What is Sanoshashinto?

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.

How does Sanoshashinto work?

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.

What forms does Sanoshashinto come in?

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.

Where it comes from:

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.

What does Sanoshashinto help with?

• Constipation with a full, tight feeling below the breastbone: This is the main traditional use, and the one with the clearest physical basis. Rhubarb root is a known laxative, so stools usually loosen within about 6 to 12 hours. The 'fullness below the breastbone' part is a Kampo way of picking who the mix suits, not a tested measure. No good human trial has compared this mix with a plain laxative.
• Flushing and hot rushes in the face and head: Classical Kampo texts list a red face and sudden heat as a core sign for this mix. Human trial evidence for flushing or hot flushes is very thin. Do not expect it to work like a treatment for menopause symptoms.
• Restlessness and trouble settling at night: Old texts describe an agitated, hurried state settled by this mix. This rests on tradition only. There are no good sleep or anxiety trials to point to.
• Nosebleeds and a tendency to bleed easily: Traditional use is strong here, and lab work shows some of the compounds affect blood vessels and clotting steps. That is not the same as proof in people. Repeated nosebleeds need a medical check, not self-treatment.
• Bleeding tendency in the upper gut (stomach and food pipe): Kampo texts use this mix for people prone to bleeding high in the gut, and some Japanese hospital reports describe it in that setting. The evidence is case reports, not controlled trials. Bleeding from the stomach or food pipe is a medical emergency and needs a hospital, not a herb.
• Head pressure and flushing linked to high blood pressure: In Japan the mix is sometimes given for the flushed, heavy-headed feeling that can come with high blood pressure. It is aimed at the feeling, not at the blood pressure number. It is not a replacement for blood pressure medicine, and no strong trial supports using it that way.

Which foods are rich in Sanoshashinto?

This is a medicinal mix of roots, not something found in food. Garden rhubarb stalk on your plate is not the same as the medicinal rhubarb root used here.

What are the side effects of Sanoshashinto?

• Loose stools or diarrhoea
• Belly cramps and griping pain
• Nausea and loss of appetite
• Yellow-brown or reddish urine colour, which is harmless
• Low potassium (a body salt) with long or heavy use, causing weakness and muscle cramps
• Dark staining of the bowel lining with long laxative use
• Skin rash or itching
• Rare liver injury, with yellow skin or eyes, dark urine and deep tiredness
• Very rare lung inflammation, with a dry cough, fever and breathlessness

Good to know:

Loose stools and cramping are the common problems, and they usually mean the dose is too high. Cutting the dose often fixes them.

The serious effects are rare but real. Liver injury and lung inflammation have both been reported with Kampo formulas that contain scutellaria root. Stop the mix and get medical advice if you notice yellow skin or eyes, a new dry cough with breathlessness, or lasting weakness.

How much Sanoshashinto should you take?

• Recommended daily: In Japan the usual adult dose of the dried extract granule is about 7.5 g a day, split into two or three doses. Many people need less, and some makers use different strengths, so follow the label. As a brew, a common daily set is roughly 1 to 2 g rhubarb root, 1 g coptis root and 1 g scutellaria root, steeped briefly in hot water. Start at the low end. Rhubarb dose is the part that decides whether you get a soft stool or cramping diarrhoea.
• Best time of day: Usually split between morning and evening, or taken in the evening if you want a bowel movement the next morning.
• With or without food: Kampo practice is to take it before meals or between meals, with warm water. If it upsets your stomach, taking it with a little food is reasonable.
• Time to effect: The bowel effect usually shows within 6 to 12 hours, often overnight. Any effect on flushing or restlessness, if it comes at all, is judged over days, not minutes.
• How long to take it: Short-term use only. Stimulant laxative herbs like rhubarb are not meant for daily long-term use, because the bowel can become sluggish and body salts such as potassium can drop. Reassess after about one week. If your stools have not improved, or you need it every day to pass a stool, stop and see a doctor.