Warnings and precautions to be aware of prior to taking VESIcare include the following:
In studies, high doses of VESIcare increased the risk of a potentially dangerous irregular heart rhythm called QT prolongation. If you already have an arrhythmia (especially long QT syndrome), VESIcare may make it worse.
VESIcare can slow down the digestive system. This can cause problems, especially for people who already have a slow digestive system due to other medical problems.
This medication may make glaucoma worse. If you have glaucoma and take VESIcare, your healthcare provider may need to monitor you more closely.
The kidneys and liver help to remove VESIcare from your body. Therefore, if you have kidney or liver disease, you may require extra monitoring by your healthcare provider and may need to take a lower VESIcare dosage.
VESIcare can cause blurred vision, dizziness, and drowsiness. Make sure you know how the medicine affects you before driving or operating heavy machinery.
VESIcare can decrease your ability to sweat, which may increase your risk of heat stroke. Be sure to stay well hydrated in the heat.
VESIcare is considered a pregnancy Category C medication. This means that it may not be safe for use during pregnancy, although the full risks are not known (see VESIcare and Pregnancy).
It is not known whether VESIcare passes through breast milk. Therefore, if you are breastfeeding or plan to start, discuss this with your healthcare provider prior to taking the drug (see VESIcare and Breastfeeding).