Lilly’s decision to offer vials has also been seen as its way to combat the rise in compounding. Patients have been turning to compounding pharmacies that make cheaper copies of Zepbound, since the branded treatment has been too costly and, up until recently, has been in shortage.

The results are an uncomfortable echo of late October 2024, when Mounjaro and Zepbound missed by similar margins. Those results unsettled investors, setting off a three-week sello

The updated guidance, which was largely driven by lower-than-anticipated sales of GLP-1 blockbusters Mounjaro and Zepbound, sent Eli Lilly’s shares cratering by as much as 8% Tuesday, even as the company forecasted robust 2025 revenue.