Author: russellrope

Longitudinal Study: Endometriosis Patients Experience Improvements Following Medical Cannabis Therapy

London, United Kingdom: Endometriosis patients report health-related quality of life improvements following the use of medical cannabis preparations, according to observational data published in the journal Obstetrics & Gynecology.

British investigators assessed the use of cannabis-based medicinal products (CBMPs) in a cohort of 63 endometriosis patients enrolled in the UK Medical Cannabis Registry. (British health care providers may prescribe cannabis-based medicinal products to patients unresponsive to conventional medications.) Patients’ outcomes were assessed at baseline and at 1, 3, 6, 12, and 18 months. Study participants consumed either herbal cannabis or oil extracts containing a nearly equal ratio of THC and CBD.

Patients acknowledged improvements in their chronic pain and other health-related quality of life measures following cannabis therapy.

“These results provide a signal towards improvement in short-term pain severity and interference for endometriosis patients after the initiation of CMBP treatment,” the study’s authors concluded. “This study provides valuable real-world data and complements the development of RCTs [randomized clinical trials] to further examine the efficacy and safety of CBMPs for endometriosis-associated chronic pain.”

Survey data reports that nearly one in five endometriosis patients consume cannabis to manage their symptoms.

Other observational studies assessing the use of cannabis products among those enrolled in the UK Medical Cannabis Registry have reported them to be beneficial for patients diagnosed with treatment-resistant epilepsy, cancer-related pain, anxiety, fibromyalgia, inflammatory bowel disease, hypermobility disorders, depression, migraine, multiple sclerosis, osteoarthritis, substance use disorders, insomnia, and inflammatory arthritis, among other conditions.

Full text of the study, “A longitudinal assessment of endometriosis patients prescribed cannabis-based medicinal products: A case series from the UK Medical Cannabis Registry,” appears in Obstetrics & Gynecology.

Case Reports: Cannabis Oil Associated With Tumor Regression in Patients With Advanced Liver Cancer

Groningen, Netherlands: A pair of patients with advanced hepatocellular carcinoma (HCC) experienced spontaneous tumor regression following the daily use of cannabis extracts, according to data published in the Journal of Cannabis Research.

Dutch investigators documented “complete” tumor regression in a pair of patients with advanced HCC. Both patients consumed THC-dominant cannabis oils daily. Neither patient engaged in any significant lifestyle, dietary, or other supportive interventions aside from the use of cannabis extracts.

Spontaneous regression of HCC typically occurs in fewer than one-half of one percent of all cases.

The study’s authors concluded: “In this report, we present two patients (ages 82 and 77) with advanced HCC with a high tumor burden who demonstrated durable and complete regression after use of cannabis oil. … The observations in this report build on previous (pre)clinical research highlighting the potential anti-tumor qualities of cannabinoids and stress the need for clinical trials investigating the anti-tumor effects of cannabinoids in cancer patients.”

Cannabinoids have demonstrated well-established anti-cancer activities in preclinical models, but their efficacy as an anti-cancer agent has rarely been assessed in clinical trials.

Full text of the study, “Durable complete response of advanced hepatocellular carcinoma using cannabis oil: A report of two cases,” appears in the Journal of Cannabis Research.

Study: Cannabis Use History Not Linked To Elevated Risk of Prostate Cancer

Miami, FL: Men over 50 with a history of cannabis use are no more likely to experience prostate cancer than are non-users, according to data published in the journal Nature: Scientific Reports.

Investigators affiliated with the University of Miami’s Miller School of Medicine assessed the relationship between the lifetime use of cannabis and psychedelic drugs with prostate cancer diagnoses among a representative sample of older adults.

Researchers identified a slight correlation between psychedelic drug use and prostate cancer, but they reported no similar elevated risk among those who consumed cannabis. “No significant associations were found for cannabis-only use versus non-use,” they acknowledged.

