Shi Chang Pu

What Is Shi Chang Pu?

Shi Chang Pu, whose pharmaceutical name is Acori Tatarinowii Rhizoma, is the dried rhizome of Acorus tatarinowii, an aromatic perennial that grows in damp, shaded ground beside mountain streams. The rhizomes are dug in autumn and winter, washed of their many fibrous roots, and dried; they are curved, knotted, reddish-brown, and strongly fragrant with a slightly bitter, pungent taste. In pinyin it is called Shi Chang Pu, and in English it is called grassleaf sweetflag rhizoma or acorus rhizome.

TCM Properties and Actions

Shi Chang Pu is warm in nature, with acrid (pungent) and bitter flavors. In traditional Chinese medicine it enters the Heart and Stomach channels. Its recorded action is to open the orifices and dissolve phlegm that clouds the mind, and it is used for mental clouding, forgetfulness, and cold dizziness.

The aromatic, acrid quality is the key to this herb: in Chinese medicine, fragrance opens and disperses, while warmth transforms dampness. When dampness and phlegm accumulate and turbid yin-character dampness rises to veil the heart and the clear orifices, the traditional presentation is a foggy, muddled head, heaviness, dulled consciousness or reduced alertness, poor concentration, forgetfulness, and a greasy tongue coating. Shi Chang Pu is the classical aromatic herb for opening the orifices in this damp-phlegm type of clouding, as distinct from the collapse patterns treated by stronger resuscitating substances. Through the Stomach it also transforms damp turbidity that causes a blocked, heavy abdomen, nausea, reduced taste, and thick greasy coating. It is traditionally associated with calming, and used for forgetfulness, insomnia with excessive dreaming, and tinnitus and deafness judged to involve obstructed qi, while its warmth makes it the orifice-opener for cold-damp rather than heat presentations.

Traditional Use and Common Combinations

Shi Chang Pu is prescribed within formulas matched to the turbidity. For damp-phlegm clouding with muddled consciousness after febrile illness, it is classically paired with Yu Jin, and with Zhi Shi and Zhu Ru when phlegm-heat is handled by cooling partners. For dampness blocking the middle with a greasy tongue and poor appetite, it is combined with Huo Xiang, Pei Lan, and Cang Zhu. For forgetfulness, poor concentration, and uneasy sleep it is traditionally paired with Yuan Zhi, Fu Shen, and Long Chi, and it appears in classical intelligence-and-memory formulas with Ren Shen and Fu Ling. For blocked-ear tinnitus it may be used with Ci Shi. These are traditional pattern uses; sudden confusion, fainting, weakness on one side, or severe dizziness requires urgent medical assessment.

Safety, Contraindications, and Interactions

Shi Chang Pu is contraindicated in bleeding and in heat conditions. Its warm, acrid, dispersing character makes it unsuitable for yin-deficiency heat with a dry red tongue, night sweats, or coughing of blood, and for active bleeding, because its movement is understood to encourage what should be held. It should not be used for fainting or clouding from a hot, closed pattern without appropriate cooling herbs chosen by a practitioner. Pregnancy, breastfeeding, childhood, chronic illness, or regular prescription medication should be discussed with a qualified practitioner, and use should stop and advice sought if bleeding, dryness, agitation, or an allergic reaction appears.

How TCM Practitioners Use It Today

Practitioners most often use Shi Chang Pu in a decoction, with a standard dosage of 3-9 grams, and it is also available in granules, pills, and aromatic powders. Because its action depends on volatile oils, it is commonly added later in the decoction to avoid long cooking, and fresh rhizome is occasionally used for its stronger aroma. A practitioner distinguishes genuine medicinal Acori Tatarinowii Rhizoma from other acorus sources and sets the form and dose from the pattern rather than the symptom alone.

This content is for educational purposes only and does not substitute for medical advice, diagnosis, or treatment from a licensed clinician.

Frequently asked questions

Is Shi Chang Pu safe during pregnancy? Pregnant or breastfeeding women should not use Shi Chang Pu on their own. It is warm, acrid, and moving and is contraindicated in bleeding and heat conditions, so it should be considered only when a qualified practitioner who knows the pregnancy confirms a damp-phlegm pattern.

Can Shi Chang Pu replace prescription medication? No. Shi Chang Pu is a traditional aromatic orifice-opening herb used in individualized formulas; it cannot replace prescribed treatment for memory disorders, hearing problems, or any neurological illness. Sudden confusion, fainting, one-sided weakness, or severe dizziness requires emergency assessment, and medication should not be stopped without clinician advice.

What is the difference between Shi Chang Pu and Yuan Zhi? Both are used for forgetfulness, palpitations, and uneasy sleep and are frequently paired, but they work differently. Shi Chang Pu is warm and aromatic: it opens the orifices by transforming damp-phlegm that clouds the mind, so it suits clouding with a greasy tongue and heavy digestion. Yuan Zhi, polygala root, is bitter and warm and enters the Heart and Kidney; it calms the spirit, expels phlegm, and reconnects heart and kidney, so it is preferred for anxiety, dream-disturbed sleep, and emotional withdrawal linked to heart-kidney disharmony.