I have just finished ten not say great days of combined Flagyl and Cipro. Never had medication make me feel so good and bad at the same time. This is the day after and I still have a little of the metallic taste in my mouth but the nausea is gone... yay! First three days were the worst but haven't felt like myself for ten. But now the day after completing I have horrible heartburn. I've kept myself on a low fiber low residue diet so can't figure out why I have heartburn.