“With the growing acceptance and accessibility of cannabis and psychedelics for both medical and recreational purposes, understanding their potential long-term health implications is essential, particularly for older adults who are at higher risk of prostate cancer diagnosis,” the study’s authors concluded. “[O]ur cross-sectional findings … may inform clinicians to consider discussing substance use histories, including cannabis and psychedelic use, during routine health assessments and cancer risk evaluations in aging male patients.”

Full text of the study, “Association between lifetime co-use of classic psychedelics and cannabis and prostate cancer diagnosis among US adults 50 years and older,” appears in Nature: Scientific Reports.

Analysis: Cannabis Use Not Associated With Heart Abnormalities in HIV Patients

Miami, FL: HIV patients with a history of cannabis use are not at an increased risk for myocardial infarction or other adverse cardiovascular events, according to ECG (electrocardiogram) findings published in the Journal of Acquired Immune Deficiency Syndrome.

Investigators affiliated with the University of Miami’s Miller School of Medicine and the University of California at San Francisco assessed ECG results in 3,610 HIV patients with and without a history of cannabis use.

Researchers reported that cannabis use was not independently associated with ECG abnormalities, including evidence of myocardial infarction (heart attack). They concluded, “We sought to evaluate the association of cannabis use and ECG abnormalities. … Evidence of ECG abnormalities did not vary significantly by cannabis use status alone in the overall cohort, nor by sex, when controlling for covariates.”

Although individual studies assessing cannabis use and cardiovascular health have yielded inconsistent results, a literature review of 67 papers published in The American Journal of Medicine concluded, “[M]arijuana itself does not appear to be independently associated with excessive cardiovascular risk factors.” More recently, an analysis of over 720,000 adults published in the American Journal of Preventive Medicine (AJPM) Focus concluded that current cannabis consumers do not possess a greater risk of heart attack as compared to non-users.

Full text of the study, “The association between cannabis use and electrocardiographic abnormalities in people living with HIV,” appears in the Journal of Acquired Immune Deficiency Syndrome.

Study: Cannabis Inhalation Associated With Symptomatic Improvements in Adults With Autism Spectrum Disorder

Pullman, WA: Adults with ASD (autism spectrum disorder) report significant improvements in their symptoms following cannabis inhalation, according to data published in the journal Nature: Scientific Reports.

Researchers affiliated with Washington State University and the University of New Orleans reviewed data from 111 self-identified ASD patients (ages 19 to 70). Study participants self-medicated with cannabis and reported their results in real-time on the mobile technology platform Strainprint. Investigators assessed nearly 6,000 separate Strainprint entries compiled over 74 months.

They reported: “Using a large dataset from self-identified autistic adults self-medicating with cannabis, we found that ratings of the severity of Negative Affect (anxiety and irritability) were reduced by 75.78 percent, ratings of the severity of Repetitive Behaviors (compulsive behaviors) were reduced by 70.41 percent, ratings of the severity of problems with Mental Control (difficulty concentrating) were reduced by 68.59 percent, and ratings of Sensitivity (skin and sound sensitivity, sensory overload) severity were reduced by 68.09 percent, from immediately before to shortly after inhaling cannabis. Moreover, these symptoms were reduced (rather than exacerbated or unchanged) in 98.33 percent of the cannabis use sessions. These findings are among the first to indicate that cannabis is perceived to improve highly prevalent symptoms associated with ASD in adults using cannabis for symptom management.”

Study participants acknowledged experiencing symptomatic improvements from cannabis regardless of its potency or its cannabinoid ratios.

“These findings indicate that well-powered placebo-controlled trials are warranted to examine the acute effects of various cannabinoids and manipulations of the endocannabinoid system on ASD symptoms,” the study’s authors concluded.

The findings are consistent with observational studies involving patients enrolled in the United Kingdom’s Medical Cannabis Registry, which similarly report that adults with ASD experience improved symptoms and reduce their use of prescription medications following their use of medical cannabis products.

Full text of the study, “Acute effects on cannabis on core and co-occurring features associated with autism spectrum disorder in adults,” appears in Nature: Scientific Reports.

