Obesity

Benefits and Harms of Pharmacologic Treatments in Adults With Overweight or Obesity: A Living Systematic Review and Network Meta-analysis for the American College of Physicians

Ann Intern MedPublished Living systematic review and network meta-analysis of randomised controlled trials

Authors' conclusion

Nearly all studied interventions were more effective than placebo and/or LI in reducing weight. Semaglutide and tirzepatide showed the most favorable results across outcomes.

Study context

Population
Adults with overweight or obesity (BMI ≥25 kg/m²); RCTs from MEDLINE and Cochrane Central until October 2025
Participants
112,511 adults69 studies
Comparison
Pharmacologic weight-management treatments vs placebo and/or LI
Outcome
Weight reduction
Methodological detailspairwise and network meta-analyses, 37 studies at low risk of bias, Direct head-to-head comparisons of different treatments were limited
  • Pairwise and network meta-analyses
  • 37 studies at low risk of bias
  • Direct head-to-head comparisons of different treatments were limited

Pooled result

As reported in the abstract

  • Nearly all studied interventions were more effective than placebo and/or LI in reducing weight
  • Semaglutide and tirzepatide led to the greatest weight loss vs placebo and/or LI in pairwise and network meta-analyses

Further pooled results

Semaglutide probably reduced mortality and MACE; evidence for mortality and MACE was limited

Safety

More discontinuations due to adverse events were observed with the interventions
Evidence for serious adverse events was limited

Original publication

Benefits and Harms of Pharmacologic Treatments in Adults With Overweight or Obesity: A Living Systematic Review and Network Meta-analysis for the American College of Physicians. Ann Intern Med. Published 16 June 2026. doi:10.7326/annals-24-03764

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