PLoS ONE 6 , e16144 (2011)

Liraglutide (Saxenda): What It Is: GLP-1 receptor agonist (same class as semaglutide) Older, less effective version Daily injection required Effectiveness: Average Weight Loss: 5-8% of body weight SCALE Trial: 8% loss vs 2.6% placebo Significantly less effective than semaglutide (daily) or tirzepatide Why Less Effective: Shorter half-life requires daily dosing Less consistent drug levels Lower peak concentrations Side Effects: Similar to semaglutide (nausea, diarrhea, constipation) Same GLP-1 class warnings Cost: $1,400/month More expensive than newer, more effective options Who Should Consider: Almost no one Semaglutide and tirzepatide have largely replaced liraglutide Rarely prescribed for weight loss anymore Comparison Table: All FDA-Approved Weight Loss Medications: Bottom Line on Non-GLP-1 Options: For most patients seeking effective weight loss: Best Results: Tirzepatide or semaglutide If GLP-1s Contraindicated: Phentermine-topiramate Avoid: Orlistat, naltrexone-bupropion (poor effectiveness) Short-term Only: Phentermine The GLP-1 revolution has made older medications largely obsolete for patients who can tolerate them

Signs You Should See a Weight Loss Doctor If youre unsure whether your weight struggles are related to thyroid issues, consider these signs: Unexplained weight gain Persistent fatigue Difficulty losing weight despite diet and exercise Sensitivity to cold Hair thinning or dry skin These symptoms often point to hormonal imbalances that require medical evaluation
Drugmakers themselves believe that demand for weight loss solutions will continue to outpace the supply of branded medications
Companies might need to rethink recipes, prices, or packaging to keep customers