Description: Mirabegron is a beta-3 adrenergic receptor agonist, which means it helps to relax the muscles in the bladder. This can help to reduce the number of times you need to urinate, as well as the urgency and leakage associated with OAB. If you're considering mirabegron for your OAB symptoms, talk to your doctor to see if it's the right option for you. It is a medication that works by relaxing the muscles in the bladder, which in turn decreases the urge to urinate. In clinical studies, solifenacin 5 Tablet was shown to be effective in reducing urinary frequency, urgency, and incontinence episodes. Solifenacin 5 Tablet is generally well tolerated, with the most common side effects being dry mouth and constipation.