Is semaglutide safe if I have heart disease or am at high risk?

This large review of nearly 55,000 patients found semaglutide actually reduces the risk of death and heart attack in people at high cardiovascular risk, suggesting it is not only safe but protective for the heart.

Does semaglutide help people without type 2 diabetes too?

Yes. The trials included people with overweight or obesity who did not have type 2 diabetes, and semaglutide still showed cardiovascular benefits across these groups.

How confident are scientists in these findings?

The researchers rated the evidence for reduced mortality and heart attack risk as high certainty, the strongest possible rating, meaning we can be very confident these benefits are real.

Semaglutide Heart Benefits & Side Effects: 50-Trial Review

Key takeaways

✓15% lower risk of death from any cause in high-risk patients
✓23% lower risk of heart attack confirmed across 50 trials
✓Overall serious adverse events also reduced by 7%

Quick specs

Journal	BMC medicine
Year	2025
PMID	41286875

What This Study Looked At

Researchers analyzed 50 clinical trials involving nearly 55,000 participants to understand both the benefits and side effects of semaglutide (the active ingredient in Ozempic and Wegovy) in people at higher risk of heart problems.

Who Was Studied

The participants included people with:

Type 2 diabetes
Overweight or obesity
Type 2 diabetes plus chronic kidney disease
Type 2 diabetes plus overweight

The Good News

Semaglutide showed meaningful protective effects:

15% reduction in risk of death from any cause
23% reduction in risk of heart attack
7% reduction in serious adverse events overall

Researchers rated this evidence as high certainty, meaning we can be very confident in these findings.

The Side Effects

On the downside, semaglutide significantly increased digestive side effects:

Nausea: 3 times more likely compared to placebo
Vomiting: Over 4 times more likely
Diarrhea: Nearly twice as likely

Importantly, these were classified as non-serious side effects, meaning they were uncomfortable but not life-threatening.

What This Means for You

If you are at increased risk of cardiovascular events and your doctor has recommended semaglutide, this large review strongly supports its ability to protect your heart and reduce your risk of dying. The digestive side effects are real and common, but they are generally manageable and considered non-serious medically. Always discuss your individual risk-benefit balance with your healthcare team.

References & Sources

Frequently asked questions

Studies show semaglutide significantly increases the risk of nausea, vomiting, and diarrhea. These side effects are common but are considered non-serious and often improve over time as your body adjusts to the medication.

Editorial note

This article is for educational purposes only and does not constitute medical advice. Always consult your healthcare provider before making changes to your diabetes management. Last reviewed: July 16, 2026 by the MDS Diabetes editorial team.

What to do next

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Semaglutide Cuts Heart Attack Risk But Causes Nausea