Veterans Say Cannabis Reduces Drug Use and Improves Quality of Life

By Pat Anson, PNN Editor

The U.S. Department of Veterans Affairs (VA) and the Department of Defense (DoD) have long taken a dim view of medical cannabis. VA providers are not allowed to recommend or prescribe cannabis, and veterans who admit using cannabis will have it recorded in their VA medical records, which could potentially lead to drug testing or “adjustments” in their treatment plans.

Despite those barriers, cannabis use among U.S. military veterans is growing. In a 2019-2020 survey, nearly 12% of veterans reported using cannabis, with younger veterans (20.2%) and those with psychiatric conditions (24%) even more likely to be cannabis users.

A new study helps explain the popularity of cannabis among veterans. In an anonymous survey of 510 veterans who use medical cannabis, 91 percent said it improved their quality of life and nearly half said it helped them reduce their use of over-the-counter and prescription drugs, including opioids, anti-depressants, muscle relaxers and anti-inflammatory medication.

Veterans who were Black, female, served in combat, and those with chronic pain were most likely to report a desire to reduce their use of “unwanted” medications.

“Many of the respondents reported that medicinal cannabis treatment helped them to experience a greater quality of life, fewer psychological symptoms, fewer physical symptoms, and to use less alcohol, fewer medications, less tobacco, and fewer opioids,” researchers reported in the journal Clinical Therapeutics.

“These findings should inform clinicians who work with the veteran population, as cannabis may be an effective means of helping veterans, especially women and racially minoritized members of this population, to reduce unwanted medication use.”

Previous research has suggested that medical cannabis may play a “harm reduction role” by helping people reduce or even stop their use of opioid pain medication. But a recent study found otherwise. In an analysis of prescription data for over 150,000 chronic pain patients, researchers found that opioid prescribing declined only slightly in states after medical marijuana was legalized.

The VA is also holding the line against using cannabis as a treatment for post-traumatic stress disorder (PTSD).  While many veterans use cannabis to relieve symptoms of PTSD and several states consider PTSD an approved use of medical cannabis, the VA maintains that “cannabis can be harmful,” especially when used long-term, and is “not recommended for the treatment of PTSD.”

Medical Marijuana Laws Had Little Impact on Opioid Prescribing

By Pat Anson, PNN Editor

The cannabis industry and advocates in the U.S. have long claimed that state laws legalizing medical marijuana could help solve the opioid crisis by reducing demand for prescription opioids.

Various studies have suggested that may be true, like a recent one in New York state that found patients on high-dose opioids significantly reduced their opioid use once they started using medical cannabis. A similar study in 2021 found that cannabis was so effective in reducing chronic pain that most patients were able to reduce or completely stop their use of opioids.

But a large new study of commercially insured adults with chronic non-cancer pain found that the legalization of medical cannabis in 12 states (Arkansas, Connecticut, Florida, Louisiana, Maryland, Minnesota, North Dakota, New Hampshire, New York, Oklahoma, Ohio, Pennsylvania) had little to no effect on opioid prescribing.  

“Some research suggests that perhaps medical cannabis laws reduce opioid prescribing for chronic non-cancer pain because some people may substitute cannabis,” said lead author Beth McGinty, PhD, chief of the Division of Health Policy and Economics at Weill Cornell Medicine. “We found no effects of these laws on opioid prescribing or any types of treatment for chronic non-cancer pain that we looked at.”

McGinty and her colleagues looked at prescription data for over 150,000 chronic pain patients in the four years prior to state legalization and compared it to their medication use in the three years after medical marijuana laws were adopted. That data was then compared to prescription data for over 430,000 pain patients in 17 other states without medical marijuana laws, who served as a control group   

The study findings, published in Annals of Internal Medicine, show that opioid prescribing for chronic pain fell only slightly in states with medical marijuana laws, leading to tiny decreases in the average supply of opioids (0.35 fewer days) and for daily doses in morphine milligram equivalents (0.42 less MME). Small reductions were also noted in the prescribing of non-opioid pain relievers and in treatments such as physical therapy.

Importantly, the decreases were not substantially different than the data from states where medical marijuana remained illegal.

“Medical cannabis laws do not appear to be associated with changes in the prescription opioid or other non-cannabis, non-opioid treatments for chronic non-cancer pain,” McGinty said. “Policy makers trying to curb excess opioid prescribing and overdoses should focus on other strategies.”

Researchers say the minimal impact of medical cannabis on opioid prescribing may be due to the slow implementation of medical marijuana laws. Surveys show that most doctors are reluctant to discuss cannabis with their patients, and have doubts about its safety and effectiveness.

Doctors may not approve, but nearly a third of U.S. adults with chronic pain have used cannabis as a pain reliever and over half of them have reduced their use of pain medication. Many had no choice but to look for alternatives. Nationwide, opioid prescribing for commercially insured adults has fallen by 51% since 2011.

Primary Care Providers Still Reluctant to Talk About CBD

By Pat Anson, PNN Editor

Edibles, beverages and other products made with cannabidiol (CBD) went mainstream years ago, as public attitudes about cannabis changed and retailers discovered there was a growing market for CBD products.

The same is not true for primary care providers, according to a new survey that found most doctors are still reluctant to recommend CBD to their patients because of doubts about its safety and effectiveness. CBD is a chemical compound in marijuana that does not produce euphoria, but is believed to reduce pain and improve other health conditions.  

In the online survey of 236 primary care providers (PCPs) affiliated with the Mayo Clinic Healthcare Network in Minnesota, Wisconsin, Florida and Arizona, doctors said CBD was frequently brought up during medical appointments, usually by patients. But those conversations didn’t last long, because most PCPs don’t feel they have enough knowledge about CBD and are skeptical about CBD marketing claims.

PCPs in states where marijuana is legal are more receptive to patients using CBD products, while PCPs in states where marijuana is still illegal are more concerned about CBD’s side effects. But regardless of its legal status, most PCPs believe CBD is ineffective for most conditions for which it is marketed, with chronic non-cancer pain and anxiety/stress being the exceptions.

