question: Hello doctor, I began having frequent urination, and sometimes urinating every half an hour. I consulted my doctor and UTI was ruled out. I consulted a urologist and she did an abdominal and pelvic CT scan and no structural abnormalities were found. No cystoscopy was performed. She diagnosed me as having an overactive bladder and gave me Trospium and I am taking Estrace and Clonazepam along with that. I have some relief since taking Trospium, but I have been having urethral discomfort. Is this possibly because of the Trospium? Would the CT scan have shown any problems with the urethra? I did a urine culture and blood test also.