Padagis/Perrigo Cetirizine Hydrochloride 10 mg Antihistamine Allergy - 300 Tablets. Compare to the active ingredient in the leading brand for sneezing, runny nose, itchy, watery eyes, itchy throat or nose. Original prescription strength Indoor and outdoor allergies. Antihistamine. Please Note: Perrigo is now called Padagis. They are the same company.