On the face legally I'm sure they could evict you for smoking of anything in your rental. But this medicine not smoke so you would have a viable legal arguement in a STATE court that you were just administering your medicine and the landlord is violating your legal right to do so. But as always its going to end up in court, costs thousands and be a real pain in the ass.
I would take a differnt route. If evicted file a civil case that your medical rights were violated and you seek financial recourse. It will be easier to find an attorney who will work on commision and an attorney who is working on a commission works like a pitbull. This would accomplish 2 things. You and the attorney would make some bucks and it would start to scare the shit out of any landlords that are doing this. As always, money talks.