What is Zyrtec: Uses, Warnings & Interactions

Claritin and Zyrtec belong to the same drug class. They should not be taken together because of their similar mechanisms of action. Learn more here.

Zytec starts working about an hour after taking it and lasts around 12 hours. Learn more Zyrtec and how long it takes to work here.

A Zyrtec generic, cetirizine, is available. Learn the difference in cost, dosages, and how to switch to a generic Zyrtec.

Zyrtec is safer than Benadryl but can still cause fatigue and sleepiness, increasing the risk of falls and injury in older adults

Headache and drowsiness are common Zyrtec side effects. Learn how long side effects of Zyrtec last and how to avoid them.

Zyrtec causes drowsiness in up to 14% of people. Factors that affect your risk of drowsiness include dosage, time of day, alcohol use, and other medications.

Yes, Zyrtec is considered safe during all trimesters of pregnancy but should only be used when necessary. Learn the risks and alternatives for Zyrtec while pregnant.

Zyrtec can be used in dogs to treat allergic reactions, atopic dermatitis, hives, or bites. Learn the Zyrtec dosage for dogs and the potential side effects.

Loratadine, fexofenadine, levocetirizine, diphenhydramine, and Allegra-D are some cetirizine alternatives. Get the full list here, including natural antihistamines.