Qian Zheng San (Lead to Symmetry Powder)

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Indications

Western Uses:

• What is Qian Zheng San used for in modern practice?

  In modern practice Qian Zheng San is the best-known classical formula referenced for Bell’s palsy and other forms of acute peripheral facial nerve palsy — presentations that match its traditional picture of sudden, one-sided facial paralysis without other neurological findings. It is typically combined with acupuncture or electroacupuncture on the affected side rather than used alone, and Chinese hospital studies of “peripheral facial paralysis” commonly use it (often modified) alongside conventional care such as corticosteroids.

  This biomedical correlate is offered as a reference to the formula’s traditional use, not as a claim that it treats any diagnosed condition. Facial paralysis has several possible causes (including stroke and Ramsay Hunt syndrome), so a new facial droop always warrants prompt medical evaluation before any herbal or acupuncture treatment. See research for the modern evidence base, which remains limited and mostly small-scale.

  Source: traditional-use correlate summarized from Bensky & Barolet, Formulas & Strategies, and clinical-study framing in PMC 9478275; reference only, not a treatment claim.

Originally Appeared In:

• Collected Formulas of the Yang Family (Yang Shi Jia Zang Fang)

Notes:

• How does Qian Zheng San compare to other wind-stroke formulas, and how is it modified?

  Qian Zheng San is deliberately narrow — three herbs aimed only at wind-phlegm in the facial channels — which sets it apart from broader wind-stroke formulas built for the whole body.

  • vs Da Qin Jiao Tang: Da Qin Jiao Tang treats wind-stroke of the channels more broadly (face and limbs, with qi-and-blood-nourishing herbs added) for a more depleted constitution; Qian Zheng San is simpler and more sharply focused on the face alone.
  • vs formulas for organ-level (zàng-fǔ) stroke (e.g., Su He Xiang Wan for the cold, closed pattern): those address loss of consciousness and require an entirely different strategy; Qian Zheng San never substitutes for them.

  Common modifications: Bai Zhi, Fang Feng, and Chuan Xiong are often added to strengthen wind-dispersal and address facial pain or headache; Quan Xie is sometimes paired with Wu Gong (centipede) for a stronger wind-extinguishing effect in stubborn cases. Modern hospital protocols frequently pair a modified version (“jiawei Qian Zheng San”) with acupuncture or electroacupuncture rather than using the herbs alone.

  One classical Chinese-language source records Quan Xie at half the amount of the other two herbs (3 g vs. 6 g each for Bai Fu Zi and Jiang Can) rather than equal parts. Sacred Lotus sources & references and the main English-language references (Bensky & Barolet; multiple herb-supplier formularies) use equal amounts of all three, which is the version presented here.

  Source: Bensky & Barolet, Formulas & Strategies (comparisons, common modifications); cross-checked against Chinese-language materia medica references for the gram-amount variant.

Clinical Studies & Research:

• Is there modern research on Qian Zheng San?

  Yes, though the evidence base is still small — one recent animal study on the mechanism of nerve recovery and a retrospective clinical study combining it with electroacupuncture. In a 2025 mouse study of surgically crushed facial nerve, Qianzheng powder improved facial motor-function recovery and was linked to activation of the BDNF/TrkB/CREB signaling pathway, a pathway associated with nerve regeneration, with a favorable safety profile in the model. A separate retrospective study of 90 hospital patients with peripheral facial paralysis found that adding electroacupuncture plus Qianzhengsan decoction to standard care (prednisone and mecobalamin) improved the overall response rate and facial-nerve function versus standard care alone.

  • Mechanism (preclinical, mouse): Qianzheng powder promoted facial nerve regeneration via BDNF/TrkB/CREB pathway activation after nerve-crush injury (PMID 41438125).
  • Clinical (retrospective, n=90): electroacupuncture combined with Qianzhengsan decoction improved response rate and facial nerve function in peripheral facial paralysis versus medication alone (PMC 9478275).

  Sources: PubMed 41438125; PMC 9478275. Research context, not a therapeutic claim; direct high-quality clinical trial evidence for the formula remains limited.