Quantification of Cannabinoids and Comparison to Post-Surgical Pain Medication Requirements and Surgical Outcomes

Quantification of Endo- and Phytocannabinoids With Comparison to Pain Medication Requirements and Surgical Outcomes for Patients Undergoing Abdominal Surgery for Cancer

To determine how daily cannabis use affects surgical outcomes.

To determine if patients who are daily cannabis users that are undergoing inpatient abdominal surgery for the treatment of cancer are different from non-cannabis users regarding phytocannabinoid and endocannabinoid levels, pain scores, pain medication requirements, and surgical complications.

Inclusion Criteria:

• Patients > 18 years old
• Undergoing abdominal surgery for the treatment of cancer
• Report no cannabis use in the last year or chronic cannabis use (defined as at least weekly use for 3 months or more)

Exclusion Criteria:

• patients with chronic pain, chronic pain syndrome on opioids
• female patients who are pregnant or lactating
• patients who report use of illicit substances