I used ECA while on much more DNP/d than that, so xenadrine should be fine, although DNP is no joke, read and learn as much as you can, because it can kill you. Ultimatly the descision and responsibility is yours.
For me ephedra based products help combat the lethargy and some of the cravings you might get with DNP.
If you haven't already reseached DNP, then I suggest that you do. But I think you will like running 200mg/day of DNP. I use this amount with 50mcg t3 and 3IU GH. I use ephedra occassionaly to help boost my workouts if I feel a little lazy. For some reason ephedra does not have much of a appetite suppressing effect with me. I take Adderal for ADD and that decreases my appetite well even in small dosages.