Eli Lilly’s (NYSE:LLY) experimental drug helped patients lose up to 24% of their weight after almost a year, the highest reduction seen in the obesity treatment space to date, according to new mid-stage clinical trial results released Monday.
The phase two trial followed 338 adults who were obese or overweight and either received the pharmaceutical company’s injection, retatrutide, or a placebo each week.
Patients who took a 12-milligram dose of retatrutide lost 17.5% of their body weight, or 41 pounds, on average after 24 weeks, compared with 1.6% for those who received the placebo.
Patients lost 24.2%, or 58 pounds, on average after 48 weeks. Those who took the placebo lost 2.1% of their body weight after that same time period.
The trial’s researchers said average weight loss did not appear to plateau after 48 weeks, suggesting a longer study could show even more. Eli Lilly is currently recruiting patients for a phase three trial.
That data suggests Eli Lilly’s retatrutide is the “most effective anti-obesity med to date,” Michael Weintraub, an endocrinologist at NYU Langone Health, said in a Twitter post.
Eli Lilly’s other obesity drug Mounjaro, which is approved for type 2 diabetes, has helped patients lose up to 21% of their weight in clinical trials.
Novo Nordisk’s Wegovy, cleared for weight loss, has shown up to 15% weight loss in trials.
LLY shares rocketed $7.21, or 1.6%, to $459.97.
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