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Regurgitation under anesthesia in a fasted patient prescribed semaglutide for weight loss: a case report
Open accessAbstract
Purpose Glucagon-like peptide-1 receptor agonists (GLP-1 RAs) such as semaglutide are a class of medications prescribed to treat type 2 diabetes mellitus, and more recently, as an adjunct for weight loss because of its effects of delaying gastric emptying and suppressing appetite. Semaglutide is a long-acting agent with a half-life of approximately one week, and there are currently no guidelines that address the perioperative management of such agents. Clinical features We describe an unexpected case of regurgitation of a large volume of gastric contents upon induction of general anesthesia in a nondiabetic, nonobese patient despite a long preoperative fasting period (20 hr for solids and eight hours for clear fluids). This patient had no traditional risk factors for regurgitation or aspiration but was taking the GLP-1 RA semaglutide for weight loss and had last taken the medication two days before their scheduled procedure. Conclusions Patients taking long-acting GLP-1 RAs such as semaglutide may be at risk of pulmonary aspiration under anesthesia. We propose strategies to mitigate this risk including holding the medication four weeks prior to a scheduled procedure when feasible and considering full stomach precautions.
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“Similarly, Gulak and Murphy [44] reported a 48-year-old female patient using semaglutide for weight loss who regurgitated and aspirated a large volume of liquid gastric contents during induction.”
From Delayed gastric emptying induced by glucagon-like peptide-1 receptor agonists and its implications for perioperative risk during anesthesia (2026) · cites this paper as [44]
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“there have been recent case reports of patients who are taking these drugs before surgery having pulmonary aspiration or increased residual gastric contents despite appropriate fasting [5, 6, 7, 8, 9, 10, 11, 12, 13, 14].”
From Association between glucagon-like peptide-1 receptor agonist use and peri-operative pulmonary aspiration: a systematic review and meta-analysis (2025) · cites this paper as [7]
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“However, case reports describing clinically relevant evidence for delayed gastric emptying in appropriately starved patients either undergoing sedation or general anaesthesia for elective procedures [9, 11, 12, 64, 65, 66] or endoscopy [10, 67] (see online Supporting Information Table S1) have been published.”
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Metadata
- Authors
- Gulak, M. A., & Murphy, P.
- Affiliations
- University of Toronto (CA)
- University Health Network (CA)
- Corresponding author
- Gulak, Michael A.
- ORCID
- Gulak, Michael A.
- Venue
- Canadian Journal of Anesthesia/Journal canadien d'anesthésie
- Published
- 2023-06-06
- Volume
- 70
- Issue
- 8
- Pages
- 1397-1400
- ISSN
- 0832-610X (ISSN-L)
- 1496-8975
- OpenAlex
- W4379522676
- Cited by
- 153
- References
- 16
- Citations by year
- 2026: 32 · 2025: 54 · 2024: 56 · 2023: 11
- FWCI
- 40.99
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Canadian Journal of Anesthesia/Journal canadien d anesthésie (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Surgery › Enhanced Recovery After Surgery
- Health Sciences › Medicine › Anesthesiology and Pain Medicine › Airway Management and Intubation Techniques
- Health Sciences › Medicine › Anesthesiology and Pain Medicine › Anesthesia and Sedative Agents
- Keywords
- semaglutide, GLP-1 receptor agonists, gastric regurgitation, pulmonary aspiration, general anesthesia, preoperative fasting, anti-obesity drugs, perioperative care
- MeSH terms
- Glucagon-Like Peptide-1 Receptor, Glucagon-Like Peptide-1 Receptor Agonists, Semaglutide, Anesthesia, General, Diabetes Mellitus, Type 2, Fasting, Humans, Hypoglycemic Agents, Weight Loss, Glucagon-Like Peptide 1
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