I Am Taking Cap. Rapilif 4, Form Last 5 Months,

I am taking Cap. Rapilif 4, form last 5 months, my doctor asked me that you have to take this medicine life long one cap. every day before going to sleep. My uroendoscopy found normal, no infection in urine, but 1.5 year back I feel some pain in urine bladder, on advice of doctor I was taken cpourse of antibiotics for 14 days. I can'nt stop urine for long time.What are the side effects of this medicine for taking long time.