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Ma Huang / Ephedra, aerial part of plant
Ma Huang
Taste: Acrid, Slightly Bitter • Temperature: Warm • Category: Exterior Releasing - Warm • Sub Category:

Dosage

3-9g

Actions

1. Releases the exterior & disperses cold: for patterns of wind-cold exterior excess (greater yang stage of the six stages) with chills, fever, headache, absence of sweating, & a tight, floating pulse. This herb is very effective in opening the pores & interstices to release exterior disorders.

2. Facilitates the movement of Lung qi & controls wheezing: for cough & wheezing due to obstruction of Lung qi by wind & cold. The herb both encourages the Lung qi to flow more easily, & causes it to descend. It is important for either externally contracted or internally generated wheezing.

3. Promotes urination & reduces edema: especially for edema that accompanies an exterior pathogenic influence.

Meridians

Lung, Bladder

Cautions

If too much of this herb is used, or for too long a period of time, it may cause heavy sweating that weakens the body. Toasting honey reduces this dispersing property. Use of the herb may also raise blood pressure or cause restlessness & tremors. Use with caution in cases of deficiency with sweating or wheezing. Toxicity: Three cases of ephedrine toxicity were reported after ingestion of as little as 15ml of a 1% solution. Symptoms included diaphoresis, temperature elevation (up to 39.2 c), epigastric pain, nausea, vomiting. Atropine was used successfully as an antidote. Especially in conjunction with cardiac glycosides, ephedrine can cause cardiac arrhythmias.