What is the most important information about Toviaz?

Before you take Toviaz (fesoterodine extended-release tablet), tell your doctor about any allergies or medical conditions you have. Tell your doctor if you have liver or kidney disease, trouble urinating, severe constipation, a muscle disorder such as myasthenia gravis, glaucoma or a personal or family history of heart conditions such as long-QT syndrome. Before you take Toviaz, tell your doctor if you are pregnant, breastfeeding or wish to become pregnant.

While taking Toviaz, do not expose yourself to hot or humid environments for extended periods of time, as Toviaz can decrease your ability to sweat normally and thereby increase your risk of heat stroke.