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ZYRTEC® Products

Explore the full line of ZYRTEC® allergy symptom relief products. Choose from fast-acting relief tablets or quick relief for drops.

Zyrtec Products

ZYRTEC® Products

Explore the full line of ZYRTEC® allergy symptom relief products. Choose from fast-acting relief tablets or quick relief for drops.

Zyrtec Products
Zyrtec Products

ZYRTEC® Products

Explore the full line of ZYRTEC® allergy symptom relief products. Choose from fast-acting relief tablets or quick relief for drops.

What are Antihistamines and How Do They Work?

If you happen to be part of the 1 in 5 Aussies and Kiwis who suffer from hayfever or seasonal allergies (also known as allergic rhinitis), you have probably heard of the class of medications called antihistamines.