Betadine Cold Defense Nasal Spray is a natural, drug-free nasal spray designed to help stop colds early. It contains Carragelose and is steroid-free, making it a safe option for preventing and treating early cold symptoms by creating a protective barrier in the nasal passages. The 20ml nasal spray uses natural Carragelose technology to help trap and inactivate cold viruses in the nasal passages. Being drug-free and steroid-free means it can be used safely without risk of dependency or rebound effects. The product works by forming a protective barrier in the nose to help prevent cold viruses from taking hold and multiplying.