Last updated: 30th December, 2019 Cetirizine is an allergy medication that you can buy OTC (over-the-counter) at a medical store. That is, you don’t need a prescription. Cetirizine is used for the treatment of hay fever, seasonal allergies, and hives. Get to know how Cetirizine works, its side effects, precautions, and contraindications where Cetirizine is not suggested. […]