One drop can stop the itch.AntihistamineNovartis Phr Active Ingredients: Ketotifen (0.025%) (Equivalent to Ketotifen Fumarate 0.035%)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.