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US judge won’t block Eli Lilly ads for weight-loss drugs, rules against Novo Nordisk

By Thomson Reuters Oct 26, 2026 | 3:08 PM

By Jonathan Stempel

Oct 26 (Reuters) – A US judge on Monday rejected Novo Nordisk’s request to block Eli Lilly from ​continuing weight-loss drug advertisements that the ‌Danish drugmaker considered false and misleading.

Novo Nordisk had requested a preliminary injunction to halt Eli Lilly’s advertising while the case proceeded.

US District Judge Zahid ‌Quraishi ​in Trenton, New Jersey ⁠rejected that request, calling ⁠Novo Nordisk’s claim of irreparable harm “inadequate to warrant the extraordinary relief it seeks.”

Weight-loss drugs have become major businesses for large ​pharmaceutical companies. The United States is one of only a handful of countries ⁠that allow direct-to-consumer advertising ⁠of prescription medicines.

Novo Nordisk sued ​Eli Lilly in July, saying ads for the obesity ​drug Zepbound and diabetes treatment Mounjaro ‌compared higher doses of those products with lower doses of Novo Nordisk’s Wegovy and Ozempic.

The ads claiming that Eli Lilly ⁠drugs were superior violated false advertising and unfair competition laws, justifying an injunction, Novo Nordisk said.

Eli Lilly has ⁠denied wrongdoing.

Novo ‌Nordisk is working to regain market ⁠share in the United States ​for ‌its injectable obesity drugs, a ​market projected ⁠to exceed $100 billion by the end of the decade.

Quraishi ruled following a hearing on August 27 and 28.

(Reporting by Jonathan Stempel in New York and Sneha S K ​in Bengaluru)