Article Date | Link | Tags | Body |
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02/05/2024 | Adolescent brains exposed to THC are at higher risk of psychiatric disorders | THC, Brain, Delta-8, Research |
THC exposure during adolescence may cause microglial cell death and brain changes, increasing schizophrenia risks in genetically susceptible individuals. |
12/02/2023 | Subchronic toxicity of cannabis leaves on male albino rats | study, Research, rats |
Abstract Cannabis is the most commonly abused drug in the world. In Egypt, the Anti Narcotic General Administration showed that the narcotics problem costs the Egyptian economy approximately 800 million dollars annually. LD50, lethal dose that kills 50% of the treated animals, of the bango was determined and then selected groups of rats were given tenth of LD50 for 90 days. |
11/16/2023 | Boston Medical Center Psychiatrists Innovate to Treat Teenagers With Marijuana-Induced Psychosis | cannabis-induced psychosis, Delta-8, Research |
When teenagers smoked marijuana back in 1995, the amount of THC, or active ingredient in the drug, was about 4%. But times have changed. With new methods of testing, growing, and regulating marijuana, teens now have access to cannabis with increasingly higher levels of THC. One study found that in 2017 the average potency of marijuana had increased to 17%. This increased potency, plus easier access to many forms of marijuana in recent years, has some dedicated healthcare professionals working to address the possible mental health effects marijuana use may be having on young users, including the risk for psychosis. |
05/27/2023 | CANNABIS: DRUG OF ABUSE AND THERAPEUTIC AGENT, TWO SIDES OF THE SAME COIN | Potency, study, Research, THC levels |
The evidence presented in this review allows us to conclude that Δ9-THC and CBD produce biphasic, dose-dependent effects on several physiological responses. The biphasic nature of cannabinoid effects highlights the need for a careful analysis of the dose ranges separating therapeutic from unwanted effects. Besides, Δ9-THC produces dependence and harmful effects, while CBD does not. |
12/01/2022 | Cannabis For Pain Relief? Review of 20 Studies Provides Sobering Results | study, Placebo, sciencealert |
There are numerous examples of the relationship between treatment expectations and placebo responses. If a person thinks they will experience relief from their pain by using a certain product or treatment, this can change the way they end up perceiving incoming pain signals – making them think their pain is less severe. Recent evidence suggests that the placebo effect may work even if we're presented with evidence that contradicts our initial expectations. |
12/01/2022 | Association of Mental Health Burden With Prenatal Cannabis Exposure From Childhood to Early Adolescence: Longitudinal Findings F | prenatal, Pregnancy, mental health, study, Research, 2023 Presentation Dr Berry |
Conclusions and relevance: This study suggests that prenatal cannabis exposure and its correlated factors are associated with greater risk for psychopathology during middle childhood. Cannabis use during pregnancy should be discouraged. |
11/20/2022 | Sperm DNA methylation alterations from cannabis extract exposure are evident in offspring | study, Research, rats, offspring, heredity, 2023 Presentation Dr Berry |
Conclusions: This is the first characterization of the effect of cannabis exposure on the entirety of the rat sperm methylome. We identified CE-associated methylation changes across the sperm methylome, some of which persisted despite a "washout" period. Select methylation changes validated via bisulfite pyrosequencing, and genes associated with methylation changes were involved in early developmental processes. Preconception CE exposure is associated with detectable changes in offspring DNA methylation that are functionally related to changes in gene expression and cardiomegaly. These results support that paternal preconception exposure to cannabis can influence offspring outcomes. |
11/16/2022 | Placebo Response and Media Attention in Randomized Clinical Trials Assessing Cannabis-Based Therapies for Pain | Placebo, meta-analysis, JAMA, 2023 Presentation Dr Berry, study, Research |
Findings This meta-analysis of 20 studies of 1459 individuals found a significant pain reduction in response to placebo in cannabinoid randomized clinical trials. Media attention was proportionally high, with a strong positive bias, yet not associated with the clinical outcomes. |
03/01/2022 | Cannabis legalization and cannabis-involved pregnancy hospitalizations in Colorado | Pregnancy, science direct, Research |
Research has found that prenatal cannabis use may adversely affect fetal growth and neurodevelopment, be associated with future learning and behavioral problems in children, and increase risk of neonatal morbidity. (Cornelius et al., 2002; Day et al., 1994; El Marroun et al., 2011; Fried and Smith, 2001; Fried et al., 1999; Fried et al., 2003; Fried et al., 1997; Goldschmidt et al., 2000; Goldschmidt et al., 2008; Goldschmidt et al., 2012; Metz et al., 2017; Noland et al., 2005; Willford et al., 2010; Ryan et al., 2018; El Marroun et al., 2018) Several US organizations, including the American College of Obstetricians and Gynecologists and the American Academy of Pediatrics, recommend abstinence from cannabis use during pregnancy. (Ryan et al., 2018; Gynecologists, T.A.C.O.O.A, 2020) Despite these recommendations, there are concerns that the trend of cannabis use during pregnancy will continue to increase as more states and countries legalize cannabis and allow for commercial sales through dispensaries. (Mark and Terplan, 2017) |
