Eli Lilly reported promising results from a study of its experimental oral drug that could rival popular injections to treat obesity and diabetes.

But this one, for Lilly’s first diabetes and weight-loss pill based on the GLP-1 hormone, was particularly fraught. Days before, rival pharma giant Pfizer had announced it was abandoning its oral weight-loss drug after worrying side effects involving liver problems were reported in one participant in the trial.

Eli Lilly's experimental pill worked as well as blockbuster drug Ozempic to lower weight and blood sugar in a trial of diabetes patients, and the company said it expects to seek regulatory approvals by the end of the year.