WASHINGTON (AP) — The Food and Drug Administration on Wednesday approved a groundbreaking new drug for the most common form of pancreatic cancer, offering U.S. patients a more effective treatment against one of the deadliest types of cancer.

FDA officials gave expedited approval to the first-of-a-kind pill, called daraxonrasib, that blocks a mutated protein that fuels tumor growth in more than 90% of pancreatic cancer cases. It’s an approach that previously eluded drugmakers for decades.