Mirabegron
"I am 35 & have suffered from an overactive bladder & urethral inflammation for 19 years, voiding close to 20x during the night, & sometimes over 50x during a flare. I was prescribed medication for I.C  for years, even though I insisted it was OAB. I took Amitriptyline that helped me sleep, but nothing that settled my bladder during the day, until I found mirabegron.  Immediately the symptoms stopped and didn't have to void for over 3 hours, absolute heaven! I feel normal! My advice, don't let anyone misdiagnose you, research your symptoms and try process of elimination until you find something that works. Make sure you read what counteracts with this med, as it could cause side effects, eg alcohol and flu tablets 4 me, that increased frequency."