Hormonal
GLP-1 receptor agonists (liraglutide, semaglutide) and dual GIP/GLP-1 agonists (tirzepatide) produce significantly greater weight loss than older anti-obesity medications (orlistat, phentermine/topiramate, naltrexone/bupropion) by targeting hypothalamic appetite regulation and delaying gastric emptying.
If lifestyle changes alone haven't worked, newer GLP-1 medications (like semaglutide or tirzepatide) are significantly more effective than older drugs, achieving 15-20% weight loss compared to 3-5% with older options. However, they are expensive, require weekly injections (mostly), and can cause gastrointestinal side effects. They are best considered for those with obesity-related comorbidities who have failed lifestyle interventions.
These drugs have shown excellent weight-loss effects with tolerable adverse effects in phase II or III clinical trials, with significantly greater effectiveness than that of currently available medications.
Why this rating
Based on multiple Phase III randomized controlled trials (STEP, SURPASS, SCALE) cited in the text.
Source
Pharmacologic treatment of obesity
Han Na Jung et al. · Journal of Korean Medical Association · 2022
DOI 10.5124/jkma.2022.65.7.408
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
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