Other Information: Active ingredients are manufactured according to homeopathic principles. Sterile eye drops. Formulated with natural active ingredients. Use as often as needed: itching; burning; watering; redness. No harsh vasoconstrictors. Homeopathic. Original swiss formula.Similasan works differently than most medicated drops. Formulated with natural active ingredients and trusted for over 35 years in the cold, dry, and pollen heavy climate of Switzerland, it gently stimulates your body's natural ability to temporarily relieve symptoms. Feel good about feeling better. www.SimilasanUSA.com. Questions? Reach our representatives at 1-800-240-9780. Claims based on traditional homeopathic practice, not accepted medical evidence. Not FDA evaluated. Made in Switzerland.