Medications for overactive bladder are used to treat frequent urination, urgency, and urge incontinence. They work by relaxing the bladder muscles or by blocking certain signals to reduce bladder contractions. Common classes include anticholinergics and beta-3 adrenergic agonists. Anticholinergics like oxybutynin (Oxytrol) and tolterodine (Detrol) are usually taken as oral pills, but some forms can be applied as a patch or gel. Beta-3 adrenergic agonists, such as mirabegron (Myrbetriq), are typically taken as oral pills.