I just felt like hell overall. I got headaches, nose bleeds, tightness in my chest, couldn't breath well, cotton mouth, sleeplessness, erection issues, prostate issues (had problems taking a piss), ZERO appetite (this can be good, to a point, but not to this extreme) and NONE of these issues were present before taking it (or now, for that matter).
I took it for about a week, and then threw the remainder in the trash.
I've taken many other products like this, and have felt great AND had good results, so I know it's not just me having issues with stims.
I've gone through 3 bottles of Leviathan Reloaded and felt fine. Currently I'm using Recreate (just started Monday) and feel great on it as well.