Though it’s not the most outrageously priced lifesaving drug, insulin is one of the most common and has become Exhibit A in the national outcry. The doctors who discovered insulin sold their patent to the University of Toronto for only $1, intending it as a gift to humanity. Between 2009 and 2017, the cost of a single vial of Humalog rose from $92.70 to $274.70. It cost only $21 when marketed as the first short-acting insulin in 1996. Feeling political pressure, Eli Lilly & Co., the manufacturer, is now offering the same drug as a generic at half price. But that’s still $45 more than it cost just 10 years ago.