One drop can stop the itch. Antihistamine Novartis, 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.Inactive Ingredients:Benzalkonium Chloride 0.01%; Glycerol; Sodium Hydroxide and/or Hydrochloric Acid; Purified WaterUses:Temporarily relieves itchy eyes due to pollen, ragweed, grass, animal hair and dander. Works in minutes. Original prescription strength. For ages 3 years and older. Only for use in the eye.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.