Hola!
Yes, you can definitely stack the two. SX, or Slim Xtreme, is a new product that will be released soon. It is a remake of the original StimX, what you have, and also contains ADBE. The additional ADBE won't hurt you, but I would look for some nasty side effects such as a pleasant mood, increased focus, and decreased appetite - you know, those nasty things that an overweight ogre with ADD might not want.

:lol:
You're all good, man! Enjoy it!