#67 Notable Clinical Interest
Emerging findings or policy developments worth monitoring closely.
Cannabis users may require higher anesthetic doses during surgery, which clinicians need to account for during preoperative assessment and anesthesia planning to ensure adequate pain control and prevent intraoperative awareness. Patients who use cannabis should disclose this to their surgical team, as the interaction between cannabis and anesthetics could affect recovery outcomes and postoperative pain management strategies. This finding highlights the importance of obtaining detailed substance use histories before elective procedures to optimize anesthetic protocols and improve patient safety.
A 2024 study examining over 1,600 cannabis users undergoing surgery found that cannabis use was significantly associated with increased anesthetic requirements during procedures. The research identified cannabis as one of four major factors elevating intraoperative anesthetic needs, alongside opioid use, alcohol use, and tobacco use, suggesting that cannabinoids may induce cross-tolerance or alter pain perception pathways in ways that require dosage adjustments. These findings have direct implications for perioperative planning, as anesthesiologists and surgeons need to anticipate potentially higher anesthetic consumption and adjust dosing strategies proactively to maintain adequate sedation and analgesia during surgery. Patients who use cannabis should disclose this to their surgical and anesthetic teams preoperatively so that individualized anesthetic protocols can be established. Clinicians should counsel cannabis-using patients that discontinuing use before elective surgery may help reduce perioperative anesthetic requirements and associated risks, while perioperative teams should be prepared with appropriate dosing protocols for those unable or unwilling to abstain.
“What we’re seeing in this larger observational cohort is a signal that regular cannabis users may require adjusted anesthetic dosing during surgery, but I want to be clear that observational data like this shows association, not necessarily causation, and we need mechanistic studies to understand whether this reflects tolerance, altered drug metabolism, or other factors before we can confidently change our perioperative protocols.”
🏥 The emerging evidence that cannabis users may require increased anesthetic doses during surgery has important implications for perioperative management, though the mechanisms remain incompletely understood and likely involve complex interactions between cannabinoid receptor signaling, opioid tolerance, and altered pain processing. While the 2024 study of over 1,600 cannabis users provides valuable observational data, clinicians should recognize that cannabis use patterns (frequency, potency, time since last use) vary considerably and may not be uniformly captured in preoperative assessments, making it difficult to predict individual anesthetic requirements. Additionally, cannabis use may be underreported due to legal and stigma concerns, potentially masking the true prevalence of this issue in surgical populations. The practical takeaway for anesthesiologists and surgical teams is to maintain heightened vigilance during induction and maintenance in patients with known or suspected regular cannabis use, ensuring appropriate monitoring and titration protocols while recogn
💬 Join the Conversation
Have a question about how this applies to your situation? Ask Dr. Caplan →
Want to discuss this topic with other patients and caregivers? Join the forum discussion →
Have thoughts on this? Share it:
