DESC: Similasan’s unique “Active Response Formula” quickly stimulates the eye’s natural ability to cool and soothe itching, burning and watering of allergy eyes. This sting-free formula has no known side effects, contra-indications or drug interactions. Similasan Eye Drops contain no harsh chemicals and will not cause reliance or rebound. Use this and other Similasan products with confidence in their safety, no matter what your age or health status. Simulasan products have provided long-term, Healthy Relief to millions of people for over 20 years.