Flagyl is horrible!! Not only the dizziness, horrible taste, and nausea...I could not concentrate on reading anything. Even a recipe, I would read it, try to do step one and have to reread it because I could not remember what I had just read. Hate it, that and prednisone! As sr5599 said, my GI switched my to Cipro, I still felt slightly nauseaous but nothing like when I was on the Flagyl. How this helps.