Weight maintenance on cost-effective antiobesity medications after 1 year of GLP-1 receptor agonist therapy: a real-world study.

OBJECTIVE: The high cost of novel glucagon-like peptide-1 receptor agonist (GLP-1 RA) class agents often limits access and creates barriers to care. This real-world study evaluated the efficacy of older-generation generic antiobesity medications (AOMs) for weight maintenance after 1 year of GLP-1 RA therapy in patients who had achieved successful weight loss. METHODS: We prospectively followed patients (N = 105) who had completed 12 months of therapy and were part of a "medical weight loss bundle," which included 12 months of GLP-1 RA therapy followed by 6 months of transition care. The baseline mean BMI was 36.4 kg/m. Body weight outcomes were measured at 6, 12, 18, and 24 months. RESULTS: After the medical weight loss bundle, 40 patients transitioned to generic AOMs. At 12 months, this cohort lost an average of 18.3%, 95% CI [13.0%, 23.6%] body weight from baseline, with a mean BMI of 27.9 kg/m. At 18 months, they maintained the weight loss, with a mean BMI of 27.9 kg/m. Subsequent follow-up visits (average 1.5 months later) without GLP-1 RAs showed further reduction, resulting in a total average weight loss of 25.5%, 95% CI [23.1%, 27.9%] compared to the initial visit. CONCLUSIONS: Patients successfully treated with GLP-1 RAs can maintain their weight loss using generic older-generation AOMs, suggesting potential cost savings for insurers and implications for policy regarding AOM coverage.