Weekly Ad Digital Coupons Curbside Pickup Favorites FAQs ⓘ Zaditor Eye Itch Relief 0.17 ozKetotifen fumarate ophthalmic solution. Antihistamine eye drops. Sterile. Up to 12 hours. Works in minutes. For ages 3 years and older. 30 day supply. Up to 12 hour itch relief. Made in Canada.