To be fair, if you are a registered medical user of "other stuff" you can't work anyplace that accepts Federal dollars, which includes most hospitals and non-profits. In my state, if you are a nurse, you cannot get licensed if you use "other stuff" for example. It doesn't really matter if something is "legal" or not in a lot of arenas. Etc. There are certain employers that can't discriminate against you for that reason, but there are plenty that still do. The healthcare field is probably the worst for any nicotine or other user.
Anna