The makers of the EpiPen failed to properly investigate more than 100 complaints that the device malfunctioned during life-threatening emergencies — including situations in which patients later died, according to a Food and Drug Administration warning letter sent to a Pfizer company.https://www.washingtonpost.com/news/wonk/wp/2017/09/07/epipen-maker-failed-to-investigate-product-failures-associated-with-patient-deaths-fda-says/?utm_term=.d818c6678020