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A surge in demand for leucovorin, fueled by unfounded FDA approval rumors, caused shortages and risks despite lack of proven autism benefits.
Interest in leucovorin, a chemotherapy drug, surged among parents of autistic children after federal officials in late 2025 suggested the FDA would soon approve it for autism, leading to widespread off-label use, a national shortage, and temporary imports from Canada and Spain.
Experts, including Dr. Paul Offit, caution that the drug’s popularity exceeds scientific evidence, noting it may only help a small subset with cerebral folate deficiency—a rare condition distinct from autism—based on limited early studies.
Major medical groups have not endorsed its use, warning against unproven treatments and potential risks.
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Un aumento en la demanda de leucovorina, alimentada por rumores infundados de aprobación de la FDA, causó escasez y riesgos a pesar de la falta de beneficios probados para el autismo.