“Results from this mixed methods study show that PCPs practicing in the U.S. rarely screen for or discuss CBD use with their patients and report several barriers to engage in proactive CBD-focused practice behaviors,” wrote lead author Pravesh Sharma, MD, a pediatric psychiatrist and substance use researcher at Mayo Clinic Health System.

In a second, much smaller study, Sharma and his colleagues conducted interviews with 14 PCPs and found a number of barriers that prevent an open dialogue about CBD, including lack of time, discomfort, low-quality evidence, and CBD being a low priority.

“Our study is the first in-depth report on PCP attitudes, experiences, and practice behaviors related to CBD. The findings of our study have the potential to significantly impact future PCP practice behaviors,” they concluded.

The U.S. market for legal cannabis has grown into a $29.6 billion industry, but not much has changed over the years in terms of its acceptance in the medical community. In a 2020 survey of over 1,000 primary care patients in Vermont, only 18% rated their doctor as a good source of information about cannabis. Nearly half of the patients surveyed had used cannabis in the last year, and most of them thought cannabis was helpful for pain, anxiety, depression, arthritis, sleep and nausea.

The effectiveness of CBD is somewhat murky, because CBD products are poorly regulated and vary so much in dose, quality and whether they also have THC. While CBD may be effective temporarily in relieving pain and other symptoms, some researchers are concerned about its long-term effects on children and adolescents.  

“In fact, although CBD is widely available as an unregulated supplement, we researchers know almost nothing about its effects on the developing brain. Of note, these harms apply not only to smoking, but also to ingesting, vaping or other ways of consuming cannabis or its extracts,” Hilary Marusak, PhD, a psychiatry professor at Wayne State University, said in a recent column.

“In my view, it’s important that consumers know these risks and recognize that not everything claimed in a label is backed by science. So before you pick up that edible or vape pen for stress, anxiety, or sleep or pain control, it’s important to talk to a health care provider about potential risks.”

Unfortunately, asking a doctor may not provide many answers.

Medical Cannabis Effective but Expensive for New Zealanders

By Pat Anson, PNN Editor

Medical cannabis is very effective at relieving pain, improving sleep and reducing anxiety, according to researchers in New Zealand, who say government policies need to change to make cannabis cheaper and more accessible to Kiwis.

Researchers at the University of Otago, Victoria University and the University of Auckland surveyed and conducted interviews with 213 people who had prescriptions for cannabis under New Zealand’s medical cannabis program. Participants were asked about the quality of cannabis products they used and their effectiveness.

The study findings, published in the journal Drugs, Habits and Social Policy, show that nearly 96% reported that cannabis helped them with their medical conditions. Almost half (49%) said they were able to reduce or stop taking prescription drugs.

The most common therapeutic use of medical cannabis was pain relief and 96% of participants said it helped reduce their pain. Cannabis also helped users who had difficulty sleeping (97%) and those with mental health issues (98%).

Of the participants who took cannabis for other reasons, such as autism, attention deficit hyperactivity disorder, post-traumatic stress disorder, and difficulty eating, 98% found cannabis helpful.

"An important finding of the study was that participants either decreased or stopped their use of prescribed medicines, many of which were opioid based," said co-author Geoff Noller, PhD, a Research Fellow at Otago University's Dunedin School of Medicine. "This both reinforces that they experienced some actual effect from using cannabis in that they ceased or decreased other medications with recognized efficacy, and in the case of many of these other medications, they reduced their use of potentially more problematic medications.

"There is a place for both approaches, with the results of this study suggesting that cannabis products could have a role in treating patients with chronic pain and other conditions refractory to treatment by conventional means."

But many New Zealanders find medical cannabis difficult to obtain and rely on the black market. A recent study by the NZ Drug Foundation estimated that while over a quarter of a million Kiwis use cannabis for medical reasons, only 6% -- about 17,000 people -- obtained cannabis with a prescription.

Many doctors won’t prescribe medical cannabis and there are a limited number of products on the market, keeping prices high. The Foundation said CBD oil can cost a patient $150-350 per month, with other cannabis products costing even more.

"At present, current regulations appear to be creating problems for many New Zealanders who otherwise report positive benefits from their use of medicinal cannabis,” says Noller. "Specific barriers include cost, with currently available medicinal cannabis products being too expensive for many New Zealanders due to the compliance costs of production imposed by regulations, and also the lack of knowledge about it for physicians, leading to a reluctance to prescribe, in many cases."

To obtain medical cannabis, New Zealanders need a prescription from a doctor that spells out what cannabis products can be used and the amount. Medical cannabis can only be obtained legally from a doctor or pharmacy, although many Kiwis use a “Green Fairy” – a person who provides cannabis for a nominal fee.

Cannabis Study Finds ‘Significant Improvements’ in Physical and Mental Health

By Pat Anson, PNN Editor

The use of medical cannabis was associated with “significant improvements” in physical and mental health in a large survey of Australian adults suffering from chronic pain and other health problems.

Over 3,100 people participated in the survey. Chronic non-cancer pain was the most common condition reported (68.6%), followed by cancer pain (6%), insomnia (4.8%) and anxiety (4.2%).  

Australia has relatively stringent rules for medical cannabis. Patients have to exhaust all other forms of treatment and consult with a physician, who reviews their medical history and suitability for cannabis before writing a prescription.

Most of the prescriptions for survey participants were for cannabis products taken orally, such as oils and capsules, with only a small number for dried cannabis flower. About 80% of the cannabis products were rich in cannabidiol (CBD), with the rest dominant in tetrahydrocannabinol (THC) or a balanced mix of CBD and THC.

Patients were asked to rate their wellness and quality of life in eight categories on a scale of 0-100, including general health, body pain, physical functioning, physical limitations, mental health, emotional limitations, social functioning and vitality. The surveys were conducted at the start of the study and then every 45 days after cannabis therapy was initiated, with a total of 15 follow up surveys.   

The study findings, recently published in JAMA Network Open, showed sustained improvement in all eight wellness categories after participants started taking cannabis, with body pain improving an average of 10 to 15 points on the 100-point scale. Researchers also found “pronounced and statistically significant improvements” in mental, social and emotional health.

