Cetirizine is the generic form of the brand name medicine Zyrtec. It’s used to treat allergy symptoms, such as:
Zyrtec is in a class of drugs called antihistamines. It works by blocking the action of a substance in your body called histamine.
This medicine comes in both an oral and injection form and is also available in different combination products.
Medically Reviewed by Robert Jasmer, MDYou should not use this medicine if you are allergic to cetirizine or similar medicines such as: levocetirizine or hydroxyzine.
Tell your doctor if you are pregnant or breastfeeding.
Ask a doctor or pharmacist before using cetirizine if you have any health problems. oral
Tell your doctor if you have or have ever had:
Get emergency medical help if you have : hives, difficult breathing, swelling of your face, lips, tongue, or throat. signs of an allergic reaction
Common side effects may include:
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.