How much weight can one expect to lose when taking a weight-loss drug?

    Last Updated: October 13, 2024

    Large-scale clinical trials have reported that 68 weeks of semaglutide (2.4 mg as a once-weekly injection) reduced body weight by 9.6%–17.4% (up to 12.5 kg or 27.5 lb) in adults with a BMI ≥30 or a BMI ≥27 and at least 1 weight-related comorbidity.[1] Semaglutide appears to reduce weight to a larger degree compared to other anti-obesity medications (i.e., orlistat, naltrexone-bupropion, phentermine-topiramate, liraglutide), for which weight loss in the range of 2.6–8.8 kg (5.7–19.4 lb) has been reported.[2] Semaglutide appears to be less effective than terzepatide, with a 9.2 kg/20.2 lb greater weight loss reported with once-weekly terzepatide vs. once-weekly or daily semaglutide.[3]

    In addition to their effect on weight, semaglutide and other GLP-1 agonists may also improve cardiovascular disease risk factors including waist circumference, systolic and diastolic blood pressure, HbA1c, fasting blood glucose, cholesterol, triglycerides, and inflammatory markers like C-reactive protein (CRP).[1] Many of these effects are likely due to weight and/or fat loss, however.

    References

    1. ^Chao AM, Tronieri JS, Amaro A, Wadden TASemaglutide for the treatment of obesity.Trends Cardiovasc Med.(2023-Apr)
    2. ^Khera R, Murad MH, Chandar AK, Dulai PS, Wang Z, Prokop LJ, Loomba R, Camilleri M, Singh SAssociation of Pharmacological Treatments for Obesity With Weight Loss and Adverse Events: A Systematic Review and Meta-analysisJAMA.(2016 Jun 14)
    3. ^Alkhezi OS, Alahmed AA, Alfayez OM, Alzuman OA, Almutairi AR, Almohammed OAComparative effectiveness of glucagon-like peptide-1 receptor agonists for the management of obesity in adults without diabetes: A network meta-analysis of randomized clinical trials.Obes Rev.(2023-Mar)