I'm 70 years of age and had a TURP operation 15 months ago to reduce the size of my prostate. In short, the operation didn't work properly. Urinating during the day is normal but night time is a problem – up every 2 hours and then the sphincter muscles refuse to open resulting in my having to massage my penis to stimulate a flow of urine. My urologist has prescribed Valium to relax the sphincter but this isn't working either. No-one seems able to explain why this occurs at night time and why the sphincter muscles don't work as they should. I'm told the next step is a supra pubic catheter which I am trying to avoid. Has anybody out there had a similar experience?