“This study suggests a favorable association between medical cannabis treatment and quality of life among patients with a diverse range of conditions. However, clinical evidence for cannabinoid efficacy remains limited, and further high-quality trials are required,” wrote lead author Thomas Arkell, PhD, a psychopharmacologist at the Swinburne University of Technology in Melbourne.

Adverse events such as sleepiness and dry mouth were relatively common during cannabis therapy, but were usually mild or moderate.

Before starting cannabis therapy, patients were taking an average of nearly five medications a day, the most common being simple analgesics (54%), opioids (48%), antidepressants (45%), benzodiazepines (34%) and gabapentinoids (22%). The study did not examine if medication use declined once participants started taking cannabis.  

“While we cannot exclude the possibility that adverse events may have been caused in whole or part by the disease state and concomitant medications, the relatively high incidence of adverse events still affirms the need for caution with THC prescribing and careful identification of patients with contraindications,” Arkell wrote.

Medical cannabis was legalized in Australia in 2016. Since then, over 332,000 Australians have been given cannabis prescriptions, mostly for chronic pain (55%), anxiety (23%) and sleep disorders (6%).

Pain management experts in Australia have long taken a dim view of cannabis. In 2021, the Australian and New Zealand College of Anaesthetists released new guidance urging doctors not to prescribe medical cannabis for chronic non-cancer pain because of a lack of good quality research.

Cannabis Helps Relieve Cancer Pain

By Pat Anson, PNN Editor

Good news for patients suffering from cancer pain or side effects from cancer treatment. Two new studies found that medical cannabis helps relieve cancer pain, and offer some lessons to non-cancer patients about which cannabis products might work best for them.

The first study involved 358 adult cancer patients enrolled in a cannabis registry created by the Quebec Medical College. The patients were being treated for a variety of different cancers and were referred to the registry by their doctors. The primary complaint of most was pain (72%), with others experiencing symptoms such as nausea, anorexia, weight loss, anxiety and insomnia.

Participants were assigned to one of three groups, using cannabis products that were high in tetrahydrocannabinol (THC), high in cannabidiol (CBD), or a balanced blend of THC and CBD. The cannabis was ingested orally, through inhalation or a combination of the two. Patients were monitored and assessed every three months for a year.

The study findings, published in the journal BMJ Supportive & Palliative Care, show that pain levels dropped significantly after 3, 6 and 9 months, with pain slightly worsening after 12 months. Patients using balanced THC-CBD products reported the most pain relief, and many were able to reduce their use of opioids and other medications.

A small percentage of patients suffered adverse events from cannabis, such as sleepiness, dizziness and fatigue. Only 5 patients had side effects so severe that they stopped using cannabis.

Researchers concluded that medical cannabis should have a role as a complimentary pain management option in cancer patients who don’t get adequate relief from conventional analgesics.

“We found MC (medical cannabis) to be a safe and effective treatment option to help with cancer pain relief. THC:CBD balanced products appear to perform better as compared with THC-dominant and CBD-dominant products. Furthermore, we observed consistent decreases in medication burden and opioid use in our patient population,” researchers said.

Less Pain = Better Cognition

The second study, by researchers at University of Colorado Boulder, involved 25 cancer patients being treated by oncologists at the CU Anschutz Medical Campus. The patients’ pain levels, sleep patterns, cognition and reaction times were assessed at the start of the study; and they were asked to select edible products from a cannabis dispensary, such as chocolates, gummies, tinctures and baked goods containing different ratios of THC and CBD.

After just two weeks of regular use, patients reported less pain, better sleep, and the unexpected benefit of improved cognition – they were able to think more clearly.

“When you’re in a lot of pain, it’s hard to think,” said senior author and cancer survivor Angela Bryan, PhD, a professor of psychology and neuroscience at CU Boulder. “We found that when patients’ pain levels came down after using cannabis for a while, their cognition got better.”

The improved cognition didn’t happen right away. Patients who used edibles rich in THC got high from it and their cognition initially decreased. But after a few days of regular cannabis consumption, a new pattern emerged. Patients reported improvements in pain, sleep and cognitive function, including reaction times.

“We thought we might see some problems with cognitive function,” said Bryan. “But people actually felt like they were thinking more clearly.”

Patients who ingested edibles high in CBD reported bigger improvements in sleep quality and pain intensity.

Bryan’s study, published in the journal Exploration in Medicine, is one of the first to assess the efficacy of cannabis purchased at dispensaries — rather than less potent government supplied cannabis or synthetic cannabis medications that are primarily used to treat nausea.

Bryan had just begun studying medical cannabis in 2017, when she was diagnosed with breast cancer. After surgery and chemotherapy, she looked to cannabis for pain relief as an alternative to opioids. Neuropathic pain is a common side effect from chemotherapy.

Bryan used her own customized regimen of potent THC products when pain was intense and took mostly CBD products when the pain was more manageable. She was not completely pain-free, but she didn’t take a single opioid during treatment. She hopes others will learn from her experience.

“I was extremely lucky because I had some knowledge about this. Most patients don’t,” Bryan said. “People are open to trying whatever they think might be useful, but there's just not much data out there to guide them on what works best for what.”

As many as 40% of U.S. cancer patients use cannabis, but only a third of doctors feel comfortable advising them about it.

Melatonin and Cannabis Products Often Mislabeled

By Pat Anson, PNN Editor

If you use cannabis for pain relief or take melatonin to help you sleep at night, you may want to check the label and ask the manufacturer just how accurate the list of ingredients is.  Or think twice before buying it.

Two more studies are raising doubts about the accuracy of label claims on cannabis products and melatonin supplements, which are often marketed with unsupported claims about their health benefits.

In the first study, published this week in JAMA, researchers analyzed 25 melatonin gummy products, including 5 gummies that also contained cannabidiol (CBD). Melatonin is a natural hormone produced by the brain at night to help induce sleep. Supplements containing synthetic melatonin and/or CBD are often marketed as products that improve sleep, reduce anxiety, and promote relaxation.

