Endocanabinoid Deficiency Leads to Fibromyalgia. National Pain Foundation Survey

Article by Julia Nelson, Fibro24/7

Endocanabinoid Deficiency Leads to Fibromyalgia. National Pain Foundation Survey

In 2014, a survey of more than 1,300 fibromyalgia patients by the National Pain Foundation and National Pain Report found medical marijuana is more effective than Lyrica, Cymbalta or Savella, the three drugs approved by the Food and Drug Administration to treat the disorder. (If you’re curious about the effectiveness of Lyrica, Cymbalta and Savella, then you might be interested in my post, “Why your fibro meds aren’t working.”)

There’s growing anecdotal evidence that marijuana relieves fibromyalgia pain, but actual research is still scant. Cannabis remains a schedule I controlled substance in the United States, making it difficult for researchers to study the plant’s pain-relieving properties. To date, there have been less than a handful of small studies using cannabis or its derivatives to treat fibromyalgia. Most of those have shown it to be beneficial, especially for pain relief.

But why does cannabis seem to work so well? Dr. Ethan Russo, medical director of PHYTECS, believes fibromyalgia’s multifaceted symptoms may be caused by a deficiency in the body’s endocannabinoid system (ECS), a condition he calls Clinical Endocannabinoid Deficiency (CED). Maybe the reason cannabis is so effective is because it’s simply supplementing what the body needs – similar to how people take a supplement to treat vitamin D or B12 deficiency.

Russo explores the evidence behind his hypothesis in a soon-to-be published review entitled, “Clinical Endocannabinoid Deficiency Reconsidered: Current Research Supports the Theory in Migraine, Fibromyalgia, Irritable Bowel and other Treatment-Resistant Syndromes.” While his idea is still theoretical, there is some early research indicating he may be onto something.

The ECS is made up of cannabinoid receptors within the brain, spinal cord, nerves, gut, organs and other locations in the body. It helps the body maintain homeostasis and is involved in a number of physiological processes, including pain sensation, mood, memory and appetite, among others. The body naturally makes endocannabinoids – the same kinds of endocannabinoids found in cannabis – that feed the ECS and keep it functioning.

Fibromyalgia causes symptoms throughout the body, with the primary ones being pain, fatigue, cognitive and sleep difficulties. Certain conditions, like irritable bowel syndrome (IBS) and migraine, are extremely common among those with fibromyalgia – so much so that Russo believes they may all be connected to an ECS deficiency.

His theory makes sense. The ECS plays a role in so many of the body’s major systems, so if it was indeed malfunctioning, that would account for why fibro sufferers have such varied symptoms. Supplementing the ECS with cannabinoids from the cannabis plant would, in theory, relieve symptoms because the deficiency is being treated.

Russo first posited that fibromyalgia, IBS and migraine may be caused by an ECS deficiency back in 2001. (Click here to read his first review on the subject.) His latest review gives an update on new research that supports ECS deficiency as a possible culprit for fibromyalgia, IBS and migraine.

“Additional studies have provided a firmer foundation for the theory,” he writes in the review, “while clinical data have also produced evidence for decreased pain, improved sleep and other benefits to cannabinoid treatment and adjunctive lifestyle approaches affecting the endocannabinoid system.”

CED is based on the premise that many brain disorders have been linked to neurotransmitter deficiencies. For example, dopamine has been implicated in Parkinson’s disease, and serotonin and norepinephrine have been associated with depression.

“If endocannabinoid function were decreased, it follows that a lowered pain threshold would be operative, along with derangements of digestion, mood and sleep among the almost universal physiological systems sub-served by the ECS,” Russo writes.

That’s a mouthful, but essentially it means if the ECS isn’t properly working, then it could account for the pain, sleep, digestive and other issues so common among fibromyalgia patients. Adding cannabinoids to the body through the use of cannabis may help to bring the ECS back into balance.

“It’s a key in a lock in your body that exists for a reason,” explains Dr. Jahan Marcu, chief scientist with Americans for Safe Access. “We send in cannabinoids to activate this system that’s supposed to be working. It’s a sort of care and feeding of the ECS so it can do its job.”

The best evidence for CED comes from an Italian migraine study, which found reduced levels of an endocannabinoid known as anandamide in patients with chronic migraines versus healthy controls.

“Reduced [anandamide] levels in the cerebrospinal fluid of chronic migraine patients support the hypothesis of the failure of this endogenous cannabinoid system in chronic migraine,” read the study.

Read full article here.

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