In small doses (24MG a day), ephedrine doesn't seem to have any significant side effects. However, when used right, it has many positive benifits, especially for dieters, and bodybuilders.
It has been banned by FDA though is still easy to find in many Dieting formulas such as Xenadrine, Hydroxycut, T3 and many others.
Best benifits are showed when combined with Caffeine.