WASHINGTON – Health Secretary Robert F. Kennedy Jr. and other administration officials are vowing a crackdown on deceptive drug ads, but the effort is likely to face multiple headwinds, including pushback from industry and layoffs among regulators tasked with leading the effort.

President Donald Trump signed a memo Tuesday that directs the Food and Drug Administration and other agencies to step up enforcement against ubiquitous prescription drug ads on TV, websites and social media.

The industry’s multibillion-dollar marketing efforts have long been a target for Kennedy , who previously suggested banning all pharmaceutical ads from TV. That step would have almost certainly been struck down by federal judges, who have long accepted advertising as a First Amendment-protected form of s

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