Category Archives: Pain

Study: Cannabis May Relieve Parkinson’s Related Pain

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(December 22, 2012) “People suffering from Parkinson’s disease often experience random pains. Until recently these pains were not conclusively linked to the disease. However, a recent study conducted at Rabin Medical Center has not only shown that the pain is a symptom of the disease, but also suggests a possible treatment – cannabis.

“50 to 80 percent of Parkinson’s patients suffer from pain that could not be treated properly,” says Professor Ruth Djaldetti, senior neurologist and Head of the Movement Disorder Clinic, who conducted the research. “In light of the study’s results, we could treat the pain efficiently and improve the patient’s quality of life.”

The research examined eight genes known to be involved in pain, among 237 patients with Parkinson’s disease. They found that those suffering from this type of pain have gene sequence changes associated with the activity of cannabis-like substances produced in the brain and another gene associated with pain transmission.

According to Djaldetti, the results of the study support the approach that patients suffering from this type of pain might be able to find relief by treatment with cannabis. Despite the promising results, Djaldetti says that further research should be done on the subject, so that in the future, medical treatment can be adjusted according to individual gene-mapping.

The study was published in the European Journal of Pain.”http://onlinelibrary.wiley.com/doi/10.1002/j.1532-2149.2012.00134.x/abstract

http://nocamels.com/2012/12/study-cannabis-may-relieve-parkinsons-related-pain/

Marijuana-Like Compounds May Aid Array Of Debiliatiing Conditions Ranging From Parkinson’s Disease To Pain

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“Oct. 27, 2004 — No longer a pipe dream, new animal research now indicates that marijuana-like compounds can aid a bevy of debilitating conditions, ranging from brain disorders such as amyotrophic lateral sclerosis (ALS) and Parkinson’s disease, to pain and obesity.

Research from California Pacific Medical Center in San Francisco points to the promise of marijuana-like treatments for those with the fatal brain disorder ALS, also known as Lou Gehrig’s disease.

“Our research indicates that select marijuana compounds, including THC, significantly slow the disease process and extend the life of mice with ALS,” says study author Mary Abood, PhD.

The study extends earlier work from Abood’s group that found that THC also can alleviate some ALS symptoms, like muscle spasms, in patients.

ALS wreaks its havoc by harming nerve cells that control muscles. As a consequence of the damage, an estimated 5,000 Americans afflicted annually experience progressive muscle weakness that can hinder movement, speech, even swallowing and breathing. New treatments for ALS are desperately needed…

“For the first time, our research shows the neuroprotective value of marijuana-like compounds in a well-established animal model of Parkinson’s disease,” says study author Andrea Giuffrida, PhD, of the University of Texas Health Science Center in San Antonio.

Parkinson’s afflicts some 1 million Americans. Symptoms include slowness of movement, muscle stiffness, and shaky tremors, which can harm a person’s ability to walk, talk, write, and eat. This havoc results from the death or injury of brain cells that produce the chemical dopamine.

“There are therapies that can help replenish depleted levels of dopamine and provide symptomatic relief, but none can reverse, prevent, or delay the progression of Parkinson’s disease,” says Giuffrida. “Our research shows that marijuana-like compounds may be able to answer this need.””

Read more: http://www.sciencedaily.com/releases/2004/10/041027102621.htm

 

Latest advances in cannabinoid receptor agonists.

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“Since the discovery of cannabinoid receptors and their endogenous ligands in early 1990s, the endocannabinoid system has been shown to play a vital role in several pathophysiological processes. It has been targeted for the treatment of several diseases including neurodegenerative diseases (Parkinson’s disease, Alzheimer’s disease, Huntington’s disease and MS), cancer, obesity, inflammatory bowel disease, neuropathic and inflammatory pain. The last decade has witnessed remarkable advances in the development of cannabinergic ligands displaying high selectivity and potency towards two subtypes of cannabinoid receptors, namely CB1 and CB2.”

 “…we highlight the latest advances made in the development of cannabinoid agonists and summarize recently disclosed, novel chemical scaffolds as CB-selective agonists…”

 

“CONCLUSIONS:

Our analysis reveals prolific patenting activity mainly in the CB2 selective agonist area. Limiting the BBB penetrability, thereby, leading to peripherally restricted CB1/CB2 agonists and enhancing CB2-selectivity emerge as likely prerequisites for avoidance of adverse central CB1 mediated side effects.”

http://www.ncbi.nlm.nih.gov/pubmed/19939187

Smoked cannabis proven effective in treating neuropathic pain.

