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Novo Nordisk announced the headline results from the second phase 3a trial for semaglutide, SUSTAIN3. Semaglutide is a new GLP-1 analogue administered subcutaneously once weekly. The trial investigated the efficacy and safety of 1.0 mg semaglutide compared with 2.0 mg exenatide once-weekly after 56 weeks of treatment added on to 1-2 oral antidiabetic drugs in 813 people with type 2 diabetes.
The trial achieved its objective by demonstrating that from a mean baseline HbA1c of 8.4%, people treated with 1.0 mg semaglutide achieved a statistically significant and superior improvement in HbA1c of 1.5% compared to the improvement in HbA1c of 0.9% with 2.0 mg exenatide once-weekly.
66% of the people treated with 1.0 mg semaglutide achieved the American Diabetes Association (ADA) and the European Association for the Study of Diabetes (EASD) treatment target of HbA1c below 7% compared with 40% of the people treated with 2.0 mg exenatide once-weekly.
Furthermore, from a mean baseline body weight of 96 kg, people treated with 1.0 mg semaglutide experienced a statistically significant and superior weight loss of 5.6 kg compared with a weight loss of 1.8 kg for people treated with 2.0 mg exenatide once-weekly.
In the trial, semaglutide appeared to have a safe and well-tolerated profile. The most common adverse event was nausea which diminished over time. Nausea was reported by 22% of people treated with 1.0 mg semaglutide once-weekly compared with 11% of people treated with 2.0 mg exenatide once-weekly. The discontinuation rate due to all adverse events for 1.0 mg semaglutide was 9.4% compared to 7.2% for 2.0 mg exenatide.
"We are excited about these trial results, which show that 1.0 mg semaglutide injected once weekly provided better glycaemic control and greater weight loss than 2.0 mg exenatide once-weekly," says Mads Krogsgaard Thomsen, executive vice president and chief science officer of Novo Nordisk. "These results support that semaglutide has the potential to become the most efficacious GLP-1 product for people with type 2 diabetes. We look forward to further results from the SUSTAIN clinical development programme."
Novo Nordisk expects to announce headline results of the four remaining SUSTAIN trials within the next coming quarters.
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