01/01/2022 | Cannabis and Psychosis: Recent Epidemiological Findings Continuing the “Causality Debate” | cannabis-induced psychosis, Research, Psychosis |
In summary, much of the available evidence supports the criteria of strength, consistency, biological gradient, and temporality for cannabis causing psychosis. Furthermore, supporting specificity, while many substances are known to induce psychosis, the risk for conversion to schizophrenia is greatest with cannabis-induced psychosis. |
06/01/2021 | Cannabis use may be associated with suicidality in young adults | youth, suicide, NIH, study, Research |
An analysis of survey data from more than 280,000 young adults ages 18-35 showed that cannabis (marijuana) use was associated with increased risks of thoughts of suicide (suicidal ideation), suicide plan, and suicide attempt. These associations remained regardless of whether someone was also experiencing depression, and the risks were greater for women than for men. |
06/01/2020 | Association Between the Use of Cannabis and Physical Violence in Youths: A Meta-Analytical Investigation | meta-analysis, Research |
After screening 11,348 potential studies....These results demonstrate a moderate association between cannabis use and physical violence, which remained significant regardless of study design and adjustment for confounding factors (i.e., socioeconomic factors, other substance use). Cannabis use in this population is a risk factor for violence. |
05/08/2020 | Cannabis Increases Propensity for False Memories | Research, memory, false memories |
To look for longer-term effects of cannabis, the experimenters called the subjects back a week later and tested them again on the word lists, this time with a few different dummy words thrown in. They also re-interviewed the subjects about the VR scenarios using a combination of old and new questions. As before, they found lower memory accuracy in the word-association test in those who had been intoxicated compared with sober participants. There were no statistically significant differences between the groups for the virtual reality scenarios, a result that Kloft says may indicate memory decay over time in all participants. |
09/08/2019 | Reducing the risks of distortion in cannabis research | Research, Medical, risks, opioid |
But the lives of vulnerable people may be put at risk when science is distorted for corporate or ideological ends. As noted, several USstates responded to the much-hypedoriginal study of cannabis and opioid overdosesby authorizing the use of medical cannabis to treat heroin-addicted individuals. Advice that opioid users should use medical cannabis toreplace opioid agonist therapies (e.g., methadone, buprenorphine) poses significant risk because abrupt cessation of these medications dramatically increases the risks of an overdose death if users return to opioid use |
08/12/2019 | Association Between Electronic Cigarette Use and Marijuana Use Among Adolescents and Young Adults | meta-analysis |
Conclusions and Relevance This meta-analysis found a significant increase in the odds of past or current and subsequent marijuana use in adolescents and young adults who used e-cigarettes. These findings highlight the importance of addressing the rapid increases in e-cigarette use among youths as a means to help limit marijuana use in this population. |
03/19/2019 | cannabis use to variation in the incidence of psychotic disorder across Europe | Research, study, Lancet, Potency, Psychosis, cannabis-induced psychosis |
In conclusion, our findings confirm previous evidence of the harmful effect on mental health of daily use of cannabis, especially of high-potency types. Importantly, they indicate for the first time how cannabis use affects the incidence of psychotic disorder. Therefore, it is of public health importance to acknowledge alongside the potential medicinal properties of some cannabis constituents the potential adverse effects that are associated with daily cannabis use, especially of high-potency varieties. |
07/01/2018 | Cannabis use and driving-related performance in young recreational users: a within-subject randomized clinical trial | Canada, Research, study, driving, youth |
We found that among young recreational cannabis users, a regular dose of cannabis had no effect on simple and learned tasks, but its use led to significant impairments on complex and novel driving-related tasks, as well as perceived driving ability and safety, for up to 5 hours after use. The present finding that the first 5 hours after cannabis use affected driving-related performance substantiates the recommendations of Canada’s Lower-Risk Cannabis Use Guidelines, which recommend waiting 6 hours after cannabis use before driving.30 |
04/17/2018 | Medical Marijuana Users are More Likely to Use Prescription Drugs Medically and Nonmedically | opioid, study, Research |
