Ephedra alkaloid content varied considerably among products. Total alkaloid content ranged from 0.0 to 18.5 mg per dosage unit. Ranges for (-)-ephedrine and (+)-pseu-doephedrine were 1.1-15.3 mg ...

Ephedra seeds found in an ancient burial pit may be the earliest evidence yet for the medicinal use of plants.

Natural products that have been reported to interact with drugs in humans include coenzyme Q 10, dong quai, ephedra, Ginko biloba, ginseng, glucosamine sulfate, ipriflavone, melatonin, and St.