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Lilly’s Oral GLP-1 Pill Underperforms Wegovy in Late-Stage Trial

Lilly’s pill underperformance prompted investor sell-off, triggering price cuts plus lawsuits by Novo Nordisk to protect its GLP-1 market lead.

Image
Eli Lilly Biotechnology Center is shown in San Diego, California, U.S. March 1, 2023. REUTERS/Mike Blake/File Photo
A view shows a Novo Nordisk sign outside their office in Bagsvaerd, on the outskirts of Copenhagen, Denmark, July 14, 2025. REUTERS/Tom Little/ File Photo
Vials of Eli Lilly's Mounjaro, a tirzepatide injection drug used for treating type 2 diabetes and weight loss, are seen in a fridge at a health clinic in Hyderabad, India, April 14, 2025. REUTERS/Almaas Masood/ File Photo

Overview

  • Lilly’s experimental pill orforglipron helped patients lose an average of 12.4% of their body weight over 72 weeks, falling short of Wegovy’s roughly 15% reduction in its pivotal trial.
  • Gastrointestinal side effects were common, with 33.7% of high-dose patients reporting nausea, 24% vomiting and just over 10% discontinuing due to adverse events.
  • Shares of Eli Lilly plunged up to 14% in premarket trading as investors reacted to the pill’s lower-than-expected efficacy and tolerability.
  • Novo Nordisk announced multi-year price reductions for Wegovy and Ozempic, plus filed 14 lawsuits against compounding pharmacies selling unlicensed copies of its GLP-1 drugs.
  • The race for oral GLP-1 obesity therapies is accelerating, with both incumbents and new entrants scaling up filings and manufacturing ahead of a market forecast to exceed $150 billion by the early 2030s.