Other Information: Active ingredients are manufactured according to homeopathic principles. Misc: Homeopathic. Original Swiss formula. Formulated with natural active ingredients. Use as Often as Needed: redness; stinging; itching; irritation. No harsh vasoconstrictors. Questions? Reach our representatives at 1-800-240-9780. www.SimilasanUSA.com. Facebook. Twitter. Similasan works differently than regular medicated drops. Formulated with natural active ingredients trusted for over 30 years in the cold, dry, and pollen heavy climate of Switzerland. It stimulates your body's natural ability to temporarily relieve symptoms. Feel good about feeling better. Made in Switzerland.