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There’s now more scientific evidence for what many patients have known for awhile: Smoking marijuana can ease chronic neuropathic pain and help patients sleep better, according to a team of researchers in Montreal.
The new study, published Monday in the Canadian Medical Association Journal, found that pain intensity among patients decreased with higher-potency marijuana, reports Caroline Alphonso of The Globe and Mail. The study represents an important scientific attempt to determine the medicinal benefits of cannabis.
Patients suffering from neuropathic pain often use opioid pain medication, antidepressants and local anesthetics, but all of those drugs have limitations, and the side effects of these substances can rival the conditions they are supposed to treat. Unlike “normal” pain, which results from stimulation of pain receptors in the body, neuropathic pain results from damage to or dysfunction of the central or peripheral nervous system, reports Deborah Mitchell at EmaxHealth.
But many politicians and medical personnel have been reluctant to advocate medical marijuana because, even though patients champion its use, there have been calls for more scientific studies.
“Patients have repeatedly made claims that smoked cannabis helps to treat pain, but the issue for me had always been the lack of clinical research to support that claim,” said Dr. Mark Ware, director of clinical research at the Alan Edwards Pain Management Unit of the McGill University Health Centre in Montreal. In this small but randomized, controlled trial, “the pain reductions were modest, but significant,” he said. “And it was in people for whom nothing else worked.”
Twenty-one adults with post-traumatic or post-surgical chronic pain took part in the study. They randomly received marijuana at three different strengths: with a tetrahydrocannabinol (THC) content of 2.5 percent, 6 percent and 9.4 percent, and a placebo. THC is one of the main active ingredients in the cannabis plant.
All of the patients rotated through each of the four dosages, with nine days of no smoking in between.
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