Solifenacin reduces muscle spasms of the bladder and urinary tract.

Solifenacin is used to treat symptoms of overactive bladder, such as frequent or urgent urination, and incontinence (urine leakage).

Solifenacin may also be used for other purposes not listed in this medication guide.

You should not use this medication if you are allergic to solifenacin, or if you have untreated or uncontrolled narrow-angle glaucoma, a blockage in your digestive tract (stomach or intestines), or if you are unable to urinate.

Before using solifenacin, tell your doctor if you have glaucoma, liver disease, kidney disease, a blockage in your stomach or intestines, or a history of "Long QT syndrome."

Avoid becoming overheated or dehydrated during exercise and in hot weather. Solifenacin can decrease perspiration and you may be more prone to heat stroke.

Solifenacin can cause side effects that may impair your vision or reactions. Be careful if you drive or do anything that requires you to be alert and able to see clearly.

There are many other medicines that can interact with solifenacin. Tell your doctor about all the prescription and over-the-counter medications you use. This includes vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start using a new medication without telling your doctor. Keep a list with you of all the medicines you use and show this list to any doctor or other healthcare provider who treats you.

Stop using this medication and call your doctor if you have serious side effects such as hot and dry skin, extreme thirst, severe stomach pain or constipation, pain or burning when you urinate, or if you stop urinating.

You should not use this medication if you are allergic to solifenacin, or have certain conditions. Be sure your doctor knows if you have:

• untreated or uncontrolled narrow-angle glaucoma;

• a stomach disorder causing delayed emptying; or

• if you are unable to urinate.

Before using solifenacin, tell your doctor if you are allergic to any drugs, or if you have:

• glaucoma;

• liver disease;

• kidney disease;

• a blockage in your stomach or intestines; or

• a history of "Long QT syndrome."

If you have any of these conditions, you may need a dose adjustment or special tests to safely take solifenacin.

FDA pregnancy category C. This medication may be harmful to an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant during treatment.

It is not known whether solifenacin passes into breast milk or if it could harm a nursing baby. Do not use this medication without telling your doctor if you are breast-feeding a baby.