Before you being using a medication, be sure to inform your doctor of any medical conditions or allergies you may have, any medications you are taking, whether you are pregnant or breast-feeding, and any other significant facts about your health. These factors may affect how you should use this medication.
Abnormal heart rhythm: This medication may cause or increase the risk for a certain type of abnormal heart rhythm called QT prolongation. Other medications can also increase the risk of QT prolongation when taken together with tolterodine. This abnormal heart rhythm is more likely to occur in women, seniors, and people with certain risk factors such as:
- heart disease
- other heart rhythm problems (such as atrial fibrillation)
- a history of stroke
- a family history of sudden cardiac death
- blood electrolyte disturbances
- abnormally slow heartbeat
- eating disorders
- nerve disorders
If you experience symptoms of an abnormal heart rhythm such as dizziness, heart palpitations (fast, pounding, or irregular heartbeat), fainting, or seizures, stop taking this medication and get immediate medical attention.
Bladder problems: People with conditions that significantly block or obstruct the bladder should be closely monitored by their doctor for urinary retention while taking this medication.
Driving/using machinery: Tolterodine may cause fatigue or blurred vision. Avoid activities requiring mental alertness, such as driving, operating machinery, or performing hazardous work, if the medication affects you in this way. Alcohol and other medications that cause drowsiness may increase the drowsiness caused by tolterodine.
Glaucoma: People who have controlled narrow-angle glaucoma should discuss the benefits and risks of this medication with their doctor. Tolterodine may worsen this condition.
Kidney or liver disease: People with liver disease or kidney disease may be more at risk of experiencing side effects and may require lower doses of this medication.
Stomach problems: People with stomach problems affecting passage and digestion of food should discuss with their doctor how this medication may affect their medical condition, how their medical condition may affect the dosing and effectiveness of this medication, and whether any special monitoring is needed.
Pregnancy: This medication should not be used during pregnancy unless the benefits outweigh the risks. If you are or may be pregnant, talk to your doctor about the benefits and risks of using this medication. Women who may become pregnant should use adequate contraception (birth control) while taking this medication.
Breast-feeding: It is not known if tolterodine passes into breast milk. If you are a breast-feeding mother and are taking this medication, it may affect your baby. Talk to your doctor about whether you should continue breast-feeding.
Children: The safety and effectiveness of using this medication have not been established for children.