I purchased a doctors cold sore solution for the treatment of coldsores from the ebay user dr_solution. I get cold sores often and I have used Zovirax (prescription) and Abreva (off the shelf) to no effect to combat the cold sores. I feel that the doctors solution for cold sores works better to lessen the severity and duration of the coldsore. I purchased the treatment from dr_solution with hesitation, after all how could a simple looking product available on ebay compete with products manufactured by multi-national companies, packaged in fancy boxes and available everywhere? Well I am delighted to report that having now used it I will be disposing of the Abreva in the trash! The dr_solution product is fantastic, much faster acting than I ever would have imagined, my cold sores disappeared overnight as opposed to making the sore bearable over a several day period until it heals. Definitely recommended! A++!! The company's website is www.doctorscoldsore.com or just look up dr_solution on ebay