Fù Zǐ (附子) — Prepared Aconite root / Processed Monkshood

Fu Zi (Fù Zǐ, prepared Aconitum carmichaelii) is one of the most powerful warming and yang-tonifying herbs in Chinese herbal medicine. Hot, acrid and toxic in its raw form, it must be carefully processed (paozhi) before use. It rescues collapsed Yang, warms the Kidney, Spleen and Heart, dispels cold and relieves pain. Used in classical formulas such as Si Ni Tang and You Gui Wan for severe cold patterns, chronic fatigue with cold extremities, and kidney yang deficiency. Only prescribed by qualified TCM practitioners due to its narrow therapeutic margin.

On this page

1. Overview
2. Properties
3. Actions and indications
4. Key formulas
5. Modern research
6. Incompatibilities
7. Cautions and contraindications
8. Treatment at my clinic

1. Overview

Fù Zǐ (附子) — Aconitum carmichaelii (processed) — is known in English as Prepared Aconite root / Processed Monkshood. It belongs to the category of Herbs that warm the Interior in the Chinese Materia Medica and is used in Chinese herbal medicine as a component of classical herbal formulas and tailored prescriptions.

I prescribe Fù Zǐ as part of bespoke herbal formulas from pharmaceutical-grade granules sourced from Sun Ten in Taiwan. Herbs are always combined with other herbs selected to match the patient’s individual TCM pattern. Online consultations are available for patients who cannot attend my clinic in person.

2. Properties

3. Actions and indications

Principal actions

1. Rescues devastated Yang and prevents collapse — the most powerful Yang-rescuing herb in Chinese medicine
2. Tonifies the fire of the Ming Men — the root Yang of the body
3. Disperses Cold and relieves pain throughout all channels
4. Warms the Spleen and Kidney Yang and stops diarrhoea

Indications

1. Yang collapse — cold extremities, profuse sweating, faint pulse and shock
2. Kidney Yang deficiency — impotence, infertility, lower back pain and cold limbs
3. Spleen and Kidney Yang deficiency — chronic diarrhoea and oedema
4. Cold painful obstruction Bi syndrome — arthritis and joint pain from Cold
5. Heart Yang deficiency — palpitations, chest pain and breathlessness from Cold

4. Key formulas containing Fù Zǐ

Fù Zǐ appears in the following key formulas:

• You Gui Wan
• Jin Gui Shen Qi Wan

See the full Chinese herbal medicine formula directory for detailed information on all 88 classical formulas.

5. Modern research

Processed Aconite (Fu Zi) is the most powerful Yang-warming herb in the Chinese Materia Medica and requires careful processing to reduce toxicity. It is the processed lateral root of Aconitum carmichaelii. Processing converts highly toxic aconitine to less toxic benzoylaconine and aconine. Key bioactive constituents include alkaloids (aconitine, mesaconitine, hypaconitine, benzoylaconine). Research confirms significant cardiotonic effects (positive inotrope), vasodilatory action, anti-inflammatory effects, anti-arrhythmic properties at therapeutic doses, and powerful analgesic effects. Fu Zi combined with Gan Jiang (Si Ni Tang) is the most important emergency Yang-rescue formula. Combined with Rou Gui and other Yang tonics (You Gui Wan), it forms the most powerful Kidney Yang tonification combination.

6. Incompatibilities

The classical Ming-dynasty texts Shi Ba Fan (Eighteen Antagonisms) and Shi Jiu Wei (Nineteen Mutual Inhibitions) record herb pairs that should not be combined. Modern practitioners treat these as strong cautions rather than absolute contraindications — classical training avoids the combinations except in carefully supervised low-dose protocols.

Fù Zǐ (附子) Prepared Aconite root / Processed Monkshood should not normally be combined with:

• Ban Xia — per the Shi Ba Fan
• Gua Lou — per the Shi Ba Fan
• Tian Hua Fen — per the Shi Ba Fan
• Chuan Bei Mu — per the Shi Ba Fan
• Zhe Bei Mu — per the Shi Ba Fan
• Bai Lian — per the Shi Ba Fan
• Bai Ji — per the Shi Ba Fan

7. Cautions and contraindications

MUST be properly processed before use — raw aconite is highly toxic and potentially fatal. Only use from pharmaceutical-grade processed sources (Zhi Fu Zi). Must be decocted for at least 60 minutes in raw herb decoctions to ensure detoxification. Contraindicated in pregnancy, Yin deficiency with Heat, and all excess Heat patterns. Not compatible with Ban Xia, Bai Ji, Bei Mu, Bai Lian or Bai Fu Zi (classical incompatibilities). Should only be prescribed by an experienced, registered herbalist.

Pattern contraindications

Contraindicated in Heat patterns, Yin deficiency with Empty Heat, hypertension with Liver Yang rising and during the acute phase of febrile illness. Pregnancy: most warming interior herbs are contraindicated except under expert prescription for specific cold patterns.

Modern drug interactions

Significant interactions: Fu Zi contains aconitine-class alkaloids which are cardiotoxic in raw or under-processed form — only ever used as the prepared (paozhi) form. Can potentiate cardiac glycosides (digoxin) with risk of arrhythmia, and interact with antihypertensives and antiarrhythmics. Only prescribed by practitioners trained in toxic-herb safety. Pregnancy: contraindicated.

Important: Chinese herbs should always be prescribed by a fully qualified herbalist who is a member of the Register of Chinese Herbal Medicine (RCHM). Never self-prescribe Chinese herbs without professional guidance. Dr (TCM) Attilio D’Alberto is a member of the RCHM with over 25 years of clinical experience.

8. Treatment at my clinic

I prescribe Fù Zǐ as part of tailored herbal formulas for a range of conditions including Fertility, Male infertility, Chronic fatigue syndrome, Menopausal symptoms. Every prescription is individually formulated following a full TCM assessment and adjusted throughout treatment as the pattern responds.

I see patients in person at my clinic in Wokingham, Berkshire. Online Chinese herbal medicine consultations are available throughout the UK and internationally. Visit the prices page for consultation fees.

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Prefer to be treated from home? Chinese herbal medicine online consultations are available throughout the UK and worldwide. After a full video consultation, Dr (TCM) Attilio D'Alberto formulates a bespoke herbal prescription and posts your Chinese herbs directly to your door.