Educational information, not medical advice — ask your doctor or midwife.
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Tian Zhu Huang is a single herb used in Traditional Chinese Medicine. It is the hard, pale, chalky lump that forms inside the stems of some bamboo plants. In English it is called bamboo silica, tabasheer or Concretio Silicea Bambusae.
In TCM it is used to clear what practitioners call "phlegm-heat" and to calm fright. It was given to children with high fever, fits and restless sleep. It is also used for cough with thick, sticky phlegm.
It is almost never taken alone. In practice it is one part of a formula, often a ready-made children's pill or powder.
Here is the evidence verdict. Tian Zhu Huang is a long-standing staple of Chinese medicine, but good human trials of it are essentially absent. Long traditional use is not proof that a remedy works, and that applies to everything on this page.
The honest answer is that nobody has shown how it works in people. No clear mechanism has been established for Tian Zhu Huang.
In TCM theory it is a cool, sweet herb. It is said to clear heat from the heart and lungs, thin phlegm, and settle wind that causes twitching or fits. That is a traditional model, not a biological one.
Chemically, most of the lump is silica, the same basic material as sand and glass. Silica of this kind is poorly soluble and largely passes through the gut. That makes a strong drug-like effect unlikely, though this has not been tested directly.
Some laboratory work in China has looked at compound formulas that contain it, mostly for cough and fever. Those studies cannot tell you what this one herb does. Whether any of it carries over to people is not established.
You will meet Tian Zhu Huang in a few forms:
Raw lumps or broken pieces, sold by weight to practitioners.
Fine powder, swallowed with water or stirred into a formula.
Sliced pieces cooked into a decoction (a boiled herb tea).
Granules and ready-made pills, mainly Chinese children's patent medicines for fever, cough and restlessness.
Single-herb capsules sold online. These are uncommon and their contents are hard to verify.
Tian Zhu Huang has been in the Chinese materia medica for over a thousand years. It appears in Song dynasty texts, including the Kai Bao Ben Cao of around 973 CE.
Classical doctors valued it for childhood fright, fits and phlegm. The same uses run through later texts and into modern Chinese practice.
The substance is also known in South Asia and Persia as tabasheer, where it had its own traditional standing.
Call emergency services if someone has a fit, cannot be woken, or has a fit lasting more than five minutes.
Get urgent care for a stiff neck, a rash that does not fade under pressure, trouble breathing, or a baby under three months with a fever.
See your doctor if a cough lasts more than three weeks, if you cough up blood, or if a child is unusually floppy or will not feed.
Stop the herb and ask a doctor if you get a rash, ongoing diarrhoea or any new symptom after starting it.
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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