Preliminary Real-World Experience with Semaglutide in Obese Patients with Type 2 Diabetes on Chronic Hemodialysis: A Multicenter Pilot Study

<i>Background and Objectives:</i> Semaglutide is a glucagon-like peptide-1 receptor agonist (GLP-1RA) that has demonstrated metabolic and weight benefits in diabetic and obese patients with chronic kidney disease (CKD) who are not on dialysis; however, evidence in the hemodialysis (HD) population is scarce. Weight control and body composition optimization are particularly challenging in HD because of fluid shifts and the risk of protein-energy wasting. <i>Materials and Methods:</i> This prospective, multicenter, real-world, uncontrolled observational pilot study explored the short-term safety and changes in anthropometric and body-composition parameters after semaglutide initiation in obese adults with type 2 diabetes mellitus (T2DM) undergoing chronic HD. Patients were assessed at baseline and at 3 and 6 months. The primary endpoint was the change in body mass index (BMI), dry weight, and fat mass assessed by bioimpedance spectroscopy (BIS). <i>Results:</i> Thirteen patients were included (10 male, 77%), with a median age of 61.9 years (IQR 55-69). Semaglutide was started at 0.25 mg/week and titrated up to 1 mg/week according to tolerance. Three patients (23.1%) experienced transient nausea that was resolved over time or after dose adjustment, without discontinuation. From baseline to month +6, BMI decreased by a median of 1.5 kg/m² and dry weight by 5.0 kg, mainly driven by a median reduction in fat mass of 9 kg; lean tissue mass and serum albumin did not change significantly. <i>Conclusions:</i> In this small, uncontrolled exploratory study, semaglutide was generally well tolerated and was associated with short-term reductions in body weight and fat mass in obese patients with T2DM on HD. These findings are hypothesis-generating and require confirmation in larger controlled prospective studies to define safety and clinical benefit in this population.