Thanks, all.

It was a few bites of lemon, although I could eat a whole lemon. I have a lemon tree in my backyard, and its fruit is sweet (for a lemon).

I haven't had a flare up in a long time, so I thought that this one was odd. And it seemed to come right after the lemon, although it may not be related.

Also, there is no drug interaction in this case.