See below: I assume you have had a renal ultrasound and your post-void urine residual measured. If these are normal try prophylaxtic antibiotics. Trimethoprim/sulfa (septra/bactrim), norfloxacin, and Nitrofurantoin (macrobid) given in low dose each night before bed are the usual antibiotics used for frequently recurrent uti's. I do not prescribe Nitrofurantoin because of its potentially serious toxicities.
Answered 11/2/2015
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