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Causes of overactive bladder (OAB) symptoms

What causes OAB symptoms?

See what may go on inside an overactive bladder.

What happens to cause overactive bladder Watch now

OAB happens when the bladder muscle starts squeezing to push urine out before you’re ready to go — even if your bladder isn’t full. Normally, you can control the muscles that keep urine in the bladder so you go only when you want to. But sometimes you may leak urine when you don't want to. This condition is called urinary incontinence.

How you manage your bladder problems could also contribute to aggravating your symptoms. For example, if you go to the bathroom “just in case,” you may actually train your bladder to go more often. Similarly, if you intentionally cut back on how much water you drink, you may increase your risk of constipation. And constipation can impact your OAB symptoms.

That’s why it’s important to talk to your doctor about OAB and ask about treatment options including prescription Toviaz® (fesoterodine fumarate).

Other causes of bladder symptoms

Sometimes bladder control problems are also caused by stress incontinence. Stress incontinence is when urine leaks due to activities such as coughing, sneezing, or heavy lifting. This is caused by weakness of the muscles that help hold urine in the bladder. Stress incontinence is different from OAB, and Toviaz does not treat stress incontinence.

In some cases, symptoms like urgency and frequency can also have causes other than OAB:

  • Certain medicines, like those that treat swelling
    (fluid retention) or high blood pressure
  • Constipation
  • An infection or something more serious

Toviaz does not treat these conditions.

Be sure to talk with your doctor about your symptoms, since only he or she can diagnose OAB.

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Videos explaining overactive bladder and how Toviaz is thought to work

Important Safety Information

If you have certain stomach problems, glaucoma, or cannot empty your bladder, you should not take Toviaz® (fesoterodine fumarate).

Medicines like Toviaz can cause blurred vision, drowsiness, and decreased sweating. Use caution when driving, doing unsafe tasks, or in especially hot environments, until you know how Toviaz affects you. Drinking alcohol while taking medicines such as Toviaz may cause increased drowsiness.

The most common side effects are dry mouth and constipation.


Toviaz treats the symptoms of overactive bladder( leaks, strong urges to go, going too often).

Toviaz has benefits and risks. There may be other options. To learn more about Toviaz, please see the Full Prescribing and Patient Information.

Did you know?  Quick tips about OAB

OAB is not a normal part of getting older but a treatable medical condition.