The phenetermine will make you jittery, cause sleeplessness etc., especially during
the 1st 2 weeks of use. I think
the energy drinks are not so good, either,
and the diet red bull just tastes awful. You shouldn't need it with the phen. If you are taking phen and a water pill, you will need to replace your electrolytes with potassium. If you do not get potassium or forget to take it, it can make you tired.
Good luck.
V.