Just another point of view here - but just because Mike has painkillers doesn't mean he is an addict. Although the fact that they are not in a prescription bottle is disconcerting. If he injured his shoulder as he stated, and could not take time off, it is very likely indeed that the physician would prescribe painkillers to help him out. He did not have massive quantities from what I could tell. It seems to me that Susan went waaay overboard on this one. But I guess that was the storyline - they just could have written it better if they want us to believe he really has a problem.