Zyrtec is a prescription medication that is used to treat allergy and cold symptoms including sneezing, watery eyes, itching, and runny nose. Zyrtec contains the antihistamine drug cetirizine that works by reducing the effects of histamine in the body.

Make sure to always read the patient information and instructions before using this medication. Always follow your doctor’s directions.

• Zyrtec can be taken with or without food.
• Do not increase your dosage or the frequency that you take this medication.
• Speak to your doctor if your symptoms do not improve.

Tell your doctor and pharmacist:

• About your drug and other allergies.
• If you take any other prescription or over-the-counter medications.
• Your medical history.
• If you are pregnant or planning pregnancy.
• If you are breast-feeding.

You should also know:

• This medication can affect your reactions. Do not drive or operate machinery until you can do so safely.
• Avoid drinking alcohol as this can increase the side effects of this medication.

Common side effects of Zyrtec include but are not limited to:

• Headaches
• Dizziness
• Tiredness or drowsiness
• Dry mouth
• Constipation

Get medical help if you have any of the following side effects of cetirizine:

• Restlessness or hyperactivity
• Fast, pounding, or irregular heartbeat
• Confusion
• Vision problems
• Little or no urination
• Sleep problems
• Weakness or tremors
• Symptoms of an allergic reaction such as difficulty breathing, hives, or swelling in your face, lips, or throat

What should I do if I miss a dose of Zyrtec?

If you miss a dose of Zyrtec, you should take it as soon as you remember. However, if it is almost time for your next dose, then skip your missed dose.

What is the generic alternative to Zyrtec?

Generic Zyrtec is called cetirizine.