Using acetaminophen during pregnancy may increase children’s autism and ADHD risk
FDA memo to physicians Notice to Physicians on the Use of Acetaminophen During Pregnancy
Tylenol is a brand name for the drug acetaminophen, which is the last of a class of drugs still on the market that were derived from coal tar. It was put on the market when it's predecessor, phenacetin, was taken off the market due to being highly carcinogenic. The other drug from the class, acetanilide, was withdrawn from the market because it was found to be hepatotoxic (toxic to the liver) and caused methamaglobinemia (blocking the ability of hemoglobin to carry oxygen).