thanks for answering my question bro
Come on now broly. I considered your question but I have no answer as such. Everything interacts, there's no established special life threatening interaction between the two. I could speculate that you might want to keep an eye on your hydration and electrolyte levels. Both can increase BP and heart rate so that is something to definitely keep in mind. So increased organ stress is a possibility. Some antioxidants, like the mentioned NAC, might be beneficial. Might, we don't know for sure. As far as mentally, they might increase agitation and aggression but might also do the opposite. As you know, amphetamines can actually make some people less impulsive.
Similarly I've been asked if it's ok to use GH or even steroids if you've had cancer, or if there's a lot of cancer in your family. There's no really no way to answer that, you just have to make some type of cost/benefit analysis for yourself personally. Some with cancer go so far as to cut all dairy due to supposed increase in cancer risk. Milk increases IGF-1 through several mechanisms, even the fat in it increases IGF-1. But bodybuilders want optimal IGF-1 so it's a dilemma.
What do you think of my answer?

Ask a psychiatrist and he will most likely caution against steroids as they want as few variables affecting brain chemistry. It's not even recommended to drink coffee with ADHD drugs. But then some psychiatrists may add another stimulant from another class of drugs (like Wellbutrin) on top of the amphetamine/methylphenidate. So it all depends but they don't want you to experiment by yourself.