Aconite, also known as "monkshood" or "Fu-Tzu", is an extremely powerful and potentially toxic herb with a long history of use. In traditional Chinese medicine, this herb is considered an effective stimulant for the spleen and kidneys, and is a favorite treatment for malaise, general weakness, poor circulation, cancer, and heart disease. Aconite is also occasionally used in very low doses by modern homeopathic practitioners as a treatment for colds, influenza, rheumatism and congestion.
Aconite's toxic ingredient is an extremely potent central nervous system poison called "Aconitine". Even in extremely small amounts, this potent chemical can inhibit respiration, and in larger amounts can lead to complete heart failure. Traditionally, Chinese medical practitioners will combine Aconite with other herbs before final preparation as a tea or infusions in order to neutralize its toxic effects.
Due to its extremely potent effects on the central nervous system, Aconite has also been prepared as a liniment or ointment for the treatment for neuralgia, sciatica, rheumatism, arthritis, and other pain conditions. Even in the form of a liniment for topical application, Aconitine can be extremely toxic.
Aconite is definitely not an herb for casual use by the herbal novice, and if used at all, should only be done so under the close supervision & monitoring of a knowledgeable practitioner.