How should I use cetirizine?
Cetirizine oral is taken by mouth.
Cetirizine injection is given as an infusion into a vein. A healthcare provider will give you this injection once every 24 hours as needed to treat hives.
Use cetirizine oral 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 cetirizine with or without food.
You must chew the chewable tablet before you swallow it.
Do not swallow the dissolving tablet whole. Allow it 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 medicine 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.