
I’m Irene, a Taiwanese pharmacist working in a Japanese drugstore. A pocket-sized throat powder sounds convenient when you are travelling. But “no water needed” does not mean “take it like a sweet”. Let’s match the mint box first, then check the amount and the medicines already in your travel bag.
Find the mint 18-sachet box, not a throat sweet

The official product name is 即妙円ストレートM (Sokumyoen Straight M), a Japanese Class 3 OTC cough and phlegm medicine made by Sakamoto Kampo Pharmaceutical. Use the name and mint packaging together to identify it; do not apply these directions to the P product or similarly named throat sweets.
Its labelled indications are phlegm, cough, and hoarseness, a rough throat or throat discomfort caused by throat inflammation. A handy sachet is a packaging feature, not a reason to take medicine when you do not need it. “Herbal ingredients” also does not mean side-effect-free or suitable with every other medicine.
No water: dissolve slowly on the tongue
The whole sachet is the adult dose, not the dose for every child.
2 · Put that amount on the tongue.Let it dissolve slowly and pass into the throat. Take without water: the leaflet says taking it with water weakens its effect.
3 · Leave at least two hours between doses.The labelled frequency is six times a day. Do not shorten the interval or take extra to make up for a missed dose.

| Age | Amount per dose |
|---|---|
| 15 years and over | 1 sachet |
| 11–14 years | ⅔ sachet |
| 7–10 years | ½ sachet |
| 3–6 years | ⅓ sachet |
| Under 3 years | Do not take |
The six-times-daily frequency and minimum two-hour interval apply to the permitted age groups above. Children must take it under a parent or guardian’s supervision. If you are unsure how to divide a sachet correctly, ask the pharmacist or registered seller to explain before using it. An 18-sachet box is not a prescribed three-day course.
Check your travel medicines before adding this
While taking this product, do not use other cough/phlegm medicines, cold medicines, sedatives, or oral medicines containing antihistamines (including oral rhinitis medicines, motion-sickness medicines and allergy medicines).
Show the actual packages of medicines you use to a pharmacist or registered seller. A different brand name does not make a combination safe.
Consult a doctor, pharmacist or registered seller before taking it if you are under a doctor’s treatment, pregnant or possibly pregnant, have previously had an allergic reaction to a medicine or similar substance, or have a high fever.
When to stop and seek advice
- Stop immediately if you develop a rash, skin redness or itching; nausea, vomiting or loss of appetite; or dizziness. These may be side effects. Take the leaflet to a doctor, pharmacist or registered seller.
- If symptoms do not improve after 5–6 days of use, stop and consult one of those professionals with the leaflet. Do not keep buying more sachets instead.
Keep the opened sachet, not a loose powder container
Store in a cool, dry place away from direct sunlight and out of children’s reach. Do not transfer to another container. When part of a sachet remains, fold over its opening, store it and use it promptly. The leaflet does not specify an hourly storage limit. Do not use past the expiry date.
The medicine contains six powdered herbal ingredients. This is not a licence to combine it with other herbal or cold products. The current official leaflet also lists ethanol among the additives; anyone needing to avoid particular ingredients should check the full leaflet and ask a pharmacist before choosing it.
Show this at the counter
即妙円ストレートMのミント18包を探しています。年齢は[ ]歳です。今使っている薬はこちらです。使ってもよいか、1回量と分け方を確認したいです。
“I’m looking for the mint 18-sachet Sokumyoen Straight M. The person taking it is [ ] years old. These are the medicines they use. Please check whether it is suitable and explain the amount and how to divide it.”
My shortcut: match the box → check the medicines already being used → confirm the age-specific amount → dissolve slowly without water. Convenience should reduce confusion, not remove the safety check.


