Zyrtec oral drops contain cetirizine dihydrochloride, an antihistamine medication used to relieve allergy symptoms like sneezing, runny nose, watery eyes, and itching. Each ml contains 10mg of the active ingredient in a 10ml bottle format. Zyrtec (cetirizine) is a second-generation antihistamine that works by blocking histamine receptors, which helps reduce allergy symptoms. The oral drops format allows for precise dosing and is particularly suitable for those who have difficulty swallowing tablets. The medication typically starts working within one hour and can provide 24-hour relief. As with all medications, it should be used according to physician instructions and proper dosing guidelines should be followed.