Harnessing GLP-1 Receptor Agonists for Obesity Treatment: Prospects and Obstacles on the Horizon.
This narrative review examines the current and emerging landscape of GLP-1 receptor agonists (GLP-1RAs) as treatments for obesity and related metabolic conditions. The authors survey the three FDA-approved agents for obesity—liraglutide, semaglutide, and tirzepatide—alongside off-label options, summarizing evidence for their efficacy in weight reduction and glycemic control. The review also discusses expanding indications, including potential benefits in neurodegenerative disorders, fatty liver disease, dyslipidemia, atherosclerosis, cardiovascular disease, chronic kidney disease, and heart failure. Emerging pipeline agents—such as CagriSema, orforglipron, mazdutide, retatrutide, and survodutide—are highlighted alongside innovations like ultralong-acting formulations, combination therapies, higher-dose oral delivery, and AI-integrated drug development. The authors note that generic liraglutide and evolving insurance coverage may reshape affordability and access. Key limitations acknowledged include adherence challenges, safety concerns, disparities in global access, and the need for long-term data on sustained weight loss and disease modification. As a narrative review, the paper synthesizes existing literature rather than generating new primary data, and conclusions are therefore subject to the quality and selection of included studies.
Why this grade: This is a narrative review synthesizing published literature on GLP-1RAs; it does not generate new primary human or experimental data, so evidence grading reflects the review design rather than direct trial evidence.
Background Obesity has emerged as a pressing global health challenge, and therapies based on glucagon-like Peptide 1 receptor agonists (GLP-1RAs) have transformed its management. Currently, liraglutide, semaglutide, and tirzepatide are FDA-approved for obesity treatment, while other agents are used off-label. These drugs not only provide unprecedented efficacy and acceptable safety in weight reduction and glycemic control for patients with obesity and Type 2 diabetes but also hold promise in broader indications, including neurodegenerative disorders, fatty liver disease, dyslipidemia, atherosclerosis, and cardiovascular conditions. Methods This narrative review examined the therapeutic applications of GLP-1RAs for obesity, emphasizing their efficacy, safety profile, challenges with patient adherence, and limitations. The review also explored emerging innovations such as ultralong-acting formulations, combination therapies, and the integration of digital health and artificial intelligence in advancing antiobesity drug development. Results GLP-1RAs represent a paradigm shift in the treatment of obesity and metabolic diseases, with rapidly expanding indications and global uptake. Recent evidence highlights improvements in tolerability, global accessibility, and the potential of novel technologies to optimize patient outcomes. By 2025, GLP-1RAs are anticipated to receive FDA approval for new indications, such as chronic kidney disease, heart failure with preserved ejection fraction, and metabolic dysfunction-associated steatohepatitis. Novel agents including CagriSema and higher dose oral semaglutide are advancing through clinical trials, while pivotal trial results for orforglipron, mazdutide, retatrutide, and survodutide are anticipated to further expand the therapeutic landscape. At the same time, the arrival of generic liraglutide and evolving insurance coverage are reshaping access and affordability. Conclusion The convergence of pharmacological innovation, digital health strategies, and equitable care initiatives is expected to revolutionize obesity therapeutics in the coming decade. Priorities for future research include sustaining long-term weight loss, establishing disease-modifying potential in nonmetabolic disorders, and addressing health equity concerns to ensure broader global benefit.
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