Qian Zheng San
Do not self-treat with Qian Zheng San
Practitioner-prepared only. Bai Fu Zi is a root tuber that burns the mouth and throat unless it has been correctly processed.
If this is an emergency
Some reactions to Qian Zheng San need urgent care. Call your local emergency number or go to an emergency department straight away — do not wait to see whether it passes.
Who should avoid Qian Zheng San?
- Do not use if you are pregnant or trying to become pregnant. This is an absolute ban: scorpion and Bai Fu Zi can harm a developing baby.
- Do not use if you are breastfeeding.
- Do not use if you are considering it for a child, unless a qualified doctor of Chinese medicine has prescribed it and is checking the child.
- Do not use if you take warfarin or any other blood thinner.
- Do not use if you have a bleeding disorder, or if you have surgery or dental work booked in the next two weeks.
- Do not use if you have liver disease or kidney disease.
- Do not use if you have an arrhythmia (an uneven or racing heartbeat), or if you take drugs for your heart rhythm.
- Do not use if you have epilepsy (a condition that causes seizures) or take seizure medicine.
- Do not use if you have myasthenia gravis (a disease that makes muscles weak) or take a muscle relaxant.
- Do not use if you are allergic to shellfish, insects, silk or scorpion.
- Do not use if you cannot confirm that the Bai Fu Zi in it has been properly processed to cut its toxicity.
- Do not use if the product has no full ingredient list, or if you bought it online from an unknown seller.
- Do not use if you are drinking alcohol, and do not take it with wine as the old recipe suggests.
- Do not use if you are treating yourself. This formula needs a trained practitioner to set and watch the dose.
When should you see a doctor?
A face that suddenly droops on one side can be a stroke. Call emergency services straight away if the droop comes with slurred speech, a weak arm, confusion or a bad headache.
Even without those signs, see a doctor the same day. Bell's palsy is usually treated with steroid tablets, and those work best when started within about three days.
Stop the formula and get medical help now if you get chest pain, a racing or uneven heartbeat, trouble breathing, spreading numbness, muscle weakness, fainting, or a rash with swollen lips or tongue.
Also call a doctor if your mouth or throat burns strongly, if you vomit repeatedly, or if your face has not begun to improve after two weeks.
- What it is: A classical Chinese herbal powder of three items, used since the Song dynasty for a face that suddenly droops to one side.
- Active ingredients: Bai Fu Zi (processed Typhonium giganteum tuber), Jiang Can (stiff silkworm), Quan Xie (scorpion, which holds nerve toxins)
- Side effects: Mouth burning and stomach upset are common; allergy, heart rhythm changes and breathing trouble are rare but serious.
- Pregnancy & breastfeeding: Avoid in pregnancy and while breastfeeding.
Educational information, not medical advice — ask your doctor or midwife.
What is Qian Zheng San?
Qian Zheng San, also called Lead to Symmetry Powder, is a classical Chinese herbal formula. Traditional healers gave it for a face that suddenly droops or pulls to one side. Old texts describe this as a "deviated mouth and eye".
It is listed here as a single drug (TCM formula). The classic recipe holds three items: Bai Fu Zi, Jiang Can (stiff silkworm) and Quan Xie (whole scorpion). Two of those three are treated as toxic within Chinese medicine itself.
Here is the short verdict. Its place in Chinese medicine is long and settled, but good human trial evidence is thin. Long traditional use is not proof that a remedy works, and this one carries a real risk of harm.
This is not a self-care formula. It belongs only in the hands of a trained practitioner who knows the dose, the processing and the dangers.
How does Qian Zheng San work?
Nobody has shown how it works in people. In Chinese medicine terms, it is said to "dispel wind and transform phlegm" and to open the channels of the face.
Lab work offers hints only. Scorpion holds peptides (small protein pieces) that act on sodium channels, the tiny gates that let nerve cells fire. Silkworm and Bai Fu Zi extracts have eased swelling in animal tests.
None of that has been linked to a real benefit for facial palsy (weakness of the face muscles) in a solid human trial. Treat the mechanism as a theory, not a fact.
What forms does Qian Zheng San come in?
You will meet it as a fine powder, as small pills, as ready-made granules you stir into hot water, or as a decoction (herbs simmered into a tea). The classic method was a powder taken with warm rice wine.
Some modern products swap Bai Fu Zi for a milder herb, or leave out the scorpion. Others add herbs. Always read the full ingredient list before you consider it.
