On Monday, September 22, then-President Donald Trump advised pregnant individuals to steer clear of acetaminophen, the active ingredient in Tylenol, citing a controversial study by a Harvard dean and other researchers. In swift response, a coalition of major health organizations — including the American College of Obstetricians and Gynecologists (ACOG), the Society of Obstetrics and Gynecology of Canada, the American Academy of Pediatrics (AAP), and the World Health Organization (WHO) — issued statements directly refuting Trump’s claim that Tylenol use during pregnancy “can be associated with an increased risk of autism.”

Following a recommendation from Donald Trump advising parents against administering Tylenol to babies, the American Academy of Pediatrics (AAP) promptly issued a statement. The AAP affirmed that decades of research have consistently found acetaminophen, Tylenol’s active ingredient, to be safe for children when given as recommended. The organization further cautioned that misleading claims linking the medicine to increased rates of autism transmit a confusing and dangerous message to both current and expectant parents.

The assertion that Tylenol causes autism has entered public discourse, particularly concerning acetaminophen use during pregnancy. This analysis will investigate the origins of this claim and critically evaluate the available scientific evidence, offering research-backed insights into frequently asked questions about the medication.