U.S. Sen. Bernie Sanders wants to know why a drug that at one time was free now costs $375,000 per year.
The drug in question is called Firdapse. In the past, patients were able to get it for free from a different drugmaker under the FDA's "compassionate use" program.
But when Catalyst got approval for and rights to the drug last year, it announced the new cost would be $375,000 annually.
Calling it an "immoral exploitation of patients who need this medication," Sanders demanded the company answer questions about the factors that went into their pricing decision.
So far this year, several pharmaceutical companies have either confirmed or are planning price hikes in 2019, despite pressure from the White House to slash costs for consumers.
The Trump administration's unveiled plans and proposals to rework the U.S. drug pricing system, and last month, Sanders and other congressional leaders introduced three bills that aim to curb rising prescription drug costs.
Catalyst has until Feb. 18 to send Sanders the requested information. So far, the company hasn't issued a public comment about the letter.