Ma HuangPosting Date: 05/20/2002
Ma huang can lower body temperature, stimulate the brain, and inhibit inflammation. In China, it is one ingredient in a common cold medicine. It also has antiviral and diuretic activity. Although it has been promoted for weight loss and to improve athletic performance, it has not been shown effective for either purpose, and adverse reactions can be serious. Dose The dose of ephedrine for an adult is 25 or 50 mg, two or three times daily. Herbal preparations are expected to deliver a slightly lower dose, equivalent to 15 to 30 mg total alkaloid, calculated as ephedrine. Frequent use of ephedrine or ma huang reduces its effectiveness as a bronchodilator. Special Precautions Ephedrine can cause uterine contractions; pregnant women should avoid ma huang. Ma huang can raise blood pressure and accelerate heart rate. Persons with elevated blood pressure or heart disease should not use this herb. Men with prostate enlargement must avoid ma huang, which can aggravate the condition. Ma huang is not appropriate for people with glaucoma or pheochromocytoma. Diabetics should not take ma huang because it complicates blood sugar control. People with Graves' disease or other hyperthyroid conditions should forgo ma-huang because it can increase metabolic rate and, after four weeks of use, alter the conversion of T4 to T3. Ma huang may depress the appetite and should not be taken by people with anorexia. People with insomnia, anxiety, or suicidal tendencies may suffer from possible psychological reactions to this herb. It may also reactivate stomach ulcers in susceptible individuals. Ma huang and ephedrine are forbidden by the International Olympic Committee. Adverse Effects Headache, insomnia, nervousness or agitation, and dizziness are all potential reactions to ma huang or to ephedrine. It can raise blood pressure and trigger heart palpitations. Related Stories |
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