I had surgery on my nose on Friday (Deviated Septum) and I have not had a beer since. I still have 5 days left on my antibiotics. 10 days without a beer. I'm 35 and I cannot remember a time since I was a teen that I haven't had a beer. What's weird is I've been on antibiotics before and I don't remember not drinking. This time I decided to look up (Keflex) online and see what the side effects were with beer and I'm getting everything from "nothing" to "coma". I really hate the Internet sometimes.