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Ephedrine-type alkaloid content of nutritional supplements containing Ephedra sinica (Ma-huang) as determined by high performance liquid chromatography.
Tissues from the Ephedra sinica plant, like ginkgo, contain at least five purported active ingredients, which are in the chemical family named alkaloids.
During visits with pregnant patients, physicians also should be on the lookout for the use of goldenseal (Hydrastis canadensis) and ephedra (Ephedra sinica, ma huang, ephedrine, and Chinese joint fir), he added.