Wu Gong

What is Wu Gong?

Wu Gong is the dried body of a centipede. It is a single drug used in Chinese herbal medicine, not a blend. Its other name in English is simply "centipede".

In Chinese medicine it is used for fits (seizures), stiff muscles and spasms. Old texts also used it for lockjaw (tetanus), snake bite, lumps in the neck and head pain that will not go away. It is almost always given inside a formula with other herbs, by a trained herbalist.

Wu Gong is a toxic herb. Human trial proof is very thin, and we found no trials that test it on its own in people. Long use in a tradition is not proof that a herb works, and this one can cause real harm.

How does Wu Gong work?

No one has shown in people how Wu Gong works. Lab and animal work is all we have, and that work does not prove anything about you.

Centipede venom holds proteins and peptides (small bits of protein) that act on nerves. In lab tests, some of these slow or block nerve signals. This is the loose idea behind its old use for spasms and fits.

Lab studies also show that some parts of it can break open red blood cells and can harm liver and kidney cells at high doses. So the same chemistry that draws interest is also part of why it is risky.

What forms does Wu Gong come in?

Wu Gong is sold in these forms: - Whole dried centipedes, often on a thin split of bamboo. - Ground powder, usually put into capsules or pills. - Part of a mixed herbal formula made up by a herbalist.

Some folk practice soaks it in wine or oil for use on the skin.

It is normally toasted or baked first. The head and legs may be removed. In China it is treated as a toxic herb, meant to be handled by trained people only.

Where it comes from:

Wu Gong has been used in Chinese medicine for about two thousand years. It appears in early Han-era drug texts and stayed in use through later herbals such as the Ben Cao Gang Mu of the 1500s.

It was classed as a "wind-calming" drug, used for shaking, spasms and lockjaw. It was also a toxin used to "fight toxin", such as in snake bite and stubborn sores.

Its standing in Chinese medicine is long and steady. It has never been a gentle daily tonic.

What does Wu Gong help with?

• Fits (seizures) and childhood convulsions: This is the best known old use. Wu Gong was given in formulas to calm shaking and stiff limbs. We found no human trial that tests it for this. Never use it in place of seizure drugs your doctor has given you.
• Lockjaw (tetanus): Old texts pair Wu Gong with other herbs for lockjaw, a serious illness that stiffens the jaw and body. There is no modern trial support. Tetanus needs emergency hospital care, not herbs.
• Muscle spasms and twitching: Herbalists use it for spasms that do not settle with milder herbs. The support is tradition and small lab studies on nerve signals. No human trials were found.
• Facial palsy (a drooping, weak face): Wu Gong appears in Chinese formulas for a weak, drooping face. Reports are case notes and old texts, not controlled trials. A sudden drooping face needs same-day medical care, since it can be a stroke.
• Long-lasting head pain: It was used for head pain that other herbs did not touch. Evidence is traditional only. Bad or new head pain should be checked by a doctor.
• Snake bite (folk first aid): Folk practice used crushed centipede on bites and in drinks. This is historical use only and is not safe advice. Snake bite is an emergency; call for help and get antivenom.
• Scrofula (swollen, lumpy neck glands): Old texts used Wu Gong for hard neck lumps, often in mixed formulas or on the skin. There is no trial evidence. New or growing lumps need a doctor's check.
• Boils, sores and skin lumps: Wu Gong soaked in oil or wine was dabbed on sores. Support is traditional. Lab work on its venom is early and does not show that it helps skin problems in people.

What are the side effects of Wu Gong?

• Nausea, vomiting and belly pain
• Dry mouth and thirst
• Dizziness or a spinning feeling
• Drowsiness
• Rash, hives and itching
• Anaphylaxis (a sudden, severe allergic reaction with swelling and trouble breathing)
• Red-brown urine from red blood cells breaking apart
• Liver injury (yellow skin or eyes, dark urine, pain under the right ribs)
• Kidney injury (much less urine, puffy legs)
• Fits (seizures) at high doses
• Slowed breathing and death in cases of overdose

Good to know:

Mild stomach upset and itch are the most common problems. The serious ones are rare but real, and they have been reported.

China lists Wu Gong as a toxic drug for good reason. Poisoning cases and deaths have been recorded after large doses.

Allergy is a special worry. If you react to insects, shellfish or bee stings, you may react hard to this.

Options to discuss with a clinician

If Wu Gong appeals to you for spasms, pain or stubborn skin sores, there are gentler options worth asking about. Chinese herbal practice uses milder herbs such as Bai Shao (white peony) for cramping, Gou Teng for twitching and tremor, and Dan Shen for sluggish circulation. Outside of herbs, warmth, gentle stretching and simple pain relief from a pharmacy may also be worth raising.

Take these names to a clinician or a registered herbalist and ask what suits your case. A doctor can also check that your symptoms are not from a problem that needs tests or urgent care. None of this is a prescription; it is a starting point for that conversation.

Graded pages for the options named above:

• Stretching — evidence grade A, traditional tier T3