STAFEN Eye Drops sterile eye drop solution that helps to reduce allergic conjunctivitis (redness and irritation) in the eyes. The active ingredient is Ketotifen, a drug that blocks the chemicals that trigger allergic reactions in the body, such as histamine, prostaglandins, leukotrienes, etc. The drops are easy to use and provide rapid relief from redness and irritation, and the effects persist for 8 to 12 hours. STAFEN Eye Drops are the perfect solution for anyone looking to reduce redness and irritation in their eyes.