Ingredients for Zaditor Antihistamine Itch Relief Eye Drops, 0.16 fl oz

Active Ingredients: Ketotifen (0.025%), (Equivalent to Ketotifen Fumarate 0.035%)..

Inactive Ingredients: Benzalkonium Chloride 0.01%, Glycerol, Purified Water, Sodium Hydroxide, or Hydrochloric Acid.