It's ephedrine. It's also used as an EC stack (you gradually mix 20-25mg of ephedrine with 200mg of caffeine 3 times a day). I tried and still use it on a cut, works quite well, especially in the first couple of days where you literally loose your appetite. The stack is pretty cheap too and easily obtainable (seperatly). Watch out though, if you have an heart condition or having heavy side effects, you should back off and either stop or reduce the dosage. Listen to your body. Otherwise, take it in intervalls of 4-6 hours and not much later than 5-6 hours before your sleeping time as you may have difficulties going to sleep. There's also an ECA stack which also mix aspirine with epheredine and caffeine but I never tried and would probably won't. Anyone heard of the HEAT stack from Avant's lab or something? heard it was the ''new EC stack''. Yeah, I don't really need to cut weight and I have a heart murmur so I'm not gonna take that.