Does Taking GLP-1 Drugs Before Bariatric Surgery Affect Long-Term Outcomes?
Preoperative GLP-1 therapy before bariatric surgery was evaluated for its impact on weight loss and complications over three years.
Quick Facts
What This Study Found
Propensity-matched analysis evaluated whether preoperative GLP-1 use affects bariatric surgery outcomes over three years.
Key Numbers
N=215 (54 GLP-1, 161 non-GLP-1); pre-op TWL 3.7%; 12-month TWL: 29.8% vs 28.1%; 24-month: 28.9% vs 27.2%; 36-month: 26.9% vs 25.4%.
How They Did This
Retrospective cohort with propensity score matching (1:1) comparing preoperative GLP-1 users vs. non-users after RYGB or SG.
Why This Research Matters
As more patients try GLP-1 drugs before surgery, knowing whether prior medication use helps or hinders surgical outcomes is critical.
The Bigger Picture
This addresses the evolving treatment sequencing question — whether GLP-1 drugs complement or compete with bariatric surgery.
What This Study Doesn't Tell Us
Retrospective design with potential unmeasured confounders despite propensity matching. Excluded revision surgeries and postoperative GLP-1 use.
Questions This Raises
- ?Should GLP-1 therapy be routinely offered before bariatric surgery?
- ?Does preoperative weight loss via GLP-1 drugs reduce surgical complications?
Trust & Context
- Key Stat:
- 3-year follow-up Long-term outcomes tracked after bariatric surgery in patients with and without preoperative GLP-1 use
- Evidence Grade:
- Retrospective cohort with propensity matching — good methodology for observational research but cannot replace a randomized trial.
- Study Age:
- Published in 2025, addressing a rapidly evolving clinical question in obesity treatment sequencing.
- Original Title:
- Surgical Outcomes in Patients with Preoperative GLP-1 Therapy: A Retrospective Analysis.
- Published In:
- Obesity surgery, 35(9), 3847-3857 (2025)
- Authors:
- Poljo, Adisa, Reichl, Jakob J, Bürgi, Simon, Dirnberger, Amanda S, Schneider, Romano, Klasen, Jennifer M, Billeter, Adrian T, Müller, Beat P, Peterli, Ralph, Kraljević, Marko
- Database ID:
- RPEP-13074
Evidence Hierarchy
Watches what happens naturally without intervening.
What do these levels mean? →Frequently Asked Questions
Should I try GLP-1 drugs before bariatric surgery?
This study evaluated that exact question. Some patients use GLP-1 drugs first, then pursue surgery — the impact on long-term outcomes was analyzed.
Why do patients switch from GLP-1 drugs to surgery?
Reasons include insufficient weight loss with medication alone, desire for more durable results, or difficulty maintaining medication access.
Read More on RethinkPeptides
Cite This Study
https://rethinkpeptides.com/research/RPEP-13074APA
Poljo, Adisa; Reichl, Jakob J; Bürgi, Simon; Dirnberger, Amanda S; Schneider, Romano; Klasen, Jennifer M; Billeter, Adrian T; Müller, Beat P; Peterli, Ralph; Kraljević, Marko. (2025). Surgical Outcomes in Patients with Preoperative GLP-1 Therapy: A Retrospective Analysis.. Obesity surgery, 35(9), 3847-3857. https://doi.org/10.1007/s11695-025-08136-5
MLA
Poljo, Adisa, et al. "Surgical Outcomes in Patients with Preoperative GLP-1 Therapy: A Retrospective Analysis.." Obesity surgery, 2025. https://doi.org/10.1007/s11695-025-08136-5
RethinkPeptides
RethinkPeptides Research Database. "Surgical Outcomes in Patients with Preoperative GLP-1 Therap..." RPEP-13074. Retrieved from https://rethinkpeptides.com/research/poljo-2025-surgical-outcomes-in-patients
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkPeptides research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.