I had antibiotics with a dental issue a few months ago...I drank kava still, but it was extremely gnarly on my stomach. I stopped taking them a little sooner than I was supposed to because I was so sick of the stomach issues. I normally don't notice antibiotics at all when I take them. I've had them in the past, even with alcohol, no problem. So either kava and antibiotics are a rough mix, or this particular antibiotic didn't work well with me. Not sure.
I had my wisdom teeth removed in my mid 20's...I refused to take the prescribed Vicodin and relied solely on Advil and it worked fine. The whole ordeal was a lot less worse than some people described it to me. I think it partially depends on how good the oral surgeon is.