I know that a lot of the fast is really about starving your body of anything so that it can clean you out, etc. but sometimes, we have to take a step out.
I have had migraines, and I hear you. Don't sweat it. For weight loss purposes, an excedrin is not going to change much except allow you some peace. Hopefully with more time, the cause of the migraines will leave your body and you won't need the medicine. I pray this for you.