Si Miao Pian
( Dampclear™ )
Si Miao Pian
(Dampclear™ )
200 mg 200 Tablets | Item #: AH135P
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What does it do?
How to use it?
In the media
Si Miao Pian (Si Miao Wan, Dampclear™, Si Miao San, 四妙片) is a classic Chinese herbal remedy that clears Heat and eliminates Dampness in cases of Damp-Heat. This formula may be used to supprt healthy uric acid metabolism.
Best before date:
BBD Info3.2024
What does it do?

Supports Leg Comfort

Think what it would be like to be able to go for brisk walks again, free of discomfort. Or go up and down a flight of stairs with vigor. Think what it would be like just to go get the mail without the experience feeling like a trek up Mt. Everest. And think what a relief it would be going to the bathroom and having a strong urination without stopping and starting in fits.

Many people believe living with body discomfort and weakness is just a part of the normal aging process. But if you have joint discomfort and your lower extremities prevent you from living life to the fullest, our classic formula, DampClear™ may help.

Ancient TCM Formula Clears Heat and Removes Dampness

DampClear is an herbal traditional Chinese medicine (TCM) remedy. Chinese medicine doctors have historically dispensed this formula (known as Si Miao San in TCM) to regulate blood flow in the lower extremities; metabolize fluids; and support normal joint function.

Although Damp-Heat theory dates back several centuries, it applies more than ever to modern lifestyles. One major reason Damp-Heat develops is diet. Too much sugar, greasy and fatty foods (and sometimes spicy food, depending on your constitution) can lead to internal Damp-Heat.

When Damp-Heat accumulates in the body, according to TCM theory, it particularly affects the sensitive, hollow spaces, i.e. the joints. That's because Damp-Heat impedes the flow of Qi. Think about when you're on a cross-country or international flight. Your joints get stiff and discomforting from sitting for so long. Your circulation and life energy force--Qi--is impeded. (Just as you feel stiff in the lower body from flying, Damp-Heat first affects the lower extremities.) The result of this can manifest as redness around the feet, ankles or knees.

Dampness obstructs harmonious Qi flow and causes stiff joints and heavy limbs. As for Heat, it dries up the fluids and injures Yin. When fluids dry, it causes a vicious cycle, leading to more Dampness.

How Does DampClear Work?

The first herb in the formula, Huang Bo (Amur Cork Tree Bark) purges fire and resolves toxicity. Cang Zhu (Atractylodes Rhizome) dries dampness and strengthens the Spleen.

Next in the formula is Niu Xi (Achyranthes Root), which tonifies the Liver and Kidneys, and dispels stasis and unblocks the Channels. Yi Yi Ren (Coix Seed) clears heat and strengthens the Spleen and leaches out dampness.

These four herbs work synergistically to clear Damp-Heat. There's good reason that the classic formula for this is known as "four marvels pill.".

Does Research Support DampClear?

Many clinical studies have been conducted to evaluate the usefulness of the Si Miao San formula in supporting healthy uric acid metablism and supporting joint health with positive outcomes.1-3.


Qiu R et al., J Tradit Chin Med. 2008 Jun;28(2):94-7.
Shi XD et al., Chin J Integr Med. 2008 Mar;14(1):17-22. doi: 10.1007/s11655-007-9001.
Liu YF et al., Evid Based Complement Alternat Med. 2017;2017:6037037. doi: 10.1155/2017/6037037. Epub 2017 Mar 8.
Phellodendron bark(Phellodendron chinense)(Huang Bo)
Cang-zhu atractylodes rhizome(Atractylodes lancea)(Cang Zhu)
Achyranthes root(Achyranthes bidentata)(Niu Xi)
Job's tears seed(Coix lacryma-jobi)(Yi Yi RenВ )

Guang Ci Tang® Si Miao Pian (Dampclear™) 40 grams in 200 mg 200 tablets @ 5:1 strength.

At a true 5:1 concentration, this product represents the most potent form of Si Miao Pian (San/Wan) on the market. One tablet is equal to 1 gram of raw herb.

Please note that Guang Ci Tang® Si Miao Wan in the pill form, which has the same formulation as the tablet, is discontinued.

Si Miao Pian tablets are made with 100% natural herbs that are tested for authenticity, quality, and potency. A traditional water decoction is prepared with the herbs to reproduce the time-tested efficacy of the formula, and this water decoction is concentrated with our proprietary technology to form a potent extract that is made into easily absorbed tablets, which are remarkably effective, easy to use, and safe. The tablets are produced by Guang Ci Tang® in our state of the art cGMP-certified facility and imported in accordance with U.S. FDA guidelines. When you choose Guang Ci Tang® products, you are taking advantage of a wonderful fusion of science and tradition that incorporates the highest standards in the field of Chinese medicine today.

Check for an independent US lab test report.

Guang Ci TangВ® Advantages

Effective. Safe. Affordable

  • True 5:1 concentration
  • Double the strength of other brands
  • Minimal or no fillers and binders
  • No pharmaceuticals, sugar, or dyes
  • Comprehensive lab testing (e.g., heavy metals,etc.)
  • Made in a cGMP certified facility
  • Unbeatable value
  • Safely used in the USA since 1995
How to use it?

The standard dosage for Dampclear™ is 5 tablets each time, taken 2 to 3 times daily with or before meals. One bottle lasts 11 to 17 days. The dose may be doubled for a quicker and stronger response as needed. Consult your practitioner for precise dosage recommendations based on body weight and other factors.

Dampclear™ has a mild action and therefore it usually takes time before its effects become apparent.


Side effects

Si Miao Pian (Wan) has been safely used with few adverse effects when used as directed.


1. Not for use during pregnancy.


Dampclear™ is gluten free


Use with caution in conditions due to Yin deficiency.
Not suitable for joint discomfort with chilly sensation.
Consult your herbalist or physician before use if you are taking other medicines.
Keep out of reach of children.
In the media


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