I'll have to go ahead and disagree with most people on this thread. Most of the supplements which contained ephedra alkaloids had an active ingredient of the Ma huang herb. I preferred this method of consumption because it seemed to have much more of a timed release effect. Now when I take Ephedrine Hcl, it is the pure chemical in the tablet form and it all goes right into your bloodstream. I feel much more adrenal burnout from it afterwards. You can buy Ephedrine Hcl online in Vasopro or Bronc-eze. They are also available in some mini-mart type stores.