Where it comes from:
It comes from Yang Family's Treasured Formulas (Yang Shi Jia Cang Fang), a Chinese text of about 1178, during the Song dynasty.
Since then it has stayed a named, taught formula for facial droop in Chinese medicine schools and clinics. That gives it a strong standing in one tradition, not across many.
What does Qian Zheng San help with?
- Sudden one-sided facial droop (Bell's palsy): This is the classic use, and the only one with any trial work behind it. Chinese-language studies usually add the formula to acupuncture and steroid drugs, so the formula's own effect cannot be separated out. A sudden facial droop can also be a stroke, so you need urgent medical checking first, not herbs.
- Facial droop left over after a stroke: Traditional texts use it here, and some clinics still do. There is no reliable trial that shows it helps recovery after a stroke. Stroke care also involves blood thinners, which this formula may clash with.
- Twitching or spasm of the face and eyelid: Traditional use only. The scorpion ingredient is classed in Chinese medicine as a herb that "stops spasm". Human evidence for this formula in facial spasm is not available.
- Trigeminal neuralgia (sharp face pain): Some practitioners use it, often changed and combined with other herbs. We found no controlled human trial for this use. Standard drug treatment for this pain is well proven, so do not swap it out.
- Migraine and one-sided headache: A minor, later traditional use. Evidence in people is absent. Safer and better-tested options exist.
What are the side effects of Qian Zheng San?
- Numbness, tingling or burning in the mouth, tongue and throat
- Nausea, vomiting or stomach pain
- Dizziness or headache
- Itchy rash, hives or swelling (an allergic reaction to scorpion or silkworm)
- Fast or uneven heartbeat
- Muscle weakness or trouble breathing, with too high a dose
- Numbness and pins and needles in the hands and feet
Good to know:
Mild mouth and stomach irritation is the most common problem, and it usually comes from Bai Fu Zi that was poorly processed.
The serious effects are rare but real. Poisoning reports for scorpion and for aconite-type herbs describe heart rhythm changes, weakness and breathing trouble. Allergy to insect and scorpion protein can be sudden and severe.
Risk rises sharply with unlabelled products, self-dosing and higher doses.
Options to discuss with a clinician
For every problem on this page there are routes that have been studied far more closely, and each one is a conversation to open with a doctor, pharmacist or qualified herbalist — not something to pick up in place of anything else.
**Sudden one-sided facial droop.** This needs urgent medical assessment the same day, because stroke and Bell's palsy look alike at the start and the treatment window is short. Once a cause is confirmed, clinicians may discuss Methylcobalamin (B12 Active Form), Photobiomodulation Therapy (treatment with specific wavelengths of light) or Moxibustion, and facial physiotherapy is standard care.
**Migraine and one-sided headache.** Magnesium, Vitamin B2 (Riboflavin), Ubiquinol/Coenzyme Q10 (CoQ10), Butterbur, Feverfew and Biofeedback (learning to steer body signals with a monitor) all have trial evidence worth raising at an appointment, alongside prescription prevention.
**Trigeminal neuralgia (sharp stabbing face pain).** This has specific drug treatments a neurologist can start. Capsaicin (topical), PEA (Palmitoylethanolamide) and Alpha Lipoic Acid are sometimes discussed as additions.
**Facial or eyelid twitching.** Ask a clinician what is driving it — fatigue, caffeine, magnesium status or a nerve problem all point different ways.
Graded pages for the options named above:
- Methylcobalamin (B12 Active Form) — evidence grade B, traditional tier T0
- Ubiquinol/Coenzyme Q10 (CoQ10) — evidence grade B, traditional tier T0
- PEA (Palmitoylethanolamide) — evidence grade B, traditional tier T0
- Photobiomodulation Therapy — evidence grade A, traditional tier T0
- Vitamin B2 (Riboflavin) — evidence grade B, traditional tier T0
- Capsaicin (topical) — evidence grade A, traditional tier T0
- Alpha Lipoic Acid — evidence grade A, traditional tier T0
- Biofeedback — evidence grade A, traditional tier T0
- Moxibustion — evidence grade B, traditional tier T3
- Butterbur — evidence grade A, traditional tier T2
- Magnesium — evidence grade A, traditional tier T0
- Caffeine — evidence grade A, traditional tier T0
- Feverfew — evidence grade B, traditional tier T2
Review status
This page has not been signed off by a pharmacist and is not published. It is shown here for a policy decision only.