Olopatadine 0.2% Once Daily Drops, 2.5 ml, QC99823 Sale! This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Compare to the Active Ingredients in Pataday. Temporarily relieves itchy eyes due to pollen, ragweed, grass, animal hair, and dander. Once daily relief and works in minutes. For ages 2 and over. Sterile