Educational information, not medical advice — ask your doctor or midwife.
Dang Gui Nian Tong Tang is an old Chinese herbal formula. Its name is often given in English as Chinese Angelica Decoction to Pry Out Pain. It is used for hot, swollen, aching joints and for sore, damp, itchy skin on the legs.
It is a single drug (TCM formula). That means the herbs are used as one fixed recipe, not as a pick-and-mix of separate supplements. Most people take it as a tea boiled from dried herbs, or as granules stirred into hot water.
Here is the short verdict. In Chinese medicine the formula has a long and steady track record. But long use is not proof that a thing works, and we could not find solid human trials for this one.
No one has shown how this formula acts in the body. That is the honest starting point.
In Chinese medicine terms, it is said to clear damp heat (a pattern of heat plus swelling and wetness) from the joints and skin. At the same time it is said to build blood and support the stomach, so the cooling herbs do not weaken you.
In lab dishes and in animals, single herbs from the recipe calm swelling. A few may help the body pass more uric acid, the waste that forms crystals in gout. Lab and animal results often do not carry over to people.
So treat any effect as unproven. If you take it, watch how you feel and tell your doctor you are taking it.
Most people take it as a decoction, which is a tea simmered from a bag of dried herbs. A Chinese medicine doctor writes the mix for you and you boil it at home.
It also comes as granules that dissolve in hot water, and as pills or capsules. Granules are the form most often sold outside China.
The amount of each herb changes from maker to maker, so two products are not the same. Buy from a supplier that tests each batch for heavy metals and for hidden drugs.
The formula is credited to Zhang Yuansu and his student Li Dongyuan in China, around the 12th to 13th century. It belongs to the school of doctors who focused on the stomach and spleen.
Since then it has been used for hot, heavy, swollen legs and joints, and for weeping sores on the lower body. It is still taught and prescribed in China, Taiwan, Japan and Korea today.
Some reactions to Dang Gui Nian Tong Tang need urgent care. Call your local emergency number or go to an emergency department straight away — do not wait to see whether it passes.
Stop taking it and get medical help the same day if your skin or the whites of your eyes turn yellow, your urine turns dark, or you get bad pain in your upper right belly. These can be signs of liver harm.
Call a doctor if your ankles or face swell, if your blood pressure climbs, or if your muscles feel weak or keep cramping. Those can be signs that your potassium has dropped.
Get emergency help for a fast, thumping or uneven heartbeat, chest pain, fainting, unusual bleeding or bruising, or a rash with swelling of the lips or trouble breathing.
Also see your doctor if joint pain and swelling get worse, or if a skin sore spreads, smells bad or will not heal.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
What it is typically used for, usual dose, cautions, and the study behind it where real trial data exists.
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