For the first time, federal health officials are taking aim at promoting unofficial versions of prescription drugs — including popular weight loss medications — as part of the on pharmaceutical advertising.

The Food and Drug Administration on Tuesday posted more than 100 letters to various drug and online prescribing companies, including , which has built a multibillion-dollar business centered around lower-cost versions of blockbuster .

The FDA warned the company to remove “false and misleading” promotional statements from its website, including language claiming that its customized products contain “the same active ingredient” as FDA-approved drugs Wegovy and Ozempic. The formulations cited by regulators are produced by specialty compounding pharmacies and aren’t reviewed by the

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