I have been fighting a infection in my toncil for two months. the doctor put me on zithromax twice with no results. I finally went to a specialist who put me on ten days of Levaquin. Wow ! This is the first time in months i did not have a sore throat. My toncilitis cleared up. Thank god because my doctor said my toncils had to come out if i didn't get better. I experienced no sleep problems or stomach disorders. The only problem i think i am having is a small yeast infection. I will make an appointment with my Obgyn soon. Some meds work better than others. It all depends on whats right for you!!!!!!!!!!