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UC San Diego Health

“Smoked cannabis eased pain induced in healthy volunteers, according to a study by researchers at the University of California, San Diego (UCSD) Center for Medical Cannabis Research (CMCR.) However, the researchers found that less may be more.”

“The results, showing a medium-dose (4% THC by weight) of cannabis to be an effective analgesic, converged with results from the CMCR’s first published study, a paper by UCSF researcher Donald Abrams, M.D. published in the journal Neurology in February 2007. In that randomized placebo-controlled trial, patients smoking the same dose of cannabis experienced a 34% reduction in HIV-associated sensory neuropathy pain—twice the rate experienced by patients receiving a placebo.”

““This study helps to build a case that cannabis does have therapeutic value at a medium-dose level,” said Grant. “It also suggests that higher doses aren’t necessarily better in certain situations – something also observed with other medications, such as antidepressants.””

Read more: http://phys.org/news112456382.html

“Smoked Cannabis Proven Effective In Treating Neuropathic Pain”  https://www.sciencedaily.com/releases/2007/10/071024141745.htm

“Smoked cannabis proven effective in treating neuropathic pain”  https://medicalxpress.com/news/2007-10-cannabis-proven-effective-neuropathic-pain.html

“Smoked Cannabis Proven Effective in Treating Neuropathic Pain”  https://health.ucsd.edu/news/2007/pages/10-24-medical-cannabis.aspx

Smoked Medical Cannabis May Be Beneficial as Treatment for Chronic Neuropathic Pain, Study Suggests.

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“Medicinal marijuana. A new study provides evidence that cannabis may offer relief to patients suffering from chronic neuropathic pain. (Credit: iStockphoto)”
 

“The medicinal use of cannabis has been debated by clinicians, researchers, legislators and the public at large for many years as an alternative to standard pharmaceutical treatments for pain, which may not always be effective and may have unwanted side effects. A new study by McGill University Health Centre (MUHC) and McGill University researchers provides evidence that cannabis may offer relief to patients suffering from chronic neuropathic pain.”

“This is the first trial to be conducted where patients have been allowed to smoke cannabis at home and to monitor their responses, daily,” says Dr. Mark Ware, lead author of the study, who is also Director of Clinical Research at the Alan Edwards Pain Management Unit at the MUHC and an assistant professor of anesthesia in McGill University’s Faculty of Medicine, and neuroscience researcher at the Research Institute of the MUHC.

In this study, low doses (25mg) of inhaled cannabis containing approximately 10% THC (the active ingredient in cannabis), smoked as a single inhalation using a pipe three times daily over a period of five days, offered modest pain reduction in patients suffering from chronic neuropathic pain (pain associated with nerve injury) within the first few days. The results also suggest that cannabis improved moods and helped patients sleep better. The effects were less pronounced in cannabis strains containing less than 10% THC.

“The patients we followed suffered from pain caused by injuries to the nervous system from post-traumatic (e.g. traffic accidents) or post-surgical (e.g. cut nerves) events, and which was not controlled using standard therapies” explains Dr. Ware. “This kind of pain occurs more frequently than many people recognize, and there are few effective treatments available. For these patients, medical cannabis is sometimes seen as their last hope.”

“This study marks an important step forward because it demonstrates the analgesic effects of cannabis at a low dose over a shot period of time for patients suffering from chronic neuropathic pain,” adds Dr. Ware. The study used herbal cannabis from Prairie Plant Systems (under contract to Health Canada to provide cannabis for research and medical purposes), and a 0% THC ‘placebo’ cannabis from the USA.”

Read more:http://www.sciencedaily.com/releases/2010/08/100830094926.htm

Marijuana May Be Effective For Neuropathic Pain.

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“The growing body of evidence that marijuana (cannabis) may be effective as a pain reliever has been expanded with publication of a new study in The Journal of Pain reporting that patients with nerve pain showed reduced pain intensity from smoking marijuana.

Researchers at University of California Davis examined whether marijuana produces analgesia for patients with neuropathic pain. Thirty-eight patients were examined. They were given either high-dose (7%), low-dose (3.5%) or placebo cannabis.

The authors reported that identical levels of analgesia were produced at each cumulative dose level by both concentrations of the agent. As with opioids, cannabis does not rely on a relaxing or tranquilizing effect, but reduces the core component of nociception and the emotional aspect of the pain experience to an equal degree. There were undesirable consequences observed from cannabis smoking, such as feeing high or impaired, but they did not inhibit tolerability or cause anyone to withdraw from the study. In general, side effects and mood changes were inconsequential.

