I recently tried the Ephedrea Free Xenadrine and had a very bad reaction. I ended up breaking out in a cold sweat and jitters and even felt bad enough the next day to go to the doctor. I seriously thought I was having a heart attack. I did take the recommended dosage BUT I am a little sensitive to stimulants. Please, just use caution when taking this product. Even though it's ephedra free doesn't mean you still won't have a reaction -- to my surprise!