Yea whey protein is actually worse for you than eating a steak. I personally would not, but I am a health nut and not into all that protein and fake crap thats what a healthy diet is for. I would at least ask your doctor.
I do a protein shake every morning helps me w the morning hunger. Ask jus in case
I would ask your Dr before using whey or casein protein powder... I'm sure it wouldn't do any harm every once in a while but it'd be best to check with them first.