As Maggie Koerth and Amelia Thomson-DeVeaux wrote for 538:
Despite the name, the accelerated approval process was used to subject mifepristone to heavier regulation and more monitoring after it was approved. It certainly did not speed up approval. From start to finish, approving mifepristone took 54 months. The average length of the process for all other drugs approved in 2000 was 15.6 months.