The preponderance of evidence shows that this is not the case,” he wrote Monday on X. “The concern is that women will be left with no options to manage pain in pregnancy. Experts say there are multiple causes of autism, and the science showing a connection between autism and Tylenol is not settled. In February, Cassidy cast a deciding vote to confirm Kennedy to lead HHS. He has been careful to not directly criticize the president or Kennedy, despite expressing concern at some CDC and HHS actions.