doctor in Japan explains the process.

When to stop self-treating and see a doctor

Period pain is not something you simply have to endure. Consider seeing a gynecologist rather than continuing OTC medication if any of these apply:

• Pain that does not respond to a properly dosed OTC pain reliever, or that worsens year after year
• Pain severe enough to keep you in bed or away from work or school every month
• Unusually heavy bleeding or frequent large clots
• Lower-abdominal pain or irregular bleeding outside your period
• You find yourself taking pain relievers 10 or more days per month

Severe period pain can be a sign of underlying conditions such as endometriosis. "OTC painkillers don't touch it" is itself a reason to get checked.

Buying tips at the drugstore

• Class 1 (Loxonin S): only sold when a pharmacist is present; the questions at the counter are a legal requirement and take only a moment.
• Designated Class 2 / Class 2 (EVE, Elpain, Prefemin, Inochi no Haha, etc.): pick them up from the shelf yourself; also available at stores with a registered seller and online.
• English support varies by store. Showing the ingredient name on your phone — "ibuprofen," "acetaminophen" — works well.
• For store types and tax-free rules, see our Japanese pharmacy types guide.

FAQ

Q. Can I take a painkiller and Prefemin together? A. The ingredients do not overlap, but interactions with your health conditions and other medicines should be checked — ask the pharmacist or registered seller when you buy.

Q. Will period painkillers stop working if I use them every cycle? A. Used within the labeled dosage for a few days per cycle, loss of effectiveness is not generally expected. But if you need pain relievers 10+ days a month, that is a signal to see a doctor, not to switch products.

Q. Inochi no Haha White or Prefemin — which one? A. Prefemin if premenstrual symptoms (irritability, mood swings) are your main complaint — it is the one approved for PMS. Inochi no Haha White does not list PMS as an indication; it is an option for a wider mix of period-related complaints such as cramps, cold sensitivity and irregular periods. When unsure, ask at the counter.

Q. Is there anything for teenagers under 15? A. Acetaminophen products such as Bufferin Luna J (from age 7, with age-based dosing) are the option. Adult NSAID products must not be used under age 15.

Sources

• Package inserts for each product (PMDA OTC drug database)
• Official product pages: SSP (EVE), Daiichi Sankyo Healthcare (Loxonin S), Lion (Bufferin Luna i / Luna J), Kowa (Elpain), Zeria (Prefemin), Kobayashi Pharmaceutical (Inochi no Haha series)
• Ministry of Health, Labour and Welfare: OTC drug classification and sales rules
• Japan Society of Obstetrics and Gynecology: public information on dysmenorrhea and PMS

Disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult a licensed pharmacist or physician before taking any medication. Product information is current as of October 2026.