Researchers found that only 3 of the 25 gummies contained enough melatonin to be within 10% of the labeled amount – with one product containing 347% more melatonin than what was listed, a potentially dangerous amount. Another gummy contained no melatonin at all, just CBD.

“The great majority of melatonin gummy products were inaccurately labeled, with most products exceeding the declared amount of melatonin and CBD,” wrote lead author Pieter Cohen, MD, an associate professor at Harvard Medical School and an internist at Cambridge Health Alliance. “Given these findings, clinicians should advise parents that pediatric use of melatonin gummies may result in ingestion of unpredictable quantities of melatonin and CBD.”

Pediatric use is concerning because calls to U.S. Poison Control Centers about children ingesting melatonin have increased five-fold over the past decade, resulting in nearly 28,000 emergency room visits, over 4,000 hospitalizations and two deaths.

Researchers say it takes just 0.1 mg to 0.3 mg of melatonin to increase plasma levels beyond the normal nighttime range in young adults. The amount of melatonin found in the gummies was much higher, including one product containing 13.1 mg of melatonin.

“Consuming melatonin gummies as directed could expose children to between 40 and 130 times higher quantities of melatonin,” they said. “With respect to CBD, the drug is FDA approved to treat refractory seizures caused by 3 rare genetic disorders, but the FDA has not approved the use of CBD for any indication in healthy children.”

The JAMA report is believed to be the first U.S. study to quantify the amount of melatonin in over-the-counter supplements. A 2017 Canadian analysis of melatonin products had similar findings, with the actual dose of melatonin ranging from 17% to 478% of the amount listed on the label. Neither the U.S. or Canadian studies identified the melatonin brands that were tested.

Too Little THC

It wasn’t too much, but too little tetrahydrocannabinol (THC) that University of Northern Colorado researchers found in 23 cannabis flower products purchased at state-licensed dispensaries. The study findings, recently published in the journal PLOS One, show that nearly 70% of the flower samples had THC levels at least 15% lower than what was listed on their labels.

Inaccurate labeling has long been a problem in the cannabis industry. Some growers and merchants resort to “lab shopping” to seek out product testing laboratories that generate the most desirable results – which means inflated levels of THC.  There’s a financial incentive to do so, because cannabis products containing high amounts of THC usually sell at a higher price.

One of the flower samples, purchased at a Denver dispensary and sold under the brand name “OG Kush 2,” had only half the amount of THC listed on its label.  

“Given our results it is urgent that steps are taken to increase label accuracy of Cannabis being sold to the public. The lack of accurate reporting of THC potency can have impacts on medical patients controlling dosage, recreational consumers expecting an effect aligned with price, and trust in the industry as a whole,” researchers said.

“Although we have no power to change the current system, we hope highlighting this issue and educating consumers will affect the change needed to remedy inflated potency of flower products. Addressing this discrepancy will require both changes to the regulatory system and consumer awareness that reported THC potencies are frequently inflated.”

Although 38 states and Washington DC have legalized medical or recreational cannabis, there is little consistency in labeling, regulating or testing cannabis. The researchers called for more regulatory oversight of cannabis and standardized testing protocols.

UK Study Shows Chronic Pain Patients Benefit from Cannabis

By Pat Anson, PNN Editor

Chronic pain patients who used a variety of cannabis products experienced less pain, better sleep and improved quality of life, according to a new UK study that found the most improvement in patients who used oil-based cannabis products.

Researchers at Imperial College London assessed the safety and efficacy of cannabis in over 700 pain patients enrolled in the UK Medical Cannabis Registry. Participants were divided into three groups that used either oil-based cannabis, smoked or vaporized dried flowers, or a combination of both (CBMP) for six months. The oil-based products included extracts, lozenges and capsules.

The study findings, published in the journal Expert Review of Neurotherapeutics, show symptom improvement in all three groups, with patients using cannabis oil either alone or in combination with dried flower reporting the most improvement.

Researchers think the CBMP group derived the most benefit because the cannabis was ingested through two different administrative routes, one absorbed straight into the blood stream through inhaling (dried flowers) and the other slowly absorbed through the digestive system (oil-based cannabis).

“The findings in this study demonstrate treatment with oil-based, dried flowers, or a combination of both CBMPs are associated with statistically significant improvements in pain relief and sleep quality after 6 months in chronic pain patients,” researchers reported.

“Additionally, patients prescribed oils or both types of CBMPs experienced reduced anxiety and an improvement in their ability to perform daily activities. Patients prescribed a combination of both CBMPs recorded improvements in their self-care and mobility abilities. Collectively, this evidence signals that initiation of CBMP treatment is associated with improved HRQoL (health related quality of life).

In addition to symptom improvement, participants in the CBMP group reported a small reduction (3.28%) in their use of opioid analgesics.

About one in every four patients had an adverse side effect, such as fatigue, somnolence and dry mouth. Adverse events were more common in females, former cannabis users and cannabis naïve (new) users.  

A previous study of patients enrolled in the UK Medical Cannabis Registry found significant improvement in their pain, discomfort and sleep quality after using cannabis oil.

A recent survey of U.S. adults with chronic pain found that nearly a third have used cannabis for pain relief. Over half of those who used cannabis said it also enabled them to decrease their use of opioids and other pain medications.

More States Should Require Insurers to Pay for Medical Cannabis

By Paul Armentano, Guest Columnist

Should health insurance programs reimburse patients for their use of medical cannabis products? In a growing number of states, the courts are saying “yes.”

In the most recent example, a Pennsylvania Appellate Court ruled that workers’ compensation plans must cover cannabis-related expenditures when an employee uses it to recover from a workplace-related injury. The court ruled that employees in Pennsylvania possess “a statutory right” to be reimbursed for medical marijuana expenses that are reasonable and necessary to treat a work injury.  

“The MMA (Pennsylvania Medical Marijuana Act) specifically mandates that no medical marijuana patients be denied any rights for (the) lawful use of medical marijuana,” the Court said.

The Pennsylvania Court is not the first to issue an affirmative verdict in this matter. Courts in several states, including Connecticut, New Hampshire, New Jersey, New Mexico and New York, have provided similar opinions – determining that the denial of compensation claims would be antithetical to the legislatures’ express findings that cannabis is a state-legal therapy.

