Hi, I have been suffering from mild UTI since past months. Have tried norflox, and now niftran to stop the symptoms of pelvic pain, overactive bladder and a bit of back pain and bladder pain. After taking niftran 100 mg twice a day for 6 days now thr symptoms seem to have gone except the overactive bladder. Please suggest a medicine that can help this. P.s culture reports show no bacteria but the symptoms still persisted. After niftran the symptoms have gone except for the urgency to urinate (mostly at night)