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AllergyCast app
Allergy Forecast

Discover Your Allergy Forecast with ZYRTEC®

Get allergy forecasts & see pollen counts near you today with our online allergy index tool or try the ALLERGYCAST® app for a personalized allergy forecast & tracker.
Cetirizine hydrochloride chemical structure
Allergy Treatment

What Is Cetirizine Hydrochloride (HCl), And What Is It Used For?

Cetirizine is an antihistamine often used to treat allergy symptoms. In this guide, we explore how it works, its side-effects and correct dosage.
Allergy Treatment

Allergy Muddlers in America

Read facts about how allergy symptoms are on the rise and learn how you can find relief from your worst allergy symptoms with ZYRTEC®.
Infographic titled "6 things to Know About Sinuses"
Allergy Symptoms

6 Things to Know About Sinuses

You know sinuses are in your head, but have you ever wondered exactly what they are? Here are some things to know about sinuses.
Antihistamines and How Do They work
Allergy Treatment

What are Antihistamines and How Do They Work?

Learn all about antihistamines, including what they are, how they work, what they treat & more. Plus, find answers to frequently asked questions about antihistamines.

Itchy, Runny Nose from Allergies
Allergy Symptoms

Itchy, Runny Nose from Allergies: Causes, Symptoms and Relief

Got an itchy nose, or a nose that won’t stop running? It could be due to allergies, or allergic rhinitis. Discover itchy & runny nose causes, symptoms & treatments.
Woman, laying down, squeezing lemon into her mug next to a pile of tissues, honey and a thermometer
Allergy Symptoms

Itchy Throat from Allergies: Causes and Treatment

An itchy throat can feel scratchy, ticklish, and uncomfortable – especially irritating when you talk or swallow.

Illustration of a bathroom with yellow walls, a bathtub and a window with a bird outside
Understanding Allergies

About Mold & Mildew Allergies: Symptoms, Treatment & Prevention

Think you have a mold allergy? Find out how to get rid of mold and how to find relief for your symptoms. Manage your allergies with ZYRTEC® today.
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