What should I do if I am falsely accused of smoking weed?

Anonymous
At my job recently, a list of so called "users" came out and I was on that list. I haven't done any drugs, but my name is on that list. Should I confront my boss and ask to be given a drug test, or just wait it out? I'm trying for a promotion as well, so I don't know whether I should try and clear my name or not? Also would secondhand smoke from a week and a half ago affect me if I was in the room for only five minutes?
What should I do if I am falsely accused of smoking weed?
4 Opinion