Man's medication went from $400/month to $40,000/month

Neven Mrgan takes a prescription drug called Cuprimine. Without it, he would slowly die from liver disease. Unfortunately, the price of Cuprimine has gone from $400-$1,700/month to $44,000/month. Curprimine is made by Valeant Pharmaceuticals, run by billionaire J. Michael Pearson. He's stepping down, not because he jacked up the price of Cuprimine and other medications, but because the company's misstated earnings hurt its stock value.

From a 2016 NYT article about Valeant's drug price strategy:

Cuprimine is just one of many Valeant drugs whose prices have spiked as part of the companys concerted strategy, which has richly rewarded its investors and made it one of Wall Streets most popular health stocks.

But Valeants habit of buying up existing drugs and raising prices aggressively, rather than trying to develop new drugs, has also drawn the ire of lawmakers and helped stoke public outrage against the growing trend of higher and higher drug prices imposed by big drug companies. This year alone, Valeant raised prices on its brand-name drugs an average of 66 percent, according to a Deutsche Bank analysis, about five times as much as its closest industry peers.