I am on biaxin for an ear infection. Within the first day of taking it I have the constant sensation of having to urinate. It is also coupled with the feeling that I can't control my bladder. It is awful. I missed a dosage one day, and the sensation went away. I am now on day 4 of 10. I don't know how much longer I can take it. I may discontinue use and hope the ear infection doesn't come back. If it does, I'll definitely opt for another antibiotic!