Hormonal
GLP-1 receptor agonists (GLP-1RAs) including semaglutide 2.4 mg and tirzepatide induce significant weight loss (12-20%) and improve metabolic comorbidities, but discontinuation of therapy leads to rapid weight regain, indicating that obesity treatment with these agents requires long-term or lifelong administration.
GLP-1 medications like semaglutide (2.4 mg weekly) and tirzepatide are highly effective for weight loss, achieving 12-20% body weight reduction in clinical trials. However, these drugs treat obesity as a chronic condition; stopping treatment typically leads to rapid weight regain. Therefore, successful long-term management likely requires continuous, lifelong therapy. Side effects like nausea are common but manageable through slow dose escalation. Oral versions are emerging to address injection aversion.
Semaglutide 2.4 mg once weekly improved weight loss to about 12–15%, while the dual GIP/GLP-1 receptor agonist tirzepatide once weekly has induced a weight loss of about 20% in obese people without diabetes... During this period [52 weeks without treatment], there was a weight gain of + 11.6% and + 1.9%, respectively... Outstanding question is maintenance of the weight loss, possibly pharmacological treatment needs to be life-long.
Why this rating
Based on multiple Phase 3 randomized controlled trials (SCALE, STEP series) with large sample sizes.
Source
The promise of glucagon-like peptide 1 receptor agonists (GLP-1RA) for the treatment of obesity: a look at phase 2 and 3 pipelines
Sten Madsbad et al. · Expert Opinion on Investigational Drugs · 2025
DOI 10.1080/13543784.2025.2472408
Related findings · Hormonal
- Initial treatment for type 2 diabetes should be a combination of metformin and either an SGLT-2 inhibitor or a GLP-1 receptor agonist to achieve cardiorenal protection, rather than monotherapy or older agents like sulfonylureas.Strong
- For patients with specific monogenic obesity syndromes (leptin deficiency, POMC/PCSK1/LEPR mutations), targeted pharmacotherapy (recombinant leptin or setmelanotide) is highly effective and should be prioritized, unlike in polygenic obesity.Strong
- Continued weekly administration of 2.4 mg subcutaneous semaglutide prevents weight regain and promotes further weight loss in adults with overweight or obesity, whereas switching to placebo results in significant weight regain.Strong
This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →