What is Sammotsuogonto?

Sammotsuogonto (also romanised Sanmotsu-ogon-to) is a three-herb Japanese Kampo formula taken as a bitter tea or granule powder. It is best known for one narrow, distinctive complaint: a hot, burning feeling in the palms and soles, classically in women after childbirth. Some practitioners also use it for dry, itchy skin in people who feel hot and restless.

It is one of the 148 Kampo formulas approved for reimbursement by Japan's Ministry of Health, Labour and Welfare (MHLW), so in Japan it is usually supplied on prescription by a doctor rather than bought off a shelf.

The honest evidence position: this formula has centuries of documented traditional use, but we could not identify a published controlled human trial of it. Long traditional use tells you a remedy has been valued and observed; it is not proof that it works. Treat the two things as separate questions throughout this page.

How does Sammotsuogonto work?

No one has shown, in people, how this formula produces its traditional effect. What follows is theory, not established fact.

In Kampo terms, the formula is described as clearing "heat" that has become trapped while the body's fluids are depleted — which is why the classical picture is burning palms and soles rather than a general fever.

In laboratory terms, the three roots contain compounds that damp down inflammation and calm overactive immune signalling in cells and in animals. Baicalin and baicalein from Ogon (Scutellaria root) are the most studied of these.

Laboratory and animal findings do not reliably predict what happens in a person taking a diluted herbal decoction. Take the mechanism above as a plausible story that has not been tested in humans.

What forms does Sammotsuogonto come in?

In Japan the usual form is a dried extract granule or fine powder, dispensed in single-dose sachets on prescription.

Other forms you may meet:

Raw herb decoction — the three sliced roots simmered in water and strained, prepared by a Kampo or Chinese medicine practitioner. Very bitter.

Extract tablets or capsules — less common, used by people who cannot tolerate the taste.

Outside Japan the formula is sold as a supplement in some markets. Those products are not covered by Japan's prescription standards, and the amount of actual herb in them varies a lot. If you buy one, choose a supplier that publishes third-party testing.

Where it comes from:

The formula traces to the classical Chinese text Jingui Yaolue (Essentials of the Golden Cabinet), attributed to Zhang Zhongjing around the 3rd century CE, where it appears for feverish heat in the limbs after childbirth.

Japanese Kampo physicians adopted it and kept it in regular use, widening it to burning palms and soles and to dry, itchy skin in people who run hot.

It survives today as one of the MHLW's 148 approved Kampo formulas, which is why Japanese doctors can prescribe it under national health insurance. It is used much less in modern Chinese practice than in Japan.

What does Sammotsuogonto help with?

• Burning, hot feeling in the palms and soles: This is the formula's signature use and the reason most Japanese doctors reach for it. The classical picture is hands and feet that feel hot to the person, often worse at night, with dry skin and thirst. We could not find a controlled trial testing it for this, so the support is traditional and clinical experience only.
• Feverish heat and restlessness after childbirth: The original classical text describes exactly this situation: heat and agitation in the limbs in the weeks after giving birth. Kampo practitioners still use it this way in Japan. There is no trial evidence. Fever after childbirth can signal infection, so this is a situation to be checked by a doctor rather than self-treated.
• Dry, itchy skin in people who feel hot: A later, broader use. Practitioners select it for itchy, dry skin — including some eczema-type rashes — in people whose overall picture is heat and dryness rather than cold and puffiness. Published support is limited to case reports and practitioner accounts, not controlled studies.
• Trouble sleeping because hands and feet feel hot: Traditionally the sleep problem is seen as a knock-on effect of the burning limbs, not a separate target. There is no human trial evidence for sleep. If poor sleep is your main problem, it deserves its own assessment.

Which foods are rich in Sammotsuogonto?

This is a prepared herbal formula, not a nutrient, so no food contains it.

What are the side effects of Sammotsuogonto?

• Nausea, stomach discomfort or loss of appetite
• Diarrhoea or loose stools
• Skin rash, redness or itching
• Rarely: liver injury, showing as yellow skin or eyes, dark urine, deep tiredness or pain under the right ribs
• Rarely: interstitial pneumonia (inflammation deep in the lungs), showing as a dry cough, breathlessness and fever

Good to know:

Most people who take this formula have no trouble with it, and the common problems are digestive and mild.

Two rare but serious reactions matter more than the common ones. Kampo formulas containing Ogon (Scutellaria root) have been linked in Japanese reporting to drug-induced liver injury and to interstitial pneumonia (inflammation deep in the lungs). Both are uncommon, both can develop weeks into treatment, and both need prompt medical attention.

This is why the safety rating on this page is "caution" and not "routine", and why Japan keeps these formulas on prescription.

How much Sammotsuogonto should you take?

• Recommended daily: For the Japanese prescription granule extract, the usual adult amount is about 7.5 g of extract granules per day, split into two or three doses. Follow the exact amount on your own package or prescription, because strengths differ between makers. For a raw herb decoction, amounts are set by the practitioner and are not something to work out yourself. Doses for children and for older or frail adults are reduced, and should be set by a prescriber.
• Best time of day: Split the daily amount across two or three doses, spaced through the day. Japanese practice is to take it before meals or between meals, with the last dose well before bed.
• With or without food: Standard Kampo practice is on an empty stomach — about 30 minutes before a meal, or between meals. Granules are usually dissolved in warm water. If it upsets your stomach, taking it just after food is a reasonable compromise; tell your prescriber.
• Time to effect: Practitioners generally expect some change in the hot, burning feeling within one to two weeks. Skin itching is described as slower. If nothing has changed after four weeks, it is unlikely to start working.
• How long to take it: Kampo practice is to review after two to four weeks. If the burning or itching has not shifted at all in that time, the formula is usually judged wrong for you and changed rather than continued. Do not take it for months on end without review. Long unsupervised use is where the liver and lung problems described below tend to be noticed late.