trex makes me feel like a MADMAN on 1 a day... my heart is beating hard enough to feel for 8 hrs after i take ONE PILL... i've never tried taking more than that. Ps I have a high caffeine tolerance usually, so it must be the other stims. Weight is about 186 right now at 5'10... bf is single dig. I'm thinknig of upping my trex and seeing if this is a mental thing, I do have some anxiety even when taking nothing but... this is a whole new level.