Key differences between Zyrtec and Zyrtec-D include their active ingredients, the minimum age at which they can be used, purchasing restrictions, and available dosage forms. Moreover, because it ...

Zyrtec’s active ingredient is cetirizine, which was introduced much later – in 1995 for prescription use and as an OTC option in 2007. “Benadryl doesn't break down well in humans ...

The company has been exclusively distributing and marketing Zyrtec (active ingredient cetirizine hydrochloride), the top-selling allergy treatment in the domestic antihistamine market, since 2023.