A Comparison of Post-Operative Analgesia Requirements In Recreational Cannabis Users Versus Cannabis Naïve Inflammatory Bowel Disease Patients

2019-08-18 20:09:36 | BioPortfolio


Cannabis is a drug that is widely used for recreational purpose. In most patients undergoing surgery, opioids are the most widely used mode of pain relief, during and following surgery. Anecdotally it has been observed that cannabis users required unexpectedly high doses of opioids. The purpose of this study is to compare opioid requirements between cannabis users and non- users after the surgery. Currently, post-operative opioid doses are determined based on various patient factors such as pre-operative opioid use, patient weight, age and sensitivity to opioids during surgery. Patients' requirements may be underestimated and opioid regimens need to be escalated in the first 24 hours in order to alleviate uncontrolled pain in cannabis users. Better understanding of the impacts of cannabis use on post-operative opioid requirements would help the Acute Pain Service optimize post-operative pain management for patients who use cannabis pre-operatively.

Study Design


Cannabis Use, Opioid Consumption


Sinai Health System




Mount Sinai Hospital, Canada

Results (where available)

View Results


Published on BioPortfolio: 2019-08-18T20:09:36-0400

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Medical and Biotech [MESH] Definitions

A synthetic opioid that is used as the hydrochloride. It is an opioid analgesic that is primarily a mu-opioid agonist. It has actions and uses similar to those of MORPHINE. It also has a depressant action on the cough center and may be given to control intractable cough associated with terminal lung cancer. Methadone is also used as part of the treatment of dependence on opioid drugs, although prolonged use of methadone itself may result in dependence. (From Martindale, The Extra Pharmacopoeia, 30th ed, p1082-3)

A class of opioid receptors recognized by its pharmacological profile. Kappa opioid receptors bind dynorphins with a higher affinity than endorphins which are themselves preferred to enkephalins.

A class of opioid receptors recognized by its pharmacological profile. Mu opioid receptors bind, in decreasing order of affinity, endorphins, dynorphins, met-enkephalin, and leu-enkephalin. They have also been shown to be molecular receptors for morphine.

A class of opioid receptors recognized by its pharmacological profile. Delta opioid receptors bind endorphins and enkephalins with approximately equal affinity and have less affinity for dynorphins.

One of the three major groups of endogenous opioid peptides. They are large peptides derived from the PRO-OPIOMELANOCORTIN precursor. The known members of this group are alpha-, beta-, and gamma-endorphin. The term endorphin is also sometimes used to refer to all opioid peptides, but the narrower sense is used here; OPIOID PEPTIDES is used for the broader group.

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