The Brief President Trump said Tylenol use during pregnancy is tied to autism – a claim pediatricians dispute. A Tampa mother whose son has autism said families deserve answers but warned against focusing only on one possible cause. Experts stress Tylenol is still considered the safest option for pain and fever during pregnancy. President Donald Trump, alongside Health Secretary Robert F. Kennedy Jr., announced on Monday that they believe acetaminophen — the active ingredient in Tylenol — is linked to higher autism rates when used during pregnancy. RELATED: Autism and Tylenol: Trump’s HHS claims link if acetaminophen taken during pregnancyThe other side:Many physicians quickly pushed back.