I had a friend who I noticed took Mucinex A LOT. I’ve used it occasionally when I’ve been congested, but it seemed abnormal how often I saw him taking it. I finally asked him why he was taking it one time, because he didn’t seem sick at all, and he looked puzzled and said “well, I think I’m getting sick”.

I pressed further and he said, “because it’s an expectorant”. It turns out he thought “you take an expectorant when you are EXPECTING to get sick”.