Educational information, not medical advice — ask your doctor or midwife.
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Jia Wei Wu Yao Tang is a Chinese herb formula. Its English name is Augmented Lindera Decoction. It is counted as a single drug, though it holds several herbs boiled together as one mix.
The main use is period pain. Herbalists pick it when cramps feel dull and cold, and a warm pack helps. It is also used for cramping pain low in the belly or groin.
Here is the short verdict. The formula has a long past in Chinese women's care, but we found almost no sound human trial data. A long history of use is not proof that a remedy works.
No one has shown how this formula acts in the body. The old idea is that it warms the lower belly and frees stuck qi (the body's flow of energy). That idea comes from old texts, not from lab work.
Lab and animal work gives a few hints. Corydalis (Yan Hu Suo) holds alkaloids (plant chemicals) that dull pain in animal tests. Nut grass and Lindera root may calm womb muscle in lab dishes.
Lab dishes are not people. No sound human study has tracked these steps in a woman who drinks the tea.
You will meet it in three main forms.
The classic form is a decoction, a strong tea made by boiling the raw herbs in water. Dried extract granules that you stir into hot water are the most common modern form. Some makers also sell pills or capsules.
Granules and pills are weaker per gram than a fresh decoction, so doses differ by product. Follow the pack, or the plan your herbalist writes for you.
The recipe is usually credited to Chinese texts on women's health from the Ming era, around the 1600s. It is built on an older base formula named after Wu Yao, the Lindera root.
It has stayed in use in Chinese herbal practice ever since, mostly for painful periods. It is taught in modern Chinese medicine schools and sold as a ready-made granule.
See a doctor if your period pain is new, is much worse than usual, or keeps you off work or school. Get seen the same day for very heavy bleeding, fever, or pain with fainting.
Stop the formula and ring a doctor if your ankles swell, you put on weight fast, you get bad headaches, or your heart races or skips. Those can be signs of the licorice effect on your blood pressure and potassium.
Also stop and get help if you bruise or bleed easily, your skin or eyes turn yellow, or you pass much less urine than normal.
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 Jia Wei Wu Yao Tang 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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