If I remember right the Ephedra colloids standardized out to 23-25g Ephedrine HCL. pick up some no-doz or vivarin to equal out to the 200mg caffiene also contained.
Most of them also contained aspirin as well, studies have only proven enhanced weight loss in morbidly obese females, tho, when combined with Ephedrine and caffiene. For cites, google "Will Brink" ECA stack