One drop daily can stop the itch and keep your eyes feeling comfortable and refreshed for up to 12 hours. Systane ZADITOR allergy eye drops temporarily relieve itchy eyes due to pollen, ragweed, grass, animal hair and dander for ages 3 and up. Our antihistamine eye care is original prescription strength, which means our eye drops work in minutes to help reduce allergy-related itchiness. Stop worrying about itchy eyes! With Systane ZADITOR, you are always one drop away from long-lasting eye allergy relief. Shop the entire assortment of Systane ZADITOR eye products online or in your local Walmart store!