By contrast, courts in some other states, including Minnesota, have issued contradictory opinions – finding that it would be inappropriate for insurers to reimburse claimants for their use of a federally illegal substance. Federal law still classifies marijuana as a Schedule I controlled substance, placing it in the same legal category as heroin.

In most states, however, the law is largely silent on the issue. But don’t expect that to be the case for much longer. As scientific consensus and public attitudes surrounding the safety and efficacy of medical cannabis continue to evolve, the way insurers approach patients’ use of marijuana is likely to change too.

For example, lawmakers in Massachusetts recently introduced legislation explicitly providing that injured employees be reimbursed for their medical marijuana-related costs. In New York, lawmakers just advanced legislation, A. 4713, requiring public insurance plans to treat medical cannabis like any other medication. 

Thirty-eight states and the District of Columbia currently regulate the production and dispensing of cannabis for medical purposes. No state government has ever repealed or even rolled back these laws. That’s because these policies are widely accepted among both the public and among health professionals.

In fact, according to nationwide survey data recently compiled by the Centers for Disease Control and Prevention, over two-thirds of practicing physicians acknowledge the efficacy of medical cannabis and over one-quarter say that they have recommended it to their patients. 

Tens of millions of Americans are now using cannabis therapeutically. The number has doubled over the past decade, as peer-reviewed data that support the use of medical cannabis for the treatment of pain, multiple sclerosis, and other ailments has continued to grow. In many instances, patients are replacing their use of opioids, benzodiazepines and other prescription medications with cannabis because they find it more effective and with fewer adverse side effects. 

In short, most patients, most physicians, and most state laws view cannabis as a legitimate therapeutic option. Therefore, the millions of Americans who rely upon medical cannabis products ought to be afforded the same entitlements as those who use other conventional medications and therapies. Those privileges should include insurance-provided reimbursement for medical cannabis treatment.  

State legislators ought to see to it that this is a right provided for and protected in jurisdictions where medical marijuana is legally available under the law. 

Paul Armentano is the Deputy Director for NORML, the National Organization for the Reform of Marijuana Laws.

Is Cannabis Harmful During Pregnancy and Adolescence?

By Hilary Marusak, Wayne State University

Cannabis is a widely used psychoactive drug worldwide, and its popularity is growing: The U.S. market for recreational cannabis sales could surpass $72 billion by 2023.

As of early 2023, 21 U.S. states and the District of Columbia have legalized cannabis for recreational use for people age 21 and up, while 39 states plus the District of Columbia have legalized it for medical use.

The growing wave of legalization and the dramatic increase in cannabis potency over the past two decades have raised concerns among scientists and public health experts about the potential health effects of cannabis use during pregnancy and other vulnerable periods of development, such as the teen years.

I am a developmental neuroscientist specializing in studying what’s known as the endocannabinoid system. This is an evolutionarily ancient system found in humans and other vertebrates that produces natural cannabinoids such as THC and CBD.

Cannabis and its constituents interact with the body’s endocannabinoid system to product their effects. THC and CBD are the most commonly known cannabis extracts and can be synthesized in a lab. My lab also studies the risks versus potential therapeutic value of cannabis and cannabinoids.

Potential Health Risks

People often assume there’s no risk when using cannabis or cannabinoids during vulnerable periods of life, but they’re basing that on little to no data. Our research and that of others suggests that cannabis use during pregnancy and adolescence can present myriad health risks the public should be aware of.

Data shows that many people who use cannabis continue to do so during pregnancy. But there are health risks. More and more pregnant people are using cannabis today compared with a decade ago, with some studies showing that nearly 1 in 4 pregnant adolescents report that they use cannabis.

Many cannabis-using people may have not known they were pregnant and stopped using when they found out. Others report using cannabis for its touted ability to ease pregnancy-related symptoms, like nausea and anxiety. However, studies do not yet confirm those health claims. What’s more, the potential harms are often downplayed by pro-cannabis marketing and messaging by dispensaries, advocacy groups and even midwives or doulas.

In addition, physicians and other health care providers often are not knowledgeable enough or don’t feel well equipped to discuss the potential risks and benefits of cannabis with their patients, including during pregnancy.

While research shows that most people who are pregnant perceive little to no risk in using cannabis during pregnancy, the data show there is clear cause for concern. Indeed, a growing number of studies link prenatal cannabis exposure to greater risk of preterm birth, lower birth weight and psychiatric and behavioral problems in children. These include, for example, difficulties with attention, thought, social problems, anxiety and depression.

Cannabis and Brain Development

When cannabis is inhaled, consumed orally or taken in through other routes, it can easily cross through the placenta and deposit in the fetal brain, disrupting brain development.

A recent study from my lab, led by medical student Mohammed Faraj, found that cannabis use during pregnancy can shape the developing brain in ways that are detectable even a decade later.

We used data from the National Institutes of Health Adolescent Brain Cognitive Development Study, which is the largest long-term study of brain development and child and adolescent health in the U.S. It has followed more than 10,000 children and their families from age 9-10 over a 10-year period.

Through that analysis, we linked prenatal cannabis exposure to alterations in functional brain networks in 9- and 10-year-old children. In particular, prenatal cannabis exposure appeared to disrupt the communication between brain networks involved in attentional control, which may explain why children who were exposed to cannabis in utero may develop difficulties with attention or other behavioral issues or mental disorders as they develop.

While alcohol abuse has steadily declined among adolescents since 2000 in the U.S., cannabis use shows the opposite pattern: It increased by 245% during that same period.

Data reported in 2022 from the Monitoring the Future survey of over 50,000 students in the U.S. found that nearly one-third of 12th grade students reported using cannabis in the past year, including cannabis vaping. Yet only about 1 in 4 12th grade students perceive great harm in using cannabis regularly. This suggests that many teens use cannabis, but very few consider it to have potential negative effects.

Research shows that the adolescent brain is primed to engage in high-risk behaviors such as experimenting with cannabis and other substances. Unfortunately, owing to ongoing brain development, the adolescent brain is also particularly susceptible to the effects of cannabis and other substances. Indeed, many neuroscientists now agree that the brain continues to develop well into the second and even third decade of life.

