Novo Nordisk: Wegovy® Reduces Heart Attack, Stroke, Death Risk by 57% vs. Tirzepatide

Key highlights
  • Wegovy® (semaglutide) 2.4 mg reduces heart attack, stroke, or death risk by 57% compared to tirzepatide in obese patients with CVD.
  • The study recorded 15 cardiovascular events with Wegovy® and 39 with tirzepatide over an average follow-up of 3.8 and 4.3 months, respectively.
  • Wegovy® showed a 29% risk reduction in heart events compared to tirzepatide in all treated people, regardless of treatment gaps.
  • The findings suggest semaglutide's cardiovascular benefits are specific and not general to GLP-1 or GIP/GLP-1 classes.

Study Overview

Novo Nordisk's STEER real-world study, presented at the European Society of Cardiology Congress 2025, compared the effects of Wegovy® (semaglutide) 2.4 mg and tirzepatide on cardiovascular events in people with obesity and cardiovascular disease (CVD) without diabetes.

Key Findings

Wegovy® demonstrated a 57% greater reduction in the risk of heart attack, stroke, or death from any cause compared to tirzepatide in patients with obesity and CVD, with no treatment gaps exceeding 30 days. The study recorded 15 cardiovascular events with Wegovy® and 39 with tirzepatide, over an average follow-up of 3.8 months for Wegovy® and 4.3 months for tirzepatide.

Additional Insights

In all treated individuals, regardless of treatment gaps, Wegovy® showed a 29% risk reduction for heart attack, stroke, and death from any cause compared to tirzepatide. There were 56 cardiovascular events recorded with Wegovy® and 83 with tirzepatide, over an average follow-up of 8.3 months for Wegovy® and 8.6 months for tirzepatide.

Conclusion

The study suggests that the cardiovascular benefits observed with Wegovy® are specific to the semaglutide molecule and cannot be generalized to the broader GLP-1 or GIP/GLP-1-receptor agonist classes.

Source: Novo Nordisk

chemXplore Weekly

The week’s project milestones and project news from the chemical industry, free every Wednesday.

Free. One email a week. Unsubscribe any time.

Related articles

21 September 2026
Novo Nordisk: CagriSema outperforms tirzepatide 5 mg for weight loss

CagriSema 1.0/1.0 delivered greater weight loss than tirzepatide 5 mg and 21% vs 2% vs placebo in obesity trial; HbA1c reduction was non‑inferior. FDA decision expected Q4 2026.

6 June 2026
Novo Nordisk: semaglutide 2 mg escalation matches tirzepatide for HbA1c <7% and yields greater ≥5% weight loss

Real‑world claims analysis found semaglutide 2 mg escalation gave similar HbA1c <7% rates and higher ≥5% weight‑loss rates than switching to titratable tirzepatide.

23 February 2026
Novo Nordisk: CagriSema Shows 23% Weight Loss in Trial, Misses Primary Endpoint

CagriSema achieved 23% weight loss in 84 weeks but didn't match tirzepatide. Further trials will explore higher doses. Safe profile with mild gastrointestinal effects.

15 September 2026
Eli Lilly presents retatrutide, Foundayo and eloraTZP data at EASD 2026

Phase 3 retatrutide and Foundayo results show large weight and A1C reductions and signals of cardiovascular benefit; Phase 2 eloraTZP and additional Mounjaro/Zepbound analyses also presented.

8 June 2026
Lilly's Foundayo (orforglipron) outperforms oral semaglutide, dapagliflozin and placebo in ACHIEVE trials

Oral GLP‑1 orforglipron reduced A1C and body weight more than oral semaglutide, dapagliflozin or placebo across three Phase‑3 trials; FDA filing planned by end of Q2 2026.