The alkaloids are also effective in treating allergic skin reactions such as hives, relieve general body pain and treat low blood pressure, rheumatism and narcolepsy. Because of its stimulating effect on the nervous system, ephedra can be found in some popular weight loss and energy products. For dieters it suppresses the appetite and stimulates the thyroid gland which stimulates metabolism. Recently ma huang has been the subject of scientific research for obesity because of its thermogenic fat-burning effect on dietary intake. Ephedra can cause peripheral vasoconstriction, elevation of blood pressure and cardiac stimulation, and is often combined with other tonic herbs to help counteract these effects.
People also indicate an increase in alertness and perception.
Similar to the diet formulas, it is often combined with ingredients such as kola nut or guarana which contain caffeine. Concerns over the potency of this herb and its isolated alkaloids have prompted increased regulatory scrutiny and industry label warnings. Contraindications and possible side effects should be listed on the bottle. Contraindications include general weakness, poor digestion, high blood pressure, nervousness, sleeplessness, cardiac arrhythmia's and heart disease. It should not be used if you are pregnant or nursing.