I have some Metronidazole for a yeast infection that I never finished from about a month ago. I now have a uti, and thought that medication would help. I took one this morning with water, and about an hour ago, I took the second one with CranGrape juice. I then threw up all of the juice, and it tasted like the metronidazole. I was wondering what this meant. If it was just a side affect, or a bad mixture.