BMJ July 2026 Comparative effects of drugs for adults with overweight or obesity

This comprehensive meta-analysis evaluates the comparative effectiveness and safetyof nearly twenty modern weight-loss medications to guide clinical and policy-driven decision-making. The research highlights that while advanced treatments like tirzepatide and semaglutide facilitate the most significant reductions in body mass, these benefits often come at the cost of increased gastrointestinal side effects and higher rates of treatment discontinuation. Beyond simple weight metrics, the study uniquely examines broader health outcomes, finding that subcutaneous semaglutidestands alone in its proven ability to lower mortality and major cardiovascular risks. Ultimately, the findings suggest that patients and providers must balance substantial weight loss against potential harms, noting that most drugs currently fail to provide a clinically meaningful boost to a patient's overall quality of life.