i have been on x3 since 2-7-06 and right now i feel terrible. i take 2caps at 8am and 1cap at 5pm. i havent slept in 3 days. my heart is racing like crazy usually at 4am about 100beats a minute. i have no energy, i am tired and i yawn all day long yet i cant fall asleep. i have problems breathing, i feel like a 200lbs man is sitting on my chast. on top of that i got diarrhea. i havent lost anything except sleep. this is worthless and i wouldnt recommend it. this pill made mi sick!!!!