Sept. 29 (UPI) -- Acetaminophen is widely taken during pregnancy, but a new study warns women that it may be linked to sleep and attention problems in children. They were discovered in kids at age 3. It's the latest research finding that the offspring of pregnant women who have taken the pain reliever -- also called paracetamol, but best known under the brand name Tylenol -- developed "neurobehavioral" problems.