With cold season in full swing and multiple strains of a deadly flu ravaging the country this winter, for most people, staying healthy and finding relief when necessary is a top priority. But what you may not realize is that the very medicines that help provide that much-needed relief from cold and flu symptoms could be doing a number on your oral health. That’s because, according to Wexford, Pennsylvania, dentist Alexandra George, some over-the-counter (and even some prescription) medications are packed with a sneaky hidden ingredient: sugar.