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. 2025 Sep 2;5(5):oeaf117.
doi: 10.1093/ehjopen/oeaf117. eCollection 2025 Sep.

Tirzepatide compared with semaglutide and 10-year cardiovascular disease risk reduction in obesity: post-hoc analysis of the SURMOUNT-5 trial

Affiliations

Tirzepatide compared with semaglutide and 10-year cardiovascular disease risk reduction in obesity: post-hoc analysis of the SURMOUNT-5 trial

Mamas A Mamas et al. Eur Heart J Open. .

Abstract

Aims: Approximately two-thirds of obesity-related mortality is attributable to cardiovascular disease (CVD). The aim of this analysis is to examine predicted CVD risk reduction following weight loss in persons with obesity for primary prevention between tirzepatide and semaglutide, and projected CVD events that could be potentially prevented in the USA.

Methods and results: SURMOUNT-5 was a Phase 3b, open-label, randomized trial conducted in participants with obesity and without Type-2 diabetes, comparing tirzepatide (10 or 15 mg) with semaglutide (1.7 or 2.4 mg) and administered via weekly subcutaneous injection. Predicted 10-year CVD risks were compared between treatments at baseline and up to 72 weeks post-treatment among participants without prior CVD. The impact of cardiovascular risk reduction was estimated as the projected preventable CVD events over 10 years for tirzepatide and semaglutide in the USA. The average predicted 10-year CVD risk score before treatment was 9.3%. Treatment with tirzepatide was associated with significantly greater reduction in predicted 10-year CVD risk compared with semaglutide (absolute reduction from baseline of 2.4% and 1.4%, respectively, P < 0.001). Translating risk reduction to the US population who met treatment eligibility criteria and without prior CVD (∼85 million), an estimated 2 million CVD events could be potentially prevented over 10 years after 72 weeks of tirzepatide treatment, vs. 1.15 million with semaglutide.

Conclusion: In SURMOUNT-5, treatment with tirzepatide was associated with greater predicted 10-year CVD risk reduction compared with semaglutide. This post hoc analysis suggests tirzepatide treatment may provide greater benefit in primary prevention of CVD than semaglutide in people with obesity and overweight.

Registration: ClinicalTrials.gov: NCT05822830.

Keywords: Cardiovascular disease; Semaglutide; Tirzepatide.

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Conflict of interest statement

Conflict of interest: M.A.M.: Professor Mamas’ institution has received research grants from Terumo, Boston Scientific, and Abbott vascular. Professor Mamas is on the speakers bureau for Amgen, Terumo, and Biosensors and has consulting agreements with Eli Lilly, Boehringer Ingelheim, and Novo Nordisk. H.B.: Dr Harold Bays’ research site institution has received research grants from 89Bio, Allergan, Alon Medtech/Epitomee, Aligos, Altimmune, Amgen, Anji Pharma, Abbvie, AstraZeneca, Bioage, Biohaven, Bionime, Boehringer Ingelheim, Carmot, Chorus/Bioage, Eli Lilly, Esperion, Evidera, Fractyl, GlaxoSmithKline, HighTide, Home Access, Horizon, Ionis, Kallyope, LG-Chem, Madrigal, Merck, Mineralys, New Amsterdam, Novartis, Novo Nordisk, Pfizer, Regeneron, Satsuma, Selecta, Shionogi, Skye/Birdrock, TIMI, Veru, Viking, Vivus, Zomagen. H.B. has served as a consultant (e.g. executive/national committee member and/or protocol/drug development advisor) for 89Bio, Altimmune, Amgen, Boehringer Ingelheim, Eva Pharma, Kiniksa, HighTide, Lilly, Novo Nordisk, Regeneron, Rivus, Veru, Zomagen, ZyVersa. R.L., N.U., T.I., C.S., J.P.D., and H.L.-S. are current employees and shareholders of Eli Lilly and Company.

Figures

Figure 1
Figure 1
Percent change from baseline in cardiovascular risk (%), in tirzepatide vs. semaglutide. Data are least-square mean for per cent (%) change from baseline. Error bars indicate standard error. MTD, maximum tolerated dose; SEMA, semaglutide; TZP, tirzepatide.
Figure 2
Figure 2
Percent change from baseline (PCFB) in cardiovascular risk, % in tirzepatide vs. semaglutide, by baseline subgroup. BMI, body mass index; MTD, maximum tolerated dose; SEMA, semaglutide; TZP, tirzepatide.
Figure 3
Figure 3
Predicted 10-year cardiovascular risk and risk factors in tirzepatide vs. semaglutide from baseline to Week 72. Data are least-square mean for post-baseline 10-year cardiovascular disease risk, and observed mean for baseline 10-year cardiovascular disease risk, body mass index, systolic blood pressure, and the proportion of under treatment for hypertension (%). Error bars indicate standard error. MTD, maximum tolerated dose; SEMA, semaglutide; TZP, tirzepatide.

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