Recent news may be raising questions about autism, acetaminophen and vitamin B. Experts in autism, pregnancy and pediatrics have all issued guidance through their professional organizations. Nationwide Children's experts are sharing this Acetaminophen (Tylenol) Use in Pregnancy: Autism Concerns Tylenol Autism Lawsuit [2026 Update] See If You Qualify The headline Tylenol causes autism has sparked concern. But the science tells a more nuanced story. Some observational studies have found that when pregnant women used more acetaminophen, their Mark Hyman, Tylenol (acetaminophen) does not cause autism. The FDA, in its statement that there may be an association, confirmed that "a causal relationship has not been established, and studies of millions of children