Key takeaways
Myrbetriq (mirabegron) and oxybutynin ER (Ditropan XL) are both used to treat overactive bladder (OAB), but they work in different ways and have different side effects. Myrbetriq is a beta-3 adrenergic agonist that helps your bladder relax to hold more urine, while oxybutynin is an anticholinergic that reduces bladder muscle spasms. Myrbetriq is taken once daily and is available only in oral form, whereas oxybutynin comes in multiple forms, including tablets, patches, and gels. Myrbetriq can cause high blood pressure and urinary tract infections, while oxybutynin commonly causes dry mouth, dizziness, and constipation. Oxybutynin might not be the best choice for older adults due to its higher risk of side effects like drowsiness and confusion. Additionally, Myrbetriq does not have a generic version available, but oxybutynin does.
