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Popular weight-loss drugs face numerous lawsuits over rare ‘eye stroke’ linked to vision loss

Plaintiffs allege the companies failed to warn that the drugs may cause NAION, a rare eye condition that can lead to blindness.

  • Thousands of lawsuits, including at least 4,000 consolidated complaints, target Eli Lilly and Novo Nordisk, alleging the drugmakers failed to warn patients of NAION, an "eye stroke" causing permanent vision loss linked to popular GLP-1 medications.
  • NAION, often called an "eye stroke," is a rare condition causing sudden vision loss; while some studies suggest an association with GLP-1s, researchers have not established a definitive cause-and-effect relationship, and the disorder is more common in people over 50.
  • Novo Nordisk updated European labels to note a risk of 1 in 10,000 patients, but the FDA maintains no such requirement in the U.S., while both Novo Nordisk and Eli Lilly deny any significant relationship between their drugs and NAION.
  • Complaining parties allege that Eli and Novo "failed to communicate" increased risks, with one Pennsylvania lawsuit claiming defendants concealed risks to create the impression these medications were "magic pills" to help a person lose weight.
  • Litigation continues as patients seek damages for complications including gastrointestinal injury; current research remains mixed, as a 2024 study of nearly 17,000 people failed to establish causation, leaving medical consensus on drug safety uncertain.
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USA Today broke the news in New York, United States on Monday, September 21, 2026.
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