25/09/2025
🔴 GLP-1 RAs and Anesthesia:
2025 Consensus Update:
Patients on GLP-1 receptor agonists (e.g., semaglutide, tirzepatide, dulaglutide) can continue their medications before anesthesia if asymptomatic, with extended fasting to reduce aspiration risk.
🟠 Guideline Evolution
▪️ GLP-1 RAs delay gastric emptying, raising concern for aspiration during anesthesia
▪️ 2023 ASA guidance recommended holding GLP-1s for one half-life
▪️ 2024 update allowed continued use in low-risk patients, but advised a 24-hour liquid diet for higher-risk groups
▪️ Experts criticized lack of evidence supporting stratification by dose or phase
🟡 New 2025 Multidisciplinary Consensus
▪️ Led by the Society for Perioperative Assessment and Quality Improvement
▪️ Endorsed by AACE
▪️ Based on 112-study review and expert Delphi process
▪️ Recommends continuing GLP-1 RAs with extended fasting, not discontinuation
🟢 Fasting Guidelines for Asymptomatic Patients
▪️ Stop solid food ≥24 hours before anesthesia
▪️ Allow low-glucose clear liquids until 4 hours pre-op
▪️ Avoid high-glucose clear liquids (≥10%) for 8 hours pre-op
▪️ Acceptable: water, black coffee, broth, sugar-free electrolyte drinks
▪️ Avoid: juice, soda, sweetened beverages, anything with cream or milk
🔵 When to Delay Surgery
▪️ Significant nausea, vomiting, or poor oral intake
▪️ Active GI symptoms or suspected gastric stasis
▪️ Refer to prescribing physician for symptom and medication management
🟣 Restarting After Surgery
▪️ Resume GLP-1 RAs when normal diet is tolerated
▪️ Avoid restarting if NPO or symptomatic
▪️ Titrate slowly if therapy was interrupted
🔴 Why Continuation Is Preferred
▪️ Stopping GLP-1s can worsen glycemic control in T2D
▪️ Discontinuation may lead to nausea or weight regain
▪️ Re-titration is burdensome and affects adherence
▪️ Delayed gastric emptying may persist even after drug is held
🟠 Clinical Takeaway
▪️ Don’t stop GLP-1 RAs routinely—extend fasting instead
▪️ Screen for symptoms and assess risk
▪️ Collaborate across specialties for perioperative care
▪️ Consider gastric ultrasound in uncertain cases.