Educational information, not medical advice — ask your doctor or midwife.
Sanoshashinto is a Japanese Kampo herb mix. It is made from three roots: rhubarb root, coptis root and scutellaria root. All three are yellow inside and taste very bitter.
Single drug (Kampo). That means you buy it as one finished formula, not as loose herbs you blend yourself. Its old name is 'Three-Yellow Heart-Draining Decoction'.
It is given for hard, dry stools along with a full, tight feeling just below the breastbone. Kampo doctors also use it for a red, flushed face, hot rushes, a restless mind, nosebleeds, and a tendency to bleed in the upper gut (the stomach and the tube above it).
Long use in a tradition is not proof that a remedy works. Good human trials of this mix are lacking, so most of what is claimed for it rests on tradition, not on tested results.
The short answer: the laxative part is well understood, the rest is not.
Rhubarb root holds compounds called anthraquinones. They pull water into the bowel and nudge it to move. This is why the mix softens stools within hours.
Coptis root holds berberine and scutellaria root holds baicalin. In lab dishes and in animals, both calm swelling and redness (inflammation) and slow some bleeding. Whether that happens in a person who drinks the tea is not known.
In Kampo thinking, the mix drains 'heat' from the upper body and settles a rushing, flushed feeling. That is a traditional idea about the body, not a tested one. Treat it as a way of choosing the remedy, not as a proven action.
Most people in Japan take it as a dried extract granule or powder, stirred into hot water. Tablets and capsules are also sold.
The old way is a short brew. The roots are steeped in just-boiled water for a few minutes, not boiled hard. A long boil pulls out more of the harsh laxative part.
In Japan the granule form is an approved medicine, so a doctor can prescribe it. Outside Japan it is usually sold as a supplement, and strength is less tightly checked.
The formula comes from a Chinese medical book, the Jingui Yaolue, written about 1,800 years ago. In Chinese practice it is known as Xie Xin Tang.
Japanese Kampo doctors took it up and still use it today. Japan lists it among its approved Kampo formulas, so it is a long-standing staple rather than a fringe remedy.
Old texts point to one picture: a flushed, hot, restless person with a full feeling under the breastbone and stools that will not pass.
Some reactions to Sanoshashinto need urgent care. Call your local emergency number or go to an emergency department straight away — do not wait to see whether it passes.
Call emergency services now if you vomit blood, vomit something that looks like coffee grounds, or pass black tarry stools. These are signs of bleeding in the gut.
Stop taking it and see a doctor the same day if your skin or the whites of your eyes turn yellow, your urine turns dark, or you feel deeply tired and sick. These can be signs of liver injury.
Stop and see a doctor if you get a new dry cough, fever or breathlessness, which can point to lung inflammation.
See a doctor soon if you have bad belly pain, diarrhoea that will not stop, muscle weakness, cramps or a fluttering heartbeat. Also see a doctor if constipation lasts more than a week, or you notice blood in your stool, weight loss you cannot explain, or a lasting change in your bowel habit.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
Reviewed by the HealisticMD editorial team How we grade evidence →
The published evidence for Sanoshashinto is weak or absent. That usually means no controlled trial has tested it, not that a trial found it ineffective — the two are different, and we grade only what has been published.
What it is typically used for, usual dose, cautions, and the study behind it where real trial data exists.
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