Study: Vaporized, Low-Potency Marijuana Mitigates Neuropathic Pain

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Previous clinical trials have indicated that inhaled cannabis can safety and effectively relieve various types of pain

 

by Paul Armentano, NORML Deputy Director

 

The administration of vaporized, low THC cannabis is associated with reduced pain in subjects with neuropathy, according to clinical trial data published online by The Journal of Pain.

Investigators at the University of California, Davis Medical Center conducted a double-blind, placebo-controlled, crossover study evaluating the analgesic efficacy of vaporized marijuana in 39 subjects, the majority of whom were experiencing neuropathic pain despite traditional treatment. Subjects inhaled cannabis of either moderate THC (3.53 percent), low dose THC (1.29 percent), or zero THC (placebo). Subjects continued to take all other concurrent medications as per their normal routine during the 3- to 4-week study period. Spontaneous pain relief, the primary outcome variable, was assessed by asking participants to indicate the intensity of their current pain on a 100-mm visual analog scale (VAS) between 0 (no pain) and 100 (worst possible pain).

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Researchers reported: “Both the low and medium doses proved to be salutary analgesics for the heterogeneous collection of neuropathic pain conditions studied. Both active study medications provided statistically significant 30% reductions in pain intensity when compared to placebo.”

They concluded: “Both the 1.29% and 3.53% vaporized THC study medications produced equal antinociception at every time point. … [T]he use of low doses could potentially be prescribed by physicians interested in helping patients use cannabis effectively while minimizing cognitive and psychological side effects. Viewed with this in mind, the present study adds to a growing body of literature supporting the use of cannabis for the treatment of neuropathic pain. It provides additional evidence of the efficacy of vaporized cannabis as well as establishes low-dose cannabis (1.29%) as having a favorable risk-benefit ratio.”

Previous clinical trials have indicated that inhaled cannabis can safety and effectively relieve various types of pain, particularly neuropathy — a hard-to-treat nerve condition often associated with cancer, HIV, spinal cord injury, diabetes, multiple sclerosis, and other conditions. These include the following double-blind, placebo-controlled (FDA gold-standard) studies:

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Ware et al. 2010. Smoked cannabis for chronic neuropathic pain: a randomized controlled trial. CMAJ 182: 694-701.

Wilsey et al. 2008. A randomized, placebo-controlled, crossover trial of cannabis cigarettes in neuropathic pain. Journal of Pain 9: 506-521.

Ellis et al. 2008. Smoked medicinal cannabis for neuropathic pain in HIV: a randomized, crossover clinical trial. Neuropsychopharmacology 34: 672-80.

Abrams et al. 2007. Cannabis in painful HIV-associated sensory neuropathy: a randomized placebo-controlled trial. Neurology 68: 515-521.

Wallace et al. 2007. Dose-dependent Effects of Smoked Cannabis on Capsaicin-induced Pain and Hyperalgesia in Healthy Volunteers Anesthesiology 107: 785-796.

Separate clinical trial data also reports that inhaled “cannabis augments the analgesic effect of opioids” and therefore “may allow for opioid treatment at lower doses with fewer side effects.”

Since 1999, US sales of opiate drugs have tripled in number and in 2010, a record-setting 254 million prescriptions for opioids were filled in the United States — enough to medicate every American adult around the clock for a month. (In particular, the manufacturing of the drug Oxycodone has increased from 8.3 tons in 1997 to 105 tons in 2011, an increase of 1,200 percent.) Overdose deaths from the use of prescription painkillers are also now at record levels, totaling some 15,000 annually — more than triple the total a decade ago.

Source – NORML

  

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  • Oatsie Otero

    I am a 66 year old Viet Nam combat vet that would love to have the vaporizor to help with PTSD and chronic pain that will not allow me to do the things that a grandpa should do with his grandchildren and with his family. I also smoke MM and find that I am able to change the PTSD episodes before they take me back to Nam. I have tried a vaporizer before and find that I am able to medicate more at ease without the constant coughing from smoking a joint or a bong. I have found that the only script drug I use is vicodin and I am wanting to quit using this drug and morphine sulfate for my pain. When I travel I would be able to use the vaporizer any where without being suspicious and having a cloud(smoke) over my head like Pig Pen. It would greatly be appreciated by me to have this vaporizer for medication purposes. Thank you for this chance.

    Blessings
    Oatsie