Hi--Does anyone know if Levaquin or Zithromax are stronger. I asked a nurse and she said that Levaquin was stronger than Zithromax. I have chronic bacterial vaginosis. I guess that's what you would call it. I always get group-B strep. One time the doctor treated me with Zithromax and the infection went away for a long time. This time when the nurse told me I would be taking Levaquin I asked her if we could ask the doctor if I could take Zithromax. She said that Levaquin was stronger. I am thankful for this website because it gives me answers to my questions. I am aggrivated that I can't get these answers from my doctors and nurses.