Active Ingredient

Cetirizine

Cetirizine is an antihistamine commonly used to relieve allergy symptoms. It helps manage reactions such as sneezing, itching, and runny nose.

This medication is often utilized in situations where individuals experience discomfort due to environmental allergens or seasonal changes.

Written By Douglas C. Goldberg, MD

Reviewed By Philip Schein, MD

Last Updated 28 Nov 2025

Available Cetirizine Brands

Zyrtec

Strengths 10mg

Cetirizine Uses

Cetirizine is typically used to treat a variety of allergy-related conditions.

Allergic rhinitis, including hay fever
Chronic urticaria (hives)
Itchy eyes and throat
Skin allergies
Runny or itchy nose

How Cetirizine Works

Cetirizine works by blocking the action of histamine, a substance in the body that causes allergic symptoms. By preventing histamine from binding to its receptors, it reduces symptoms like itching and swelling.

This action helps alleviate discomfort associated with allergies and improves overall quality of life during allergy seasons.

Common side effects of Cetirizine

Not everyone experiences side effects from cetirizine, and many are mild and temporary.

Drowsiness
Fatigue
Dry mouth
Dizziness
Headache
Stomach pain
Sore throat

If you experience serious or persistent symptoms, contact your doctor for advice.

Avoid driving or operating heavy machinery if you feel drowsy after taking cetirizine.
Limit alcohol consumption as it can increase drowsiness.
Inform your doctor of any other medications or supplements you are taking to avoid interactions.
Do not use cetirizine if you have severe kidney problems without consulting a doctor.
Monitor your symptoms and seek medical advice if they worsen or do not improve.

Always consult your doctor for personalized medical advice.

Frequently Asked Questions

What is cetirizine used for?

Cetirizine is used to relieve allergy symptoms such as runny nose, sneezing, and itchy eyes.

How long does it take for cetirizine to work?

Cetirizine usually starts working within an hour of taking it, providing relief from allergy symptoms.

Can I take cetirizine if I'm pregnant?

If you are pregnant, consult your doctor before taking cetirizine to ensure it is safe for you.

Is it safe to drink alcohol while taking cetirizine?

It is advisable to limit alcohol consumption as it can increase the sedative effects of cetirizine.

Can cetirizine be taken with other medications?

You should inform your doctor about any other medications you are taking to avoid potential interactions.