Mirabegron
"I have been on this medication ,50mg for about a 1 1/2 and it changed my life. I had tried  vesicare and one more kind and after 3 months, all of the other stopped. I give this a 100 out of 10. 

Downside, very expensive.  I pay 275.00 a month until 1200 deductable met and that's with insurance."