Analysis: Cannabis Use Associated With Lower Rates of Obesity, Metabolic Syndrome

Adelaide, Australia: Adults with a history of recent cannabis use are less likely to suffer from metabolic syndrome (aka MetS, a cluster of biochemical and physiological markers associated with the development of cardiovascular disease and type 2 diabetes) as compared to similarly matched controls, according to data published in the journal Schizophrenia Research.

Australian researchers assessed MetS prevalence in a cohort of schizophrenic patients with and without a history of cannabis consumption.

They reported that THC-positive subjects “exhibited a significantly lower prevalence of MetS (adjusted OR = 0.61),” even after researchers adjusted for potential confounders. Cannabis use was also associated with lower weight, BMI, and cholesterol levels – findings that are consistent with prior studies.

“Our findings demonstrate a significant association between cannabis use and a lower prevalence of metabolic syndrome in individuals with schizophrenia,” the study’s authors concluded. However, they cautioned: “Given the well-established adverse psychosis-related outcomes of cannabis use in this population, our findings underscore the need for cautious interpretation. The relationship between cannabis use and cardiometabolic health in schizophrenia is likely multifactorial, influenced by biological, pharmacological and behavioral traits that remain poorly understood. … Future research should investigate the long-term cardiometabolic effects of both cannabis use and cessation and assess the potential for targeted metabolic interventions during this critical period.”

Full text of the study, “Cannabis use and cardiometabolic risk in schizophrenia,” appears in Schizophrenia Research.

Clinical Trial: CBD Dosing Reduces Dementia Symptoms in Older Adults

São Paulo, Brazil: The daily use of CBD reduces dementia symptoms, according to placebo-controlled clinical trial data published in the Journal of Psychopharmacology.

Brazilian researchers assessed the efficacy of CBD versus a placebo in 30 older patients with vascular dementia (VaD). Study participants consumed either 300mg doses of CBD or the placebo for four weeks.

CBD administration significantly reduced patients’ behavioral and psychiatric symptoms compared to placebo. CBD dosing did not adversely impact patients’ cognitive functioning, nor was it associated with any other significant side effects.

“CBD was well tolerated and effectively reduced BPSD [behavioral and psychological symptoms of dementia] in VaD without cognitive or functional impairment,” the study’s authors concluded. “These findings warrant further trials with larger samples, extended durations, and dose-optimization strategies to confirm its therapeutic potential.”

According to the conclusions of a review paper published previously this year in the same journal, “Cannabinoids show promising potential in managing symptoms such as agitation and aggression in people with dementia, with an overall favorable safety and tolerability profile.”

Full text of the study, “Effects of cannabidiol on behavioral and psychological symptoms of vascular dementia: A randomized, double-blind, placebo-controlled clinical trial,” appears in the Journal of Psychopharmacology.

California: No Significant Uptick in Marijuana Use by Adults Following Legalization

Berkeley, CA: The percentage of adults in California reporting current cannabis use has remained stable following legalization, according to findings published in the journal Substance Use & Misuse.

Researchers affiliated with the Prevention Research Center in Berkeley assessed trends in past 30-day cannabis use from 2018 to 2023 using data compiled by the California Health Interview Survey – a representative sample of tens of thousands of Californians.

Contrary to investigators’ expectations, they identified no significant overall increase in self-reported cannabis use by adults.

“In summary, the overall trend for cannabis use in the past 30-day in California remained unchanged from 2018 to 2023, eight years after legalization and six years after cannabis retail became available,” the study’s authors concluded. “Future research should focus on identifying trends among gender, age, and ethnic groups.”

The findings are consistent with national trends reporting no significant uptick in marijuana use by adolescents post-legalization, but they are inconsistent with several surveys finding increased cannabis use among young adults and seniors.

Full text of the study, “Trends in pot-legalization cannabis use among ethnic groups in California: 2018-2023,” appears in Substance Use & Misuse.