The EpiPen totally dominates the market. Either people don't know about the cheaper alternatives, or they do - but don't want to buy them. Business Insider looked at the number of prescriptions ...

“EpiPen is what the babysitter uses, it’s what grandparents know how to use ... “[Mylan] could not do this in a competitive market, because in a competitive market, no one has to buy EpiPens.” Baldock ...