Educational information, not medical advice — ask your doctor or midwife.
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What is Shishihakuhito? It is a Japanese Kampo formula with a long history. It blends three plants: gardenia fruit (shishi), phellodendron bark (ohaku) and licorice root (kanzo).
Old texts used it for yellow skin and yellow eyes (jaundice) with a feeling of inner heat. It was also used for hot, red, itchy skin.
Japan's Ministry of Health, Labour and Welfare (MHLW) lists 148 Kampo formulas. The national health insurance (NHI) plan pays for these. This formula is on that list, so a Japanese doctor can prescribe a set-strength extract.
It is one of the less-used formulas. Only a few makers produce it.
Here is the honest verdict on proof. We found no published human trial of this formula, so its evidence grade is insufficient. What stands behind it is long recorded use in the Chinese and Japanese herb traditions.
Long use is not proof that something works. That point holds for everything below, and we do not repeat it in each part.
One thing matters more than any dosing detail. Yellow skin or yellow eyes can mean the liver or bile ducts are in trouble. It always needs a doctor, not a herb you buy on your own.
How is it thought to work? In Kampo theory the formula clears "damp-heat" from the body. Kampo doctors link damp-heat to yellow skin, dark urine, restlessness and hot itchy rashes.
That is a traditional model of the body. It is not a description of measured biology.
Lab and animal work gives partial hints, not proof. Geniposide from gardenia has been studied for bile flow and swelling in animals. Berberine from phellodendron calms swelling and fights germs in the test tube.
None of this has been tested in people taking Shishihakuhito. Effects seen in a dish or a rodent often do not carry over. Treat any mechanism you read here as an idea still to be tested.
The best-understood ingredient action is an unwanted one. Glycyrrhizin from licorice can make the body hold on to sodium and lose potassium. Doctors call this pseudoaldosteronism (a licorice effect that copies a hormone problem).
The result can be higher blood pressure, swelling and weak muscles.
What forms does it come in? In Japan it usually comes as a dried extract granule. The granules come in single-dose sachets, given on prescription.
Some makers supply a fine powder or a tablet.
Outside Japan you may find a loose crude-herb mix. You simmer that mix to make a decoction (a herbal tea). You may also find imported granules sold under the Chinese name.
Quality and herb ratios vary by supplier. Products sold under the Chinese name may hold different amounts of licorice.
Where does it come from? The formula appears in the Shang Han Lun, a Chinese medical classic from about 200 CE. There it is called Zhi Zi Bai Pi Tang, and it was given for fever with yellow skin.
Japanese doctors took up the Shang Han Lun formulas in the Edo period (1603-1868). The Japanese name Shishihakuhito comes from that line.
Today it lives on as a minor Kampo prescription, still on the official list.
Some reactions to Shishihakuhito need urgent care. Call your local emergency number or go to an emergency department straight away — do not wait to see whether it passes.
See a doctor straight away if your skin or the whites of your eyes turn yellow, if your urine turns dark, if your stools turn pale, or if you have pain under your right ribs. Those are liver and bile-duct warning signs and they need tests, not herbs.
Stop the formula and get medical help the same day if you notice swelling in your ankles or face, sudden weight gain, a rising blood pressure reading, unusual muscle weakness or cramps, numbness, or a pounding or irregular heartbeat. These can be signs that the licorice in it has pushed your potassium too low.
Get urgent care for severe muscle pain with dark brown urine, or for a spreading rash, facial swelling or trouble breathing.
Book a routine appointment if your skin problem or itching has not improved after two weeks, if you develop ongoing belly pain or constipation, or if you want to keep taking it for longer than a short course and need your blood pressure and potassium checked.
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 Shishihakuhito 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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