Overview: Chronic Pain and Cannabis-Based Medicines

Area of Science:

• Neuroscience
• Pain Medicine
• Pharmacology

Background:

• Chronic pain is recognized as a distinct condition when linked to emotional distress and functional limitations.
• Cortico-mesolimbic connectome dysfunction is key, with overlapping nociceptive and stress system signals.
• The endocannabinoid system modulates pain signal processing and stress response.

Purpose of the Study:

• To evaluate the clinical efficacy of cannabis-based medicines (CBM) for chronic pain.
• To explore the role of CBM in managing pain affect, physical function, and sleep quality.
• To investigate the mechanism of CBM in pain processing, particularly stress-related pain.

Main Methods:

• Review of clinical evidence for CBM in chronic pain.
• Analysis of CBM's impact on pain, emotional distress, and functional impairment.
• Exploration of the endocannabinoid system's role in CBM's analgesic effects.

Main Results:

• Moderate evidence suggests CBM can significantly reduce pain, especially pain affect.
• CBM use is associated with improvements in physical function and sleep quality for some patients.
• The analgesic effects of CBM appear independent of the specific pain etiology.
• CBM preferentially modulates stress-associated pain processing.

Conclusions:

• Cannabis-based medicines offer a therapeutic option for chronic pain, particularly when associated with stress.
• CBM demonstrate efficacy in improving pain, mood, function, and sleep in a subset of chronic pain patients.
• Targeting the endocannabinoid system with CBM may provide a novel approach to managing complex chronic pain conditions.