Get fast eye allergy itch relief with Pataday Once Daily Relief, the first once daily eye allergy itch relief drop that is available without a prescription. A single drop of Pataday Once Daily Relief features the ingredient doctors prescribe most for eye allergy itch relief caused by pollen, ragweed, grass, animal hair and dander. Pataday Once Daily Relief is applied directly to the eye to reduce itchy allergy symptoms fast by working directly on the cells that make eyes itch for up to 16 hours.