Lilly Plans NDA for Oral Weight-Loss Drug

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Eli Lilly plans to file an NDA by the end of the year for its investigational obesity treatment orforglipron, an oral glucagon-like peptide-1 (GLP-1) receptor agonist, based on just-announced Phase 3 data showing the drug demonstrated significant weight loss. The ATTAIN-1 study enrolled 3,127 adults with obesity or who were overweight and at least one weight-related medical condition (except diabetes), according to the company. Over 72 weeks, all three orforglipron tested doses met the primary and all key secondary endpoints, delivering meaningful weight loss compared to placebo, it says.

Participants receiving the highest dose of orforglipron (36 mg) lost an average of 12.4% of their body weight (27.3 lbs), compared to 0.9% (2.2 lbs) in the placebo group, Lilly says. The highest also yielded improvements in cardiovascular risk markers, including reductions in triglycerides, non-HDL cholesterol, systolic blood pressure, and high-sensitivity C-reactive protein, which dropped by nearly 48%.

The safety profile of orforglipron was consistent with other GLP-1 receptor agonists, according to the company. Gastrointestinal issues were the most common side effects, including nausea (up to 36%), constipation, diarrhea, vomiting, and indigestion. Most cases were mild to moderate. Treatment discontinuation due to side effects ranged from 5.1% to 10.3% depending on the dose, compared to 2.6% with placebo. No liver safety concerns were reported.

Lilly plans to present detailed data from ATTAIN-1 at the European Association for the Study of Diabetes annual meeting in September and publish the findings in a peer-reviewed journal. Additional results from the broader ATTAIN program, as well as from the ACHIEVE program for people with Type 2 diabetes, are expected later this year.

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