The Science Behind Tylenol Use During Pregnancy Causing Autism Studies show children with autism have significantly lower levels of glutathione, the body's master antioxidant. Without enough glutathione, the body struggles to eliminate toxins, making it harder to cope with everyday Acetaminophen (Tylenol) Use in Pregnancy: Autism Concerns Tylenol (acetaminophen) does not cause autism. The FDA, in its statement that there may be an association, confirmed that "a causal relationship has not been established, and studies of millions of children Autism and Tylenol: Exploring the Evidence on Acetaminophen in Pregnancy NAM HHS responds to report about autism and acetaminophen : Shots Health News : NPR