Doxazosin
"I originally began doxazosin 4mg for blood pressure many years ago. Over the years I needed additional medicines for blood pressure but continued taking doxazosin 4mg twice a day. I had been told that it would be helpful in maintaining urine flow. Not long ago I began taking Proscar.

I thought that the Cardura would no longer be needed so I stopped. Within 2-3 days there was a definite reduction in urine flow. I repeated the off, then on again routine 3 times with the same rather dramatic results. I will continue with the doxazosin. 
PS: I have never noticed side effects at all."