US President Donald Trump (R), alongside Secretary of Health and Human Services Robert F. Kennedy Jr. (L), speaks about autism at the White House in Washington, DC on September 22, 2025

US President Donald Trump (R), alongside Secretary of Health and Human Services Robert F. Kennedy Jr. (L), speaks about autism at the White House in Washington, DC on September 22, 2025

The Trump administration did an about-face Tuesday on an autism treatment it had promoted with great fanfare.

It had said back in September it would approve use of a drug called leucovorin -- synthetic vitamin B9 -- to treat the disorder. 

Originally published on doc.afp.com, part of the BLOX Digital Content Exchange.

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