Safety and efficacy of glucagon-like peptide-1 (GLP-1) receptor agonists in patients with weight regain or insufficient weight loss after metabolic bariatric surgery: A systematic review and meta-analysis.

INTRODUCTION: Weight regain and insufficient weight loss are major challenges after metabolic bariatric surgery (MBS), affecting patients' comorbidities and quality of life. The current systematic review and meta-analysis aim to assess the efficacy and safety of GLP-1 receptor agonists (GLP-1 RA) in patients with weight regain or insufficient weight loss after MBS. METHODS: A systematic search was conducted across PubMed, Embase, Scopus, and Web of Science databases to find the relevant studies. RESULTS: A total of 19 articles were included. The highest doses of liraglutide and semaglutide were 3 mg per day and 1 mg once weekly, respectively, in the included studies. The mean differences in weight and body mass index after treatment were -7.02 kg or 3.07 kg/m, -8.65 or -5.22 kg/m, and -6.99 kg or -3.09 kg/m for treatment durations of ≤ 6 months, 6-12 months, and >12 months with liraglutide, respectively. Additionally, weekly semaglutide showed significantly greater weight loss compared to daily liraglutide, with a mean difference of 4.15 kg. Common complications included nausea (19.1%), constipation (8.6%), abdominal pain (3.7%), and vomiting (2.4%). CONCLUSION: Using GLP-1 RA is a safe and effective treatment for weight regain and insufficient weight loss after MBS.