RCT | Oral Semaglutide at 25mg and 50mg improves glycemic control in overweight T2DM patients compared to standard 14mg dose

Summary: The study was a global, multicenter, randomized, double-blind, phase 3b trial involving 1606 adults with inadequately controlled type 2 diabetes. The mean HbA1c in the study population was 9.0% and the mean BMI was 33.8 kg/m2. Participants were assigned to receive either 14mg, 25mg, or 50mg of once-daily oral semaglutide for 68 weeks. The trial aimed to investigate the effectiveness of a new formulation of semaglutide at higher investigational doses against the standard 14mg dose.

The primary endpoint was the change in glycated hemoglobin (HbA1c) levels from baseline to week 52. Results showed that at week 52, changes in HbA1c levels were significantly more substantial with the 25mg (-1.8 percentage points) and 50mg (-2.0 percentage points) doses compared to the 14mg dose (-1.5 percentage points). During the trial, ten deaths occurred, but none were considered treatment-related. No new safety concerns were identified, though adverse events, primarily mild to moderate gastrointestinal disorders, were slightly more frequent in the 25mg and 50mg groups.

The study limitations include a relatively short exposure to the higher doses due to the up to 16 weeks of dose-escalation period, non-adjustable doses due to masking requirements, and a cohort predominantly of White ethnicity, considering the high prevalence of type 2 diabetes in other racial groups. The study was unable to assess differences in efficacy and tolerability between the 25mg and 50mg doses, raising the question of whether the 50mg dosage is necessary if similar effects can be achieved with the 25mg dose.

The implications for further research highlight the need for real-world studies to investigate the clinical impact and safety of these higher doses of oral semaglutide. The superior glycemic control and bodyweight loss with oral semaglutide 25mg and 50mg suggest that these higher doses might help individualize treatment goals and intensify treatment by increasing the dose of a single oral agent. Future studies could consider comparing the 25mg and 50mg doses more directly to determine the most effective and tolerable dose for patients.

Article: Efficacy and safety of once-daily oral semaglutide 25 mg and 50 mg compared with 14 mg in adults with type 2 diabetes (PIONEER PLUS): a multicentre, randomised, phase 3b trial – The Lancet (free registration required)