Mark Ritson is a former marketing professor, brand consultant and an award-winning columnist. He is also the founder of the MiniMBA in Marketing, a ten-week training program for senior managers who missed or have forgotten their marketing fundamentals. Sign up here .

President Trump has just given Kenvue, the maker of Tylenol, an almighty headache. Citing an unsubstantiated link to autism, the President made global headlines Monday by discouraging pregnant women from using the drug. Describing the situation as a “horrible, horrible crisis” and Tylenol as “not good,” Trump outlined plans to limit the drug’s future indications.

Medical experts and global health authorities have roundly rejected the claim, insisting that acetaminophen—the generic name for Tylenol—remains a s

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