Zaditor Antihistamine Drops. Temporarily relieves itchy eyes due to pollen, ragweed, grass, animal hair and dander. Up to 12 hours relief. Works in minutes. Original prescription strength. For ages 3 years and older. 30 day supply. Directions: Adults and children 3 years of age and older: Put 1 drop in the affected eye(s) twice daily, every 8-12 hours, no more than twice per day. Children under 3 years of age: Consult a doctor. Other Information: Only for use in the eye. Store between 4-25 degrees C (39-77 degrees F). Active Ingredients: Ketotifen 0.025 % Inactive Ingredients: Benzalkonium Chloride; Glycerol; Purified Water; Sodium Hydroxide and/or Hydrochloric Acid Warnings: For external use only. Do not use: If solution changes color or becomes cloudy; If you are sensitive to any ingredient in this product; To treat contact lens related irritation. When using this product: Do not touch tip of container to any surface to avoid contamination; Remove contact lenses before use; Wait at least 10 minutes before reinserting contact lenses after use; Replace cap after each use. Stop use and ask a doctor if you experience any of the following: Eye pain; Changes in vision; Redness of the eye; Itching worsens or lasts for more than 72 hours. Keep out of reach of children. If swallowed, get medical help or contact a Poison Control Center right away.