This episode explores public concerns about using Tylenol during pregnancy and examines the scientific evidence behind claims linking it to autism. Dr. Fox and economist Emily Oster break down why current studies are flawed, how sibling-comparison research offers clearer answers, and why existing high-quality data does not support Tylenol as a cause of autism. They also discuss the real-world consequences of misinformation, such as rising parental guilt, unnecessary fear, and the risks of avoiding needed treatment during pregnancy.