Prepared Aconite Lateral Root

Traditional Use

Primary Actions

• Restores devastated Yang and rescues collapse - Fu Zi is one of the central herbs for cold collapse with icy extremities, faint pulse, somnolence, or severe exhaustion of Yang.
• Warms fire and assists Heart, Spleen, and Kidney Yang - it is used for edema, watery diarrhea, abdominal cold pain, fatigue, impotence, and chronic cold weakness when deficient cold is deep and persistent.
• Warms the channels and alleviates severe cold pain - classical use includes cold-damp Bi, fixed joint pain, cold low-back pain, and painful obstruction that needs stronger warming than milder channel herbs can provide.
• Supports Heart Yang and unblocks chest Yang - Fu Zi appears in formulas for chest pain, palpitations, weak circulation, and collapse-level cold when impaired Yang transformation affects the cardiovascular system.

Secondary Actions

• Fu Zi is the category name for the processed daughter root and includes commercial forms such as salted fuzi, black slices, and white slices; proper processing changes toxicity far more than the pinyin label alone suggests.
• It is rarely used alone; classic formulas almost always pair it with ginger, licorice, ginseng, Bai Zhu, Fu Ling, or warming Kidney herbs to steer its intense heat toward rescue, water metabolism, or pain relief.

Classic Formulas

• Si Ni Tang - core Shaoyin rescue formula for devastated Yang, cold extremities, and a nearly extinguished pulse.
• Zhen Wu Tang - warms Spleen and Kidney Yang while mobilizing water for edema, dizziness, abdominal pain, and deficiency-cold fluid retention.
• Fu Zi Li Zhong Tang - middle-burner warming formula for Spleen-Yang deficiency with abdominal cold, chronic diarrhea, and weak digestion.
• You Gui Wan - deeply warming Kidney-Yang formula in which Fu Zi helps restore fire at the gate of vitality for cold infertility, weakness, and lower-body debility.

Classical References

• Shen Nong Ben Cao Jing places Fu Zi among strongly acting lower-grade medicinals, reflecting its potency for cold accumulation and pain but also its toxicity.
• Shang Han Lun and Jin Gui Yao Lue use Fu Zi centrally for Shaoyin collapse, edema, cold pain, and debility, always within carefully constructed formulas rather than casual self-use.
• Chinese Pharmacopoeia guidance continues the classical emphasis on processed lateral root only, pregnancy caution, and specific herb incompatibility traditions.