# Marijuana Use and Its Impact on Outpatient Anesthesia

> **Author:** Benjamin Caplan, MD (ABFM Board Certified, MA Lic. #240562, NPI: 1962722637)
> **Publisher:** CED Clinic (https://cedclinic.com)
> **Canonical URL:** https://cedclinic.com/anesthesia-progress-clinical-study-marijuana-use/
> **Published:** 2026-03-20T17:27:12-04:00 | **Last Modified / Clinically Audited:** 2026-09-28T15:54:08-04:00
> **Clinical Summary:** Explore anesthesia progress clinical study marijuana use and its effects on outpatient anesthesia management and patient safety.

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CED Clinical Relevance  #72Notable Clinical Interest  Emerging findings or policy developments worth monitoring closely.
🔬 Evidence Watch  |  CED Clinic
AnesthesiaPerioperative CareThcDrug InteractionsClinical Review

Journal
Anesthesia progress

Study Type
Clinical Study

Population
Human participants

Why This Matters

With [cannabis use](https://cedclinic.com/cannabis-cardiovascular-health-insights-2024/) increasing rapidly and products becoming more potent, anesthesia providers need evidence-based guidance for perioperative management. This review addresses critical safety considerations for the growing population of cannabis-using surgical patients.

Clinical Summary
This comprehensive review examines [cannabis pharmacology](https://cedclinic.com/cannabis-tolerance-behavioral-models/) and perioperative implications for anesthesia providers. The authors detail how [chronic cannabis use](https://cedclinic.com/reverse-cholesterol-transport-function-cannabis-users/) downregulates CB1 receptors, leading to tolerance and withdrawal, while affecting multiple organ systems including cardiovascular, respiratory, and gastrointestinal function. Key clinical concerns include delayed gastric emptying increasing aspiration risk, cardiovascular instability, and potential drug interactions. The review emphasizes the need for thorough preoperative screening and individualized anesthetic management based on usage patterns and product potency.

Dr. Caplan’s Take

“This review fills a crucial knowledge gap for anesthesiologists who increasingly encounter cannabis users but lack standardized protocols. The emphasis on CB1 receptor downregulation and multi-system effects provides the mechanistic framework needed for rational perioperative decision-making.”

Clinical Perspective
🧠 Anesthesia providers should routinely screen for [cannabis use](https://cedclinic.com/cannabis-cardiovascular-health-insights-2024/) and document usage patterns, potency, and timing of last use. Consider delayed gastric emptying protocols and be prepared for altered anesthetic requirements, particularly in chronic users who may need higher doses due to cross-tolerance with certain anesthetic agents.

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📰 Source: [https://pubmed.ncbi.nlm.nih.gov/41791719/](https://pubmed.ncbi.nlm.nih.gov/41791719/)

Table of Contents

- [FAQ](#FAQ)[How does chronic cannabis use change the body in ways that matter for anesthesia?](#How_does_chronic_cannabis_use_change_the_body_in_ways_that_matter_for_anesthesia)
- [What are the main anesthesia safety concerns for patients who use cannabis?](#What_are_the_main_anesthesia_safety_concerns_for_patients_who_use_cannabis)
- [What does the review recommend before surgery for people who use cannabis?](#What_does_the_review_recommend_before_surgery_for_people_who_use_cannabis)
- [Related](#Related)

## FAQ

### How does chronic cannabis use change the body in ways that matter for anesthesia?

The review, published in Anesthesia Progress, explains that [chronic cannabis use](https://cedclinic.com/reverse-cholesterol-transport-function-cannabis-users/) downregulates CB1 receptors, which leads to tolerance and withdrawal. It also describes effects on multiple organ systems, including cardiovascular, respiratory, and gastrointestinal function, as part of its look at perioperative implications for anesthesia providers.

### What are the main anesthesia safety concerns for patients who use cannabis?

The review highlights three key clinical concerns: delayed gastric emptying, which increases aspiration risk; cardiovascular instability; and potential drug interactions. It presents these as part of a broader look at [cannabis pharmacology](https://cedclinic.com/cannabis-tolerance-behavioral-models/) and what it means for anesthesia care around surgery.

### What does the review recommend before surgery for people who use cannabis?

The review emphasizes thorough preoperative screening for cannabis use. It also calls for individualized anesthetic management that takes into account each patient’s usage patterns and the potency of the products they use, rather than one approach for every cannabis user.

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### Related

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### Verification & Medical Governance

- **Lead Clinical Author:** Benjamin Caplan, MD
- **Credentials:** Board Certified in Family Medicine (ABFM), Former CMO Canna Care Docs (250,000+ patients supervised), Founder & CMO CED Clinic & CED Foundation, Author of *The Doctor-Approved Cannabis Handbook* (Penguin Random House).
- **Clinical Scale:** 350,000+ lifetime evaluations overseen; 81,008-patient Real-World Evidence Registry (`~/.ced_rwe_vault.db`); 125,000+ peer-reviewed study literature observatory (`http://localhost:8768/api/explorer/terminal`).
- **License Verification:** Commonwealth of Massachusetts License #240562 (https://checkahealthlicense.mass.gov/).
- **NPI Registry:** 1962722637 (https://npiregistry.cms.hhs.gov/provider-view/1962722637).
- **Ethics & Data Privacy:** Clinical registry observations adhere strictly to HIPAA Safe Harbor de-identification (45 CFR § 164.514(b)) and criteria for secondary research exemption under 45 CFR § 46.104(d)(4).