Improved Glycemic Control with Insulin Glargine 300 U/mL (Toujeo®) in Patients with Type 2 Diabetes: Real-World Effectiveness in Switzerland

Introduction Insulin glargine 300 U/mL (Gla-300, Toujeo ® ) is a long-acting, once-daily basal insulin with improved—more stable and smoother—pharmacokinetic and pharmacodynamic profiles compared to insulin glargine 100 U/mL (Gla-100) and insulin degludec (IDeg). These properties have been shown to translate into an effective HbA1c reduction with the advantage of a lower risk of hypoglycemia in randomized controlled trials of Gla-300 versus Gla-100. In this study, we assessed the effectiveness and safety of Gla-300 under real-world conditions in Switzerland. Methods The prospective, observational, open-label, multicenter study TOP-2 explored the effectiveness of Gla-300 in adult patients with type 2 diabetes (T2D) uncontrolled (HbA1c 7.5–10%) on their previous basal insulin in Germany, Austria, and Switzerland. The primary endpoints were the percentages of patients achieving a fasting plasma glucose (FPG) of ≤ 6.1 mmol/L after 6 and 12 months. Secondary endpoints included changes in HbA1c, FPG, body weight, and insulin dose as well as hypoglycemia incidence and safety. Here we report the results for the Swiss patient cohort after 12 months of treatment with insulin glargine 300 U/mL. Results The 62 patients (33 men) had a mean age of 65 years, a mean diabetes duration of 14 years, a mean body mass index (BMI) of 31 kg/m 2 , and were mainly switched from Gla-100 (44%) to Gla-300. The most common concomitant oral anti-diabetes therapy was metformin (65%). The mean individual HbA1c target chosen by the investigators was 7.4%. After 12 months of therapy, Gla-300 significantly reduced mean HbA1c from 8.2% to 7.6% ( p