Betadine Cold Defense Nasal Spray is a protective nasal spray designed to help prevent and treat cold symptoms. It creates a protective barrier in the nasal passages that helps trap and inactivate cold viruses, reducing the risk of catching a cold or shortening its duration. This is a medical product intended for nasal use. The 20ml size makes it convenient for travel and regular use. As with any nasal spray, users should carefully read and follow the instructions for proper application and dosage. Please consult with a healthcare professional before use if you have specific medical conditions or are taking other medications.