Ephedra Stem
Ma Huang
Pharmaceutical name: Herba Ephedrae
Properties: acrid, slightly bitter, warm
Channels Entered: Lung, Bladder
Actions & Clinical Applications:
1. Relieves exterior, disperses cold, and induces sweating
2. Circulates Lung Qi and relieves wheezing or coughing
3. Regulates water metabolism, promotes urination, and reduces edema
4. Opens nasal passages, releases the skin rashes and relieves itching
Dosage & Administration: 1.5 – 10g (over dosage can cause toxic symptoms)
Raw for inducing sweating, and stir-baked or honey-fried for asthma
Pharmacological Actions:
Major Ingredients: 0.48 2.48% (1-Ephedrine, d-pseudo ephedrine, norephedrine)
Effect on cardiovascular system: ephedrine shows a vasoconstrictive and raises blood pressure
Respiratory effect: the water extract and ephedrine ornorephedrine have dilated the branch tract and expectorant effect
Dilates pupils