BUT, it's time released, it doesn't hit you in the face like 400mg. 4-5 hours in I do get abit jumpy, but without the anxiety/"pseudo-paranoia" that SX would bring.
Actually on this 3rd day I like the Stim X focus more than SX. It's not as euphoric, which means I can DO STUFF more easily without getting distracted by "sex, drugs and rock'n-roll". And still, empty stomach 2 caps and a huge bottle of water and a can or two of diet coke you can get "in the zone".
Depending on your tolerance, 1 cap may be PLENTY.
Also, I don't plan to take it every day, I always "cycle" my stims, fwiw. (I rotate it with SX..... nah, just kiddin lol)