taurine helps with clen cramps. i take 1g with each clen dose (2g ptotal ed) and i have no cramps. without it i would get cramps in unusual places such as my feet.
clen depletes taurine levels in thew liver which stops the conversion of T4 to T3.
u r experiencing the crash from the caffeine. other than taking some more i dont see how u can avoid it.