Does Cannabis Use Before Surgery Affect Pain and Opioid Needs Afterward?
Cannabis users may experience higher postoperative pain and need more opioids, but results vary significantly by surgical type.
Quick Facts
What This Study Found
Of 42 studies, 33.3% found cannabis users reported higher postoperative pain, 23.8% found no difference, and 42.9% indicated greater postoperative opioid requirements. Results varied by surgical specialty — spine and mixed cohorts showed more opioid use, while arthroplasty studies often showed no difference.
Key Numbers
42 studies reviewed. Pain outcomes: 33.3% found higher pain in cannabis users, 23.8% no difference, 4.8% reduced pain. Opioid use: 42.9% found greater requirements, 40.5% no difference, 7.1% reduced use. Spine populations showed increased opioid use in 55% of studies.
How They Did This
Systematic search of PubMed, CINAHL, and Embase identifying 42 studies from the past ten years examining preoperative cannabis use and its relationship with postoperative pain and opioid consumption, analyzed via narrative synthesis.
Why This Research Matters
With more surgical patients using cannabis, surgeons and anesthesiologists need clear guidance on how to manage perioperative pain — this review shows the answer isn't one-size-fits-all.
The Bigger Picture
The mixed results suggest that cannabis's effect on surgical recovery may depend on factors like surgery type, cannabis use patterns, and individual biology — pointing toward personalized perioperative approaches rather than blanket policies.
What This Study Doesn't Tell Us
Heterogeneous exposure definitions and outcome metrics limit cross-study comparisons. Most studies are retrospective and observational. Cannabis potency, frequency, and method of use were rarely standardized.
Questions This Raises
- ?Why do outcomes differ so much by surgical type?
- ?Would standardized cannabis use assessments improve surgical planning?
- ?Could controlled perioperative cannabis use actually benefit some patients?
Trust & Context
- Key Stat:
- Evidence Grade:
- Comprehensive review of 42 studies provides broad evidence base, but heterogeneity in methods and mixed results prevent definitive conclusions.
- Study Age:
- Reviews studies from the past ten years, published 2026.
- Original Title:
- Preoperative cannabinoid exposure and postoperative pain: A narrative review.
- Published In:
- Journal of clinical anesthesia, 109, 112097 (2026)
- Authors:
- King, Daniel D(2), Temmermand, Rhea, Greenwood, Jennifer E
- Database ID:
- RTHC-08390
Evidence Hierarchy
Summarizes existing research without a strict systematic method.
What do these levels mean? →Frequently Asked Questions
Should I stop using cannabis before surgery?
Research suggests cannabis users may experience more pain and need more opioids after surgery, particularly for spine procedures. Discussing your cannabis use with your surgical team is important for optimizing pain management.
Does cannabis use affect all surgeries the same way?
No — spine surgery patients who use cannabis more often needed extra opioids (55% of studies), while joint replacement studies mostly found no difference (62%), suggesting the impact varies by procedure type.
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Cite This Study
https://rethinkthc.com/research/RTHC-08390APA
King, Daniel D; Temmermand, Rhea; Greenwood, Jennifer E. (2026). Preoperative cannabinoid exposure and postoperative pain: A narrative review.. Journal of clinical anesthesia, 109, 112097. https://doi.org/10.1016/j.jclinane.2025.112097
MLA
King, Daniel D, et al. "Preoperative cannabinoid exposure and postoperative pain: A narrative review.." Journal of clinical anesthesia, 2026. https://doi.org/10.1016/j.jclinane.2025.112097
RethinkTHC
RethinkTHC Research Database. "Preoperative cannabinoid exposure and postoperative pain: A ..." RTHC-08390. Retrieved from https://rethinkthc.com/research/king-2026-preoperative-cannabinoid-exposure-and
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 RethinkTHC 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.