Why the science is so wishy-washy on Tylenol, pregnancy and autism

The most common over-the-counter pain medication used during pregnancy may be linked to autism spectrum disorder and attention-deficit/hyperactivity disorders, or ADHD, in children, according to a new study. The study contributes to a growing body of evidence that has sparked controversy in the scientific community.

Acetaminophen, often sold under the brand name Tylenol, has long been considered the safest option for managing headaches, fever and other pain during pregnancy. The American College of Obstetricians and Gynecologists only recommends taking nonsteroidal anti-inflammatory drugs (NSAIDs), like Advil, in limited uses during the second trimester, if acetaminophen and other methods don't work. However, NSAIDs are generally to be avoided during pregnancy except in extremely specific use, and always with physician oversight, according to ACOG.