It's funny how I'm so worried about food that could be expired/have gone bad, yet I just took an Allegra with an 11/20 expiration date. But I think it's also having read an article that medications/vitamins are generally OK for a fairly long time after their expiration date, just may be a bit less potent (which could be a risk if it's something life-saving, of course--though I've read that epi-pens tend to be good for a very long time). But my sinuses and eyes have been driving me crazy since we had a really warm day a couple days ago. So, I'll risk it. And get a fresh bottle soon.