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A 2025 White House claim linking acetaminophen to autism caused a sharp drop in its use during pregnancy and a surge in leucovorin prescriptions for autistic children, despite no new evidence.
In September 2025, a White House briefing linking acetaminophen use during pregnancy to autism and promoting leucovorin as a treatment resulted in a 10% decrease in acetaminophen prescriptions for pregnant women in emergency rooms, but no similar drop in non-pregnant patients.
Outpatient leucovorin prescriptions for children aged 5 to 17 increased 71% above expectations, with autistic children accounting for 72% of the total.
The changes occurred in the absence of new clinical evidence or guideline updates, demonstrating how high-profile political messaging can quickly shift medical practices despite a lack of scientific support.
Tylenol use had returned to normal by December, but leucovorin prescriptions remained high.
Medical experts warn that such unverified claims can jeopardize evidence-based care and public confidence in science.
Una afirmación de la Casa Blanca de 2025 que vinculaba el acetaminofén con el autismo causó una fuerte caída en su uso durante el embarazo y un aumento en las recetas de leucovorina para niños autistas, a pesar de no haber nuevas pruebas.