Pataday Once Daily Relief is the first once-daily eye allergy itch relief drop that's available without a prescription. A single drop of Pataday Once Daily Relief works directly on the cells that make eyes itch. Temporarily relieves itchy eyes due to pollen, ragweed, grass, animal hair and dander. With the ingredient doctors prescribe most for eye allergy itch relief. For external use only. This item may be eligible for FSA and HSA reimbursement. For any questions you may have regarding FSAs or HSAs, please browse our FAQ.