Off-Label Drug Helps One Boy With Autism Speak, Parents Say. But Experts Want More Data. This week, the FDA began the process of approving leucovorin, an inexpensive, generic drug derived from folic acid, to help children diagnosed with autism. Previous article: ‘Historic’ White House Announcement on Autism and Tylenol Causes Confusion Prev Next article: Listen: Young Adults Turning 26 Face Health Insurance Cliff Next