Shares of Novo Nordisk and Eli Lilly extended declines after Mass Eye and Ear, a Harvard-affiliated hospital, revealed in a new study published in the journal JAMA Ophthalmology that people prescribed semaglutide, sold as Ozempic and Wegovy (Novo), have an elevated risk of developing a "potentially blinding eye condition" called nonarteritic anterior ischemic optic neuropathy (NAION).
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