In line with this vulnerability, research shows that, relative to those who did not use cannabis during adolescence, those who started using it during adolescence are at increased risk of developing depression, suicidal ideation, psychosis and reductions in IQ during adolescence and adulthood. Neuroimaging studies also show residual effects of adolescent cannabis use on brain functioning, even later during adulthood.

‘No Amount Is Safe’

Despite common misconceptions that cannabis is “all natural” and safe to use during pregnancy or adolescence, the data suggests there are real risks. In fact, in 2019, the U.S. surgeon general issued an advisory against the use of cannabis during pregnancy and adolescence, stating that “no amount … is known to be safe.”

Cannabis may be harmful to the developing brain because it disrupts the developing endocannabinoid system, which plays a critical role in shaping brain development from conception and into adulthood. This includes neural circuits involved in learning, memory, decision-making and emotion regulation.

While much of this research has focused on cannabis use, there is also other research that comes to similar conclusions for THC and CBD in other forms. In fact, although CBD is widely available as an unregulated supplement, we researchers know almost nothing about its effects on the developing brain. Of note, these harms apply not only to smoking, but also to ingesting, vaping or other ways of consuming cannabis or its extracts.

In my view, it’s important that consumers know these risks and recognize that not everything claimed in a label is backed by science. So before you pick up that edible or vape pen for stress, anxiety, or sleep or pain control, it’s important to talk to a health care provider about potential risks – especially if you are or could be pregnant or are a teen or young adult.

Hilary Marusak, PhD, is an Assistant Professor of Psychiatry and Behavioral Neurosciences at Wayne State University. She directs the WSU THINK Lab, which focuses on pediatric anxiety and understanding the impact of childhood trauma on neural development. Dr. Marusak receives funding from the National Institutes of Health and the State of Michigan.   

This article originally appeared in The Conversation and is republished with permission.

Our Bodies Produce Chemicals Similar to THC in Cannabis

By Drs. Prakash and Mitzi Nagarkatti, University of South Carolina

Over the past two decades, a great deal of attention has been given to marijuana – also known as pot or weed. As of early 2023, marijuana has been legalized for recreational use in 21 states and Washington, D.C., and the use of marijuana for medical purposes has grown significantly during the last 20 or so years.

But few people know that the human body naturally produces chemicals that are very similar to delta-9-tetrahydrocannabinol, or THC, the psychoactive compound in marijuana, which comes from the Cannabis sativa plant. These substances are called endocannabinoids, and they’re found across all vertebrate species.

Evolutionarily, the appearance of endocannabinoids in vertebrate animals predates that of Cannabis sativa by about 575 million years.

It is as if the human body has its own version of a marijuana seedling inside, constantly producing small amounts of endocannabinoids.

The similarity of endocannabinoids to THC, and their importance in maintaining human health, have raised significant interest among scientists to further study their role in health and disease, and potentially use them as therapeutic targets to treat human diseases.

THC was first identified in 1964, and is just one of more than 100 compounds found in marijuana that are called cannabinoids.

What Are Endocannabinoids?

Endocannabinoids were not discovered until 1992. Since then, research has revealed that they are critical for many important physiological functions that regulate human health. An imbalance in the production of endocannabinoids, or in the body’s responsiveness to them, can lead to major clinical disorders, including obesity as well as neurodegenerative, cardiovascular and inflammatory diseases.

We are immunologists who have been studying the effects of marijuana cannabinoids and vertebrate endocannabinoids on inflammation and cancer for more than two decades. Research in our laboratory has shown that endocannabinoids regulate inflammation and other immune functions.

A variety of tissues in the body, including brain, muscle, fatty tissue and immune cells, produce small quantities of endocannabinoids. There are two main types of endocannabinoids: anandamide, or AEA, and 2-arachidonoyl glycerol, known as 2-AG. Both of them can activate the body’s cannabinoid receptors, which receive and process chemical signals in cells.

One of these receptors, called CB1, is found predominantly in the brain. The other, called CB2, is found mainly in immune cells. It is primarily through the activation of these two receptors that endocannabinoids control many bodily functions.

The receptors can be compared to a “lock” and the endocannabinoids a “key” that can open the lock and gain entry into the cells. All these endocannabinoid receptors and molecules together are referred to as the endocannabinoid system.

The cannabis plant contains another compound called cannabidiol, or CBD, which has become popular for its medicinal properties. Unlike THC, CBD doesn’t have psychoactive properties because it does not activate CB1 receptors in the brain. Nor does it activate the CB2 receptors, meaning that its action on immune cells is independent of CB2 receptors.

Endocannabinoids Help Us Feel Better

The euphoric “high” feeling that people experience when using marijuana comes from THC activating the CB1 receptors in the brain.

But when endocannabinoids activate CB1 receptors, by comparison, they do not cause a marijuana high. One reason is that the body produces them in smaller quantities than the typical amount of THC in marijuana. The other is that certain enzymes break them down rapidly after they carry out their cellular functions.

However, there is growing evidence that certain activities may release mood-elevating endocannabinoids. Some research suggests that the relaxed, euphoric feeling you get after exercise, called a “runner’s high,” results from the release of endocannabinoids rather than from endorphins, as previously thought.

The endocannabinoids regulate several bodily functions such as sleep, mood, appetite, learning, memory, body temperature, pain, immune functions and fertility. They control some of these functions by regulating nerve cell signaling in the brain. Normally, nerve cells communicate with one another at junctions called synapses. The endocannabinoid system in the brain regulates this communication at synapses, which explains its ability to affect a wide array of bodily functions.

Research in our laboratory has shown that certain cells of the immune system produce endocannabinoids that can regulate inflammation and other immune functions through the activation of CB2 receptors.

In addition, we have shown that endocannabinoids are highly effective in lessening the debilitating effects of autoimmune diseases. These are diseases in which the immune system goes haywire and starts destroying the body’s organs and tissues. Examples include multiple sclerosis, lupus, hepatitis and arthritis.

