Do not take this medication if you are allergic to tolterodine, if you have uncontrolled glaucoma, or if you have a blockage of the urinary tract, stomach, or intestines.
Before taking tolterodine, tell your doctor if you have a personal or family history of "Long QT syndrome.”
Do not crush, chew, break, or open a controlled-release capsule. Swallow the pill whole. It is specially made to release medicine slowly in the body. Breaking or opening the pill would cause too much of the drug to be released at one time.
Tolterodine can cause side effects that may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be awake and alert.
Avoid drinking alcohol. It can increase some of the side effects of tolterodine.
There are many other medicines that can interact with tolterodine. 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.