Oral semaglutide reduced heart-failure events
In people with type 2 diabetes and existing heart failure, oral semaglutide lowered a combined risk of heart-failure worsening or cardiovascular death without more serious side effects.
*Secondary analysis of randomized clinical trial; Level 2b (OCEBM).
Citation
Pop-Busui R, Rasmussen S, Deanfield JE, et al; for the SOUL Study Group. Oral Semaglutide and Heart Failure Outcomes in Persons With Type 2 Diabetes: A Secondary Analysis of the SOUL Randomized Clinical Trial. JAMA Internal Medicine. 2026;186(4):426-436. doi:10.1001/jamainternmed.2025.7774
Background
Heart failure is common in type 2 diabetes and increases hospitalizations and death. The main SOUL trial showed oral semaglutide reduced major cardiovascular events; this analysis examined heart-failure outcomes by baseline heart-failure status.
Patients
9650 adults aged 50 years or older with type 2 diabetes plus atherosclerotic cardiovascular disease and/or chronic kidney disease, enrolled at 444 centers in 33 countries. Key exclusions included severe, unstable heart failure (New York Heart Association class IV).
Intervention
Once-daily oral semaglutide added to usual care.
Control
Placebo added to usual care.
Outcome
Time to first combined heart-failure outcome: heart-failure hospitalization, urgent heart-failure visit, or cardiovascular death (primary for this analysis).
Follow-up Period
Mean 47.5 months.
Results
| Group |
Significant finding |
Effect size |
Absolute effect |
| Baseline heart failure (n=2229) |
Combined heart-failure outcome (primary) |
Hazard ratio 0.78 (95% confidence interval, 0.63 to 0.96) |
~3.5% fewer events by 3 years; number needed to treat 29 |
| Baseline heart failure with preserved pumping function (n=991) |
Combined heart-failure outcome (primary) |
Hazard ratio 0.59 (95% confidence interval, 0.39 to 0.86) |
~5.4% fewer events overall; number needed to treat ~19 |
Analyses were done by original assigned group (participants kept in their randomized groups). Serious adverse events were similar in those with baseline heart failure.
Limitations
This was a secondary analysis, with multiple subgroup comparisons and limited power for some subgroups. Heart-failure subtype was based on site reports, with missing heart ultrasound data for many participants. Results may not apply to severe or recently unstable heart failure. Benefits were mainly seen in heart failure with preserved pumping function; effect was unclear in reduced pumping function.
Funding
Novo Nordisk funded the trial; several authors reported industry ties.
Clinical Application
For type 2 diabetes with established cardiovascular or kidney disease and existing heart failure—especially preserved pumping function—consider oral semaglutide to reduce heart-failure events.