You should talk with your healthcare provider prior to taking this medication if you have:
- Liver disease, including liver failure, cirrhosis, or hepatitis
- Kidney disease, such as kidney failure (renal failure)
- Digestive problems (especially those than involve slow emptying of food from the stomach)
- Myasthenia gravis
- Difficulty passing urine
- An enlarged prostate (also known as benign prostatic hyperplasia, or BPH)
- Any allergies, including allergies to food, dyes, or preservatives.
Also, let your healthcare provider know if you are:
- Pregnant or thinking of becoming pregnant (see Toviaz and Pregnancy)
- Breastfeeding (see Toviaz and Breastfeeding).
Make sure to tell your healthcare provider about other medicines you are taking, including prescription and non-prescription medicines, vitamins, and herbal supplements.
(Click Precautions and Warnings With Fesoterodine to learn more, including information on who should not take the drug.)
An overactive bladder is often due to bladder muscle contractions that are too frequent and uncontrollable. Fesoterodine works by helping to relax the muscles of the bladder, thereby helping to relieve many of the symptoms of an overactive bladder. Specifically, fesoterodine is part of a group of medications known as antimuscarinics or anticholinergics. It works by blocking specific receptors (called muscarinic receptors) in the bladder.