i found that in two cases where death was directly correlated with the use of ephendrine based products that these people had used the compound for over a year without stopping. no wonder there was such bad side effects. And in all the research i did i could not find any information on why it was ok to use Ephedrine in broncial products( with a dose of 2 times what normal ECA stacks contain, for ex. primatene says to take no more that 12 tablets a day which would be 150 mgs of ephedrine hcl a day!) but not in dietary supps. The only thing that i found is that it may be dangerous when consumed with other compounds (eg. caffiene etc)