It was noted by the authors that since high and low dose cannabis produced equal analgesic efficacy, a case could be made for testing lower concentrations to determine if the analgesic profile can be maintained while reducing potential cognitive decline.

In addition, the authors said further research could probe whether adding the lowest effective dose of cannabis to another analgesic drug might lead to more effective neuropathic pain treatment for patients who otherwise are treatment-resistant.”

http://www.sciencedaily.com/releases/2008/06/080626150628.htm

Marijuana Eases Chronic Pain, Researchers Say – ABC News

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“Smoking marijuana modestly reduced pain and other symptoms of chronic neuropathic pain, results of a small trial showed.

The most potent dose used reduced average daily pain scores by 0.7 points on an 11-point scale, according to Mark A. Ware of McGill University in Montreal, Canada and colleagues.

Those who smoked weed with 9.4 percent of the active ingredient tetrahydrocannabinol (THC) also reported sleeping better, the researchers reported online in CMAJ.”

Read more: http://abcnews.go.com/Health/PainManagement/smoking-marijuana-ease-chronic-pain-researchers/story?id=11515566

Marijuana may relieve nerve pain when other drugs don’t – USAToday

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“Smoking cannabis, also known as marijuana, reduced pain in patients with nerve pain stemming from injuries or surgical complications, new research shows.

Twenty-one adults with chronic nerve pain were taught to take a single inhalation of 25 milligrams of cannabis through a pipe, three times a day, for five days. The cannabis contained one of three levels of potency of tetrahydrocannabinol (THC), the active ingredient in marijuana, as well as a placebo dosage containing no THC.

All of the patients rotated through each of the four dosages, with nine days of no smoking in between.

Patients smoking the highest potency marijuana (9.4%) reported less pain than those smoking samples containing no THC. Patients also reported better sleep and less anxiety, according to the Canadian study. 

On an 11-point scale, the average daily pain intensity was 6.1 for those smoking 9.4% THC concentration, compared to 5.4 for those smoking cannabis containing no THC.

“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.”

Read more: http://usatoday30.usatoday.com/yourlife/health/medical/2010-09-05-marijuana-pain_N.htm

Medicinal Marijuana Eases Neuropathic Pain in HIV – ABC News

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“(HealthDay News) — Medicinal marijuana helps relieve neuropathic pain in people with HIV, says a University of California, San Diego, School of Medicine study.

It included 28 HIV patients with neuropathic pain that wasn’t adequately controlled by opiates or other pain relievers. The researchers found that 46 percent of patients who smoked medicinal marijuana reported clinically meaningful pain relief, compared with 18 percent of those who smoked a placebo.

The study, published online Aug. 6 in Neuropsychopharmacology, was sponsored by the University of California Center for Medical Cannabis Research (CMCR).

“Neuropathy is a chronic and significant problem in HIV patients as there are few existing treatments that offer adequate pain management to sufferers,” study leader Dr. Ronald J. Ellis, an associate professor of neurosciences, said in an UCSD news release. “We found that smoked cannabis was generally well-tolerated and effective when added to the patient’s existing pain medication, resulting in increased pain relief.”

The findings are consistent with and extend other recent CMCR-sponsored research supporting the short-term effectiveness of medicinal marijuana in treating neuropathic pain.

“This study adds to a growing body of evidence that indicates that cannabis is effective, in the short-term at least, in the management of neuropathic pain,” Dr. Igor Grant, a professor of psychiatry and director of the CMCR, said in the UCSD news release.”

http://abcnews.go.com/Health/Healthday/story?id=5528635&page=1

Self-medication of a cannabinoid CB2 agonist in an animal model of neuropathic pain.

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“Neuropathic pain is caused by injury to the peripheral or central nervous system (CNS)…”

“…novel approaches for identifying safe and effective analgesics with limited abuse liability are necessary.”

“Cannabinoids share the same target as the psychoactive ingredient in maijuana. Cannabinoids suppress neuropathic nociception through CB1 and CB2 mechanisms. CB1 is predominantly located within the CNS… CB2 activation is not associated with CNS side-effects linked to CB1. However, abuse potential of CB2 agonists is unknown.”

“We used a drug self-administration approach to ask whether rats with a spared nerve injury (SNI) would self-medicate with a CB2 agonist to attenuate a neuropathic pain state…”

 “Our results suggest that cannabinoid CB2 agonists may be exploited to treat neuropathic pain with limited drug abuse liability and central nervous system (CNS) side-effects. These studies validate the use of drug self-administration methods for identifying nonpsychotropic analgesics possessing limited abuse potential…”

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3157548/