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Eli Lilly's Foundayo, Lower-Dose Zepbound Help Sustain Weight Loss - Eli Lilly (NYSE:LLY)

Lilly said the lower-dose regimens preserved prior weight-loss results in late-stage trials, with 221 participants in the study.

  • On Tuesday, May 12, 2026, Eli Lilly announced detailed results from two late-phase clinical trials showing patients with obesity maintained weight loss long-term after switching to either daily oral Foundayo or lower-dose Zepbound.
  • Obesity is a chronic disease requiring long-term treatment, and these trials addressed the persistent challenge of weight regain for patients who have previously achieved weight loss.
  • Both Zepbound and Foundayo demonstrated safety profiles consistent with prior clinical data, providing patients with multiple treatment options to manage weight maintenance after the initial reduction period.
  • Participants in both studies successfully maintained their prior weight loss, as continuing treatment with these medications helps prevent the weight regain often associated with stopping therapy.
  • These findings offer a potential strategy for long-term health management, giving clinicians evidence that transitioning to maintenance doses can sustain results for those managing chronic obesity.
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The Conway Daily SunThe Conway Daily Sun
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Lilly's Foundayo and lower-dose Zepbound helped people maintain weight loss after switching from higher doses of injectable incretin therapy in two late-phase trials

In ATTAIN-MAINTAIN, participants who transitioned from a maximum tolerated dose (MTD) of Wegovy (semaglutide) to Foundayo maintained all but 0.9 kg of their previously achieved weight loss on average after one year

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PR Newswire broke the news in United States on Tuesday, May 12, 2026.
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