The strange history of the EpiPen, the device developed by the military that turned into a billion-dollar business and now faces generic competition between Mylan and Teva

In 2016, the EpiPen became a symbol of the drug-pricing problem in the US. Over a decade, the price for a two-pack has gone up from $93.88 to $608.61, an increase of more than 500%. On Thursday, the FDA approved Teva's generic version of the drug, dealing a blow to branded EpiPen-maker Mylan. The …