In the meantime, the president is calling on pregnant women to avoid taking Tylenol, believing the pain medicine could contribute to the neurodevelopmental disorder. Johnson wants to know more about why President Trump encourages pregnant women to avoid Tylenol. Acetaminophen is the safest pain reliever option for pregnant women as needed throughout their entire pregnancy. The fact is that over a decade of rigorous research, endorsed by leading medical professionals and global health regulators, confirms there is no credible evidence linking acetaminophen to autism. We stand with the many public health and medical professionals who have reviewed this science and agree.