Lilly reports weight maintenance with Foundayo and reduced-dose Zepbound

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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

May 12, 2026 6:01 PM EDT

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

In ATTAIN-MAINTAIN and SURMOUNT-MAINTAIN, participants who switched from Zepbound MTD to Foundayo or reduced the dose of Zepbound to 5 mg, respectively, maintained all but 5.0 kg and 5.6 kg of their previous weight loss on average after one year

Participants in SURMOUNT-MAINTAIN who remained on Zepbound MTD for an additional year maintained all of their prior weight loss on... More