Chronic Pain Linked to Low Levels of Endocannabinoids

Recent research suggests that migraine, fibromyalgia, irritable bowel syndrome, post-traumatic stress disorder and bipolar disease are all linked to low levels of endocannabinoids.

In a 2022 study, researchers found that a defect in a gene that helps produce endocannabinoids causes early onset of Parkinson’s disease. Another 2022 study linked the same gene defect to other neurological disorders, including developmental delay, poor muscle control and vision problems.

Other research has shown that people with a defective form of CB1 receptors experience increased pain sensitivity such as migraine headaches and suffer from sleep and memory disorders and anxiety.

We believe that the medicinal properties of THC may be linked to the molecule’s ability to compensate for a deficiency or defect in the production or functions of the endocannabinoids.

For example, scientists have found that people who experience certain types of chronic pain may have decreased production of endocannabinoids. People who consume marijuana for medicinal purposes report significant relief from pain. Because the THC in marijuana is the cannabinoid that reduces pain, it may be helping to compensate for the decreased production or functions of endocannabinoids in such patients.

Deciphering the role of endocannabinoids is still an emerging area of health research. Certainly much more research is needed to decipher their role in regulating different functions in the body.

In our view, it will also be important to continue to unravel the relationship between defects in the endocannabinoid system and the development of various diseases and clinical disorders. We think that the answers could hold great promise for the development of new therapies using the body’s own cannabinoids.

Prakash Nagarkatti, PhD, and Mitzi Nagarkatti, PhD, are Professors of Pathology, Microbiology and Immunology at the University of South Carolina. They receive funding from the National Science Foundation and the National Institutes of Health.

This article originally appeared in The Conversation and is republished with permission.

DEA Considers Synthetic THC Illegal

By Pat Anson, PNN Editor

The Drug Enforcement Administration considers a synthetic form of THC — the psychoactive compound in cannabis and hemp — a controlled substance that is illegal under federal law.

Hemp was legalized federally under the 2018 Farm Bill, in part because hemp contains only trace amounts of THC. However, some companies developed a synthetic form of hemp-derived THC — called THC acetate ester (THCO) — to give consumers an intoxicating effect. Because THCO was modeled after the THC found in hemp, they claimed it could be legally sold and consumed.

However, in a recent letter to Rod Kight, an attorney who specializes in cannabis law, the head of the DEA’s Drug & Chemical Evaluation Section said the agency considers delta-8 and delta-9 products containing THCO to be Schedule I controlled substances, which are illegal to sell or possess.

“Delta-9-THCO and delta-8-THCO do not occur naturally in the cannabis plant and can only be obtained synthetically, and therefore do not fall under the definition of hemp. Delta-9-THCO and delta-8-THCO are tetrahydrocannabinols having similar chemical structures and pharmacological activities to those contained in the cannabis plant,” the letter states.

Kight said he’s been telling clients and personal friends that THCO is potentially dangerous.

“Although I do not always agree with the DEA’s view on cannabis matters, I agree with this opinion and, frankly, am not surprised,” he wrote.  “It has always been my view that THCO is a controlled substance under federal law. Although it can be made from cannabinoids from hemp, THCO is not naturally expressed by the hemp plant. It is a laboratory creation that does not occur in nature, at least not from the hemp plant.”

As Kight points out in his blog, the DEA letter does not address delta-8 or delta-9 THC, which are natural and derived from hemp. Although those substances are considered legal at the federal level, over a dozen states have banned products containing them.

In states where they remain legal, delta-8 and 9 are widely available in candy, gummies, cookies, tinctures and beverages. Some companies claim the products have “uniquely potent effects on pain” and other health conditions, even while admitting there is little evidence to support those claims.

The FDA became so alarmed by the profusion of delta-8 and delta-9 THC products — and their marketing to children — that it sent letters to five companies in 2022 warning them to stop making unsubstantiated medical claims.

"These products often include claims that they treat or alleviate the side effects related to a wide variety of diseases or medical disorders, such as cancer, multiple sclerosis, chronic pain, nausea and anxiety," FDA Principal Deputy Commissioner Janet Woodcock, MD, said in a statement. "It is extremely troubling that some of the food products are packaged and labeled in ways that may appeal to children.”

The FDA says it had received over 100 reports of adverse events involving delta-8 THC, with poison control centers reporting over 2,300 cases, including one that involved the death of a child.

Florida Study Blames Cannabis for Hundreds of Deaths

By Pat Anson, PNN Editor

Advocates of medical marijuana – or cannabis use in general – have long said you can’t overdose on cannabis and that the natural plant is even “safer than many foods.”   

But researchers at Florida Atlantic University say cannabis products – particularly synthetic cannabis – are riskier than many people believe. In a study recently published in the Journal of Nursing Scholarship, they called cannabis “a legitimate public health concern” that has killed hundreds of Floridians in recent years.  

Analyzing 2014 to 2020 data from the Florida Department of Law Enforcement, researchers found that 386 people died as a result of drug intoxication caused by cannabis use. It’s important to note that the vast majority of those deaths (98.7%) involved accidents such as motor vehicle crashes, with a handful of deaths caused by murder or suicide. No overdoses were reported.

Most of the Florida deaths also involved other substances such as alcohol, opioids, heroin and cocaine. In nearly two-thirds of the deaths, synthetic cannabinoids such as K2 or Spice were involved. Synthetic cannabinoids are chemicals sprayed onto dried, shredded leaves that mimic the effect of cannabis, but are often quite stronger.  

“Synthetic cannabinoids are part of the new psychoactive substances that are two to 100 times more potent than THC, the main psychoactive compound in marijuana,” said lead author Armiel Suriaga, PhD, an assistant professor in FAU’s College of Nursing.

Suriaga and his colleagues found that over 13 percent of those who died had cardiac-related conditions such as high blood pressure, atherosclerosis, cardiac arrhythmias or an enlarged heart. There was one death from an ischemic stroke and one death from a hemorrhagic stroke, both related to synthetic cannabis use.

