Drug Class Guide
Overactive Bladder Medications
Two families of pills that calm sudden urges, frequent trips to the bathroom and urge leakage, best used alongside bladder training.
How Overactive Bladder Medications Work
In overactive bladder, the muscle in the bladder wall squeezes before the bladder is full, causing sudden urges. Antimuscarinics block the acetylcholine signals that trigger those contractions. Beta-3 agonists work differently, relaxing the bladder muscle so it can hold more urine. Both reduce urgency and leaks gradually over several weeks.
What Overactive Bladder Medications Treat
- Overactive bladder
- Urge urinary incontinence
- Frequent nighttime urination from an overactive bladder
Overactive Bladder Medications in Our Medication Guide
- OxybutyninDitropanAntimuscarinic; the oldest option, as tablets, a skin patch or a gel. Immediate-release causes the most dry mouth.
- TolterodineDetrol, Detrol LAAntimuscarinic taken once daily as a long-acting capsule or twice daily as a tablet.
- SolifenacinVesicareAntimuscarinic taken once daily.
- DarifenacinEnablexAntimuscarinic taken once daily; acts mainly on the bladder's receptor subtype.
- FesoterodineToviazAntimuscarinic taken once daily; converted in the body to the same active compound as tolterodine.
- MirabegronMyrbetriqBeta-3 agonist taken once daily; can raise blood pressure.
- VibegronGemtesaBeta-3 agonist taken once daily, with few drug interactions.
Common Side Effects
Antimuscarinics commonly cause dry mouth, constipation and blurry vision, and sometimes drowsiness. In older adults they can cause confusion or memory problems. Beta-3 agonists avoid those effects; their side effects include headache, urinary tract infections and, with mirabegron, a small rise in blood pressure.
Important Cautions
- Antimuscarinics are on the American Geriatrics Society list of medicines to avoid in many older adults, and long-term use has been linked to a higher risk of dementia in observational studies.
- Tell your doctor about narrow-angle glaucoma or trouble emptying your bladder, for example from an enlarged prostate, before starting.
- Blood pressure is checked on mirabegron; it is not used when blood pressure is severely uncontrolled.
- Blood in the urine, pain or a urinary tract infection should be evaluated before these symptoms are treated as overactive bladder.
Common Questions About Overactive Bladder Medications
Which overactive bladder medicine has the fewest side effects?
Beta-3 agonists such as mirabegron and vibegron cause less dry mouth and constipation and do not have the anticholinergic effects on memory. Among antimuscarinics, extended-release forms and the oxybutynin patch or gel cause less dry mouth than immediate-release oxybutynin. Insurance plans often ask that a generic antimuscarinic be tried first.
How long do overactive bladder medicines take to work?
Some people notice fewer urges within a week or two, but the full benefit can take 4 to 8 weeks. Give a medicine that long, at a steady dose, before deciding it has not helped. Keeping a bladder diary makes the change easier to judge.
What if overactive bladder pills do not work?
Options include switching to the other drug family or combining an antimuscarinic with a beta-3 agonist. Beyond pills, a urologist can offer Botox injections into the bladder or nerve stimulation treatments. Bladder training, pelvic floor exercises and cutting back on caffeine help at every stage.
This guide is general information, not a substitute for advice about your own medicines. Do not start, stop or switch a medication without talking with your doctor. Questions about a prescription? Our internal medicine team can help.
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