Bresch, who started out in a low-level position in quality control at one of the company's factories, is the first female head of a large pharmaceutical company. She made a name for herself by turning the EpiPen — once an obscure injection device for allergy sufferers that she calls her "baby" — into a blockbuster billion-dollar drug. But the 47-year-old has found herself in the hot seat in recent weeks as consumers and lawmakers have expressed outrage over the rising cost of the drug and have called for investigations into the company's pricing practices.