Before using Zyrtec tell your doctor about all your medical conditions or allergies, all medicines you use, and if you are pregnant or breastfeeding.
Zyrtec may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be alert. Drinking alcohol can increase certain side effects of cetirizine.
Tell your doctor if you regularly use other medicines that make you sleepy (such as other cold or allergy medicine, narcotic pain medicine, sleeping pills, muscle relaxers, and medicine for seizures, depression, or anxiety). They can add to sleepiness caused by Zyrtec. Call your doctor if your symptoms do not improve, if they get worse, or if you also have a fever.
Before taking this medicine
You should not use Zyrtec if you are allergic to cetirizine or levocetirizine.
Ask a doctor or pharmacist if it is safe for you to take cetirizine if you have any medical conditions.
Ask a doctor before using this medicine if you are pregnant or breastfeeding.
How should I use Zyrtec?
Zyrtec is taken by mouth.
Use Zyrtec exactly as directed on the label, or as prescribed by your doctor.
Older adults may need to take a lower than normal dose. Follow your doctor's instructions.
You may take this medicine with or without food.
Do not swallow the Zyrtec orally disintegrating tablet whole. Allow the tablet to dissolve in your mouth without chewing. Swallow several times as the tablet dissolves. If desired, you may drink liquid to help swallow the dissolved tablet.
Measure liquid Zyrtec Syrup carefully. Use the dosing syringe provided, or use a medicine dose-measuring device (not a kitchen spoon).
Call your doctor if your symptoms do not improve, if they get worse, or if you also have a fever.
Store at room temperature away from moisture and heat. Do not allow liquid medicine to freeze.
