Head-to-head comparisons of medication uses, side effects, warnings, and more.
Key takeaways
Myrbetriq (mirabegron) and trospium (Sanctura) 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 so it can hold more urine, and it's taken once daily. Trospium, on the other hand, is an antimuscarinic medication that blocks acetylcholine to relax the bladder muscles, and it comes in both immediate-release tablets taken twice daily and extended-release capsules taken once daily. Myrbetriq can cause high blood pressure and urinary tract infections, while trospium commonly causes dry mouth and constipation. Unlike Myrbetriq, which has no generic version, trospium is available in a generic form. Additionally, Myrbetriq can be taken with or without food, but trospium must be taken on an empty stomach. Both medications can cause serious side effects like angioedema, but trospium also has risks related to vision changes and nervous system effects.
Myrbetriq (mirabegron)
Trospium
Myrbetriq (mirabegron)
Trospium
Summary of Myrbetriq vs. Sanctura
Summary for Beta-3 adrenergic agonist
Prescription only
Myrbetriq (mirabegron) is used to help with overactive bladder (OAB) in adults. It can also treat a bladder problem called neurogenic detrusor overactivity (NDO) in children 3 years and older. It works as a beta-3 adrenergic agonist to help the bladder hold more urine. Myrbetriq (mirabegron) is taken by mouth once a day. It comes as a brand-name or generic extended-release tablet. A solution made from granules of the medication is available for children, but it's brand name only. Side effects include high blood pressure, cold symptoms, and urinary tract infections.
Summary for Antimuscarinic
Prescription only
Trospium chloride is an antimuscarinic medication that's used to treat overactive bladder in adults. It's available as an immediate-release tablet that's taken by mouth twice daily and an extended-release capsule that's taken once daily. The most common side effects are dry mouth and constipation. The brand name Sanctura has been discontinued, but generic trospium is still available.