Pregnant women are filming themselves taking Tylenol in defiance against Donald Trump's shaky claim the painkiller causes autism in children.

The president announced that doctors in the US will begin advising expectant mothers against taking the drug because of an apparent link.

Trump, 79, claimed that taking Tylenol 'is no good', adding that pregnant women should 'fight like hell' to avoid taking it, except for in cases of extreme fever.

Several moms have gone viral on TikTok for posting videos of themselves taking Tylenol in protest.

'Here's me, a PREGNANT woman, taking TYLENOL because I believe in science and not someone who has no medical background,' one mom called Grace wrote over a video of herself taking the pill and dancing.