CNN —

An oral version of semaglutide, the active ingredient in blockbuster drugs Ozempic and Wegovy, failed to slow the progression of Alzheimer's disease in closely watched trials, Novo Nordisk said Monday.

In two Phase 3 trials of more than 3,800 adults receiving standard care for Alzheimer's, the company evaluated whether an older pill form of semaglutide worked better than a placebo. The drug was shown to be safe and led to improvements in Alzheimer's-related biomarkers, the company said , but the treatment did not delay disease progression.

Novo had long treated Alzheimer's as a long-shot bet for the popular GLP-1 drugs. Use of these drugs for diabetes and weight loss has exploded in recent years, and they have shown benefits for a wide range of additional health conditions, such

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