Get clear with Clera. Their patented advanced forumla is clinically shown to eliminate cold sores in as fast as 2 days. Prevents cold sores from occurring when applied at first sign of itching/tingle. Shortens healing time by 2 days or more. Soothes the symptoms of cold sores. Using Clera can result in smaller cold sore lesions and fewer recurrences without leading to resistant strains of the herpes virus.