Coming from one such bank, and a background of drug tests... No, major banks don't all drug test. And in general you are given some warning about drug tests (a

Coming from one such bank, and a background of drug tests... No, major banks don't all drug test. And in general you are given some warning about drug tests (at least at the several companies I was at). All you have to do is get off drugs for a week or so, and youre fine.