The problem of counterfeit and falsified medicines is not just an economic problem for the pharmaceutical industry, but also a threat to public health. TruTag Technologies is seeking to address the problem with its nano-scale technology that allows drugmakers to encode information on individual doses of medication to authenticate a drug and provide details on its origin and intended market. We spoke to Barry McDonough, senior vice president of business development for TruTag, about the technology, how it works, and how it can address a global health concern.