Get fast eye allergy itch relief with Pataday Once Daily Relief Extra Strength, the first and only full 24-hour eye allergy itch relief drop available without a prescription. A single drop of Pataday Once Daily Relief Extra Strength features the ingredient doctors prescribed most for eye allergy itch relief caused by pollen, ragweed, grass, animal hair and dander. Pataday Once Daily Relief Extra Strength is applied directly to the eye to reduce itchy allergy symptoms fast by working directly on the cells that make eyes itch for a full 24-hours.