“The persistent deaths from cannabis and synthetic cannabis use are a legitimate public health concern,” said Suriaga. “The public should remain vigilant of the adverse health outcomes associated with these substances and their unpredictable effects, especially for men who are disproportionately affected, and particularly for people with underlying cardiovascular and respiratory conditions.”

‘Misleading and Sensational’ Study

Marijuana advocates say it was unfair of the researchers to include synthetic cannabis in their study, which was funded by the National Institutes on Drug Abuse and the American Association of Colleges of Nursing. 

“To lump in adverse effects from synthetically produced compounds in this analysis is misleading and sensational, as these products are not cannabis and their safety profile is not at all comparable to that of natural cannabis,” said Paul Armentano, Deputy Director of NORML.

“Cannabis is psychoactive and that is why advocacy groups opine in favor of its regulation, including the imposition of age controls and product testing for purity and potency. Adverse effects from cannabis, like dysphoria (anxiety), are possible but are best mitigated by regulation and education — not by criminal prohibition.”

Previous studies have looked at the relationship between cannabis and motor vehicle accidents, with mixed results. A survey of people in Michigan who used medical marijuana for chronic pain found that over half had driven while under the influence of cannabis, and one in five say they've driven while “very high.”

Other studies found a decrease in traffic fatalities in states that legalized medical marijuana. That may be because patients were substituting cannabis for alcohol and other drugs used to relieve their symptoms.

Medical Cannabis Reduced Opioid Use in High Dose Patients

By Pat Anson, PNN Editor

In recent years, there have been several studies and surveys – most of them anecdotal -- suggesting that cannabis reduces the need for opioid pain medication. A large new study takes that research a step further, finding direct evidence that chronic pain patients, including those on high doses, significantly reduced their opioid use once they started using medical cannabis.

Researchers with the New York State Department of Health and University of Albany School of Public Health followed over 8,100 patients on long-term opioid therapy (LOT) after they began using medical cannabis. All of the patients had been on opioids for at least 120 days, including some on relatively high daily doses of 90 or more morphine milligram equivalents (MME).

Researchers found that average daily doses declined significantly over time, especially for patients on high opioid doses. After eight months of using medical cannabis (MC), patients taking over 90 MME saw their daily doses fall by nearly 70 percent, compared to a 29% reduction in those getting 50 to 90 MME and a 15% reduction in those on 50 MME or less.

“This cohort study found that receiving MC for longer was associated with opioid dosage reductions. The reductions were larger among individuals who were prescribed higher dosages of opioids at baseline. These findings contribute robust evidence for clinicians regarding the potential benefits of MC in reducing the opioid burden for patients receiving LOT and possibly reduce their risk for overdose,” researchers reported in JAMA Network Open.

The study has some weaknesses. Researchers did not track the pain levels of patients or the types of pain conditions they suffered from. Also unknown is the dose or types of cannabis products they consumed.   

Although the study was conducted at a time when patients nationwide were losing access to opioids or having their doses reduced, researchers say it is “highly unlikely” that impacted their findings because the dosage decline for their patients didn’t begin until they started consuming cannabis.  

Marijuana advocates cheered the study findings.  

“The relationship between cannabis and opioid use is among of the best-documented aspects of marijuana policy,” Paul Armentano, Deputy Director of NORML, said in a statement. “In short, the science demonstrates that marijuana is a relatively safe and effective pain reliever — and that patients with legal access to it consistently reduce their use of prescription opioid medications.” 

A similar study of over 500 chronic pain patients being treated at medical cannabis clinics found a significant decline in their pain levels. And 85% of patients reported they either reduced or stopped using opioids.

A Third of Chronic Pain Sufferers Used Cannabis for Pain Relief

By Pat Anson, PNN Editor

Nearly a third of U.S. adults (31%) with chronic pain have used cannabis as an analgesic, according to a new survey that found over half of those who used cannabis said it enabled them to decrease their use of opioid medication and other pain therapies.

The survey findings, published JAMA Network Open, involved 1,724 people with chronic non-cancer pain who live in the 36 states (and Washington DC) that have legalized medical marijuana.

Unlike other studies that only focused on cannabis reducing opioid use, this survey found that over half of pain sufferers using cannabis also reduced or stop using non-opioid prescription pain relievers and over-the-counter analgesics. Many respondents also reported decreasing their use of physical therapy (39%), cognitive behavioral therapy (26%) and meditation (19%).  

“Most persons who used cannabis as a treatment for chronic pain reported substituting cannabis in place of other pain medications including prescription opioids,” wrote lead author Mark Bicket, MD, an Assistant Professor in the Department of Anesthesiology, University of Michigan School of Medicine.

“The high degree of substitution of cannabis with both opioid and nonopioid treatment emphasizes the importance of research to clarify the effectiveness and potential adverse consequences of cannabis for chronic pain. Our results suggest that state cannabis laws have enabled access to cannabis as an analgesic treatment despite knowledge gaps in use as a medical treatment for pain.”

The survey did not ask whether respondents smoked, vaped or ingested cannabis products, so there’s no way to tell which method was more effective at reducing pain. Nevertheless, it adds to a growing body of evidence that cannabis reduces pain and helps pain sufferers decrease their use of medications and other therapies.  

“Cannabis has established efficacy in the treatment of multiple conditions, including chronic pain, and it possesses a safety profile that is either comparable or superior to other controlled substances,” said Paul Armentano, Deputy Director of NORML, a marijuana advocacy group.

“So it is no wonder that those with legal access to it are substituting cannabis in lieu of other, potentially less effective and more harmful substances. As legal access continues to expand, one would expect the cannabis substitution effect to grow even more pronounced in the future.”

Several previous studies have also found that cannabis users often reduce their use of prescription opioids. A large survey conducted last year found that most medical marijuana users either stopped (42%) or reduced (37%) their use of opioids. A small number were also able to stop using psychiatric medications for anxiety, depression and PTSD.  

Another recent study at Cornell University found that legalization of recreational marijuana in 11 states led to significantly reduced prescribing for Medicaid patients for a broad range of medications used to treat pain, depression, anxiety, seizures and other health conditions.

A 2021 Harris Poll found that twice as many Americans are using cannabis or CBD to manage their pain than opioids.