It has been known to be hard on the liver and also cause un expected death do to arrhythmias or cardiac arrest. Weight gain has always been a big problem with any Antipsychotics/neuroleptics and is prob do to there effects on dopamine, and then of course effecting the cns..
I have known many people to take drugs like this together though I do not advocate it at all. The fact that you are on a drug like this means you have nero pathway problems (or at least indicates this) Like it or not all steroids effect the nero pathways and transmission in the brain in some way or another. Both differently when on and then again once you come off.
This can effect the way think,feel, and act. Anything can happen. Again I have seen many people take things like this together and they are fine. But I am no doctor do not try to act like one and I do not think its the best Idea in the world.