I have been on Levaquin for 2 days. My Doctor had me take a 750 mg dose before I left his office. I am taking them due to a nasty bladder and kidney infection. I hurt more than I ever remember hurting...it is like someone used me for a punching bag and it continues to get worse, not better. I ache horribly. I cannot taste anything and I couldn't sleep more than two hours last night. I range between feeling hot and having the sweats to having the chills. If I don't feel better tomorrow, I will go to the hospital.