Conclusions: Our findings disconfirm the hypothesis that a population-level negative correlation between medical marijuana use and prescription drug harms occurs because medical marijuana users are less likely to use prescription drugs, either medically or nonmedically. Medical marijuana users should be a target population in efforts to combat nonmedical prescription drug use. |
04/14/2018 | Mood Fluctuation and Psychobiological Instability: The Same Core Functions Are Disrupted by Novel Psychoactive Substances and Es | Research, Psychoactive |
Many novel psychoactive substances (NPS) have entered the recreational drug scene in recent years, yet the problems they cause are similar to those found with established drugs. This article will debate the psychobiological effects of these newer and more traditional substances. It will show how they disrupt the same core psychobiological functions, so damaging well-being in similar ways. |
04/08/2018 | Review of the public health risks of widespread cannabis use | Pregnancy, car crashes, mental health, pediatrics, Long-term, Doctors, Research, second hand smoke, smoking |
1. Legalizing cannabis has been shown to increase the rates of motor vehicle accidents. |
01/08/2018 | "Positive" urine testing for Cannabis is associated with increased risk of traffic crashes | Research, car crashes, drug testing |
bstract Although recent Cannabis use is widely reported to be associated with drug-related traffic accidents, the evidence that Cannabis users show an increased risk of being involved in road crashes is still not unequivocally proved. The purpose of the present work is to provide an objective assessment of this hypothesis, by comparing the frequency of occurrence of positive urine analyses in drivers involved in traffic accidents (n = 1406) with that observed in a control population undergoing mandatory urine drug testing (n = 1953). Urine analyses for drugs of abuse were performed by screening immunometric techniques followed by confirmation with UHPLC-QQQ MS, adopting a cut-off concentration for THC-COOH of 15 ng/mL. A case was classified as "positive" when a driver admitted to hospital for road traffic injuries showed urine concentrations of THC-COOH higher than the cut-off. All samples showing positive results for any other controlled drug in urine or blood alcohol concentrations >0.5 mg/mL were excluded from the study. Subjects positive to THC-COOH, and negative to all the other tested substances were 116 in Group 1 (8.2%) and 16 in Group 2 (0.8%). Subjects resulting negative to any tested substances were 1290 in Group 1 and 1937 in Group 2. The frequency of THC-COOH detection in the two groups was compared by using the "chi square" test, which resulted = 119.57, i.e. highly significant (P <<< 0.01). The Odds Ratio of the two groups was =10.88, showing a high degree of association between the presence of THC-COOH in urine and the occurrence of traffic accidents (P < 0.0001). The presented data, proving a high degree of association between Cannabis use and the occurrence of traffic accidents with injuries of the driver, support the use of urine testing for Cannabis in the procedures for the issuing of the driving licence, particularly in the case of subjects formerly or presently using Cannabis. This finding looks even more relevant in the present times, because of the increasing success of the policies of legalization of Cannabis for medical and non-medical purposes.
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04/20/2017 | ‘Medical’ marijuana is incompatible with mental health promotion | Research, mental health |
Similarly, it can be anticipated that if introduced, the indications for the use of medical cannabinoids would expand well outside of the initial indications. Hence, the medical profession cannot justify the use of medical cannabinoids that would be associated with an iatrogenic risk of serious adverse psychological events. The use of medical cannabinoids for any purpose, including research under closely observed conditions, is incompatible with mental health promotion. |
03/18/2017 | Marijuana use and physical dating violence among adolescents and emerging adults: A systematic review and meta-analysis. | meta-analysis, PDV, adolescent, Studies, Research, ncbi |
Findings suggest that marijuana use is associated with a 54% increase in the odds PDV (physical dating violence) victimization, and a 45% increase in the odds of perpetration. CONCLUSIONS: Findings suggest that dating violence is a correlate of marijuana use, and that association is strongest among adolescents (vs. emerging adults) and girls (vs. boys). |
03/18/2017 | Long lasting effects of chronic heavy cannabis abuse. | ncbi, chronic, impaired, delusions, Long-term, Studies, Research |
The existence of hallucinations, delusions, and organic brain dysfunction in heavy cannabis users seems to be associated with cannabinoid levels in hair. The continuation of persistent symptoms 3 months after the discontinuation of cannabis abuse, was a remarkable finding. SCIENTIFIC SIGNIFICANCE: We provide evidence that chronic and heavy cannabis abuse results in long-lasting brain dysfunction in all users and in long-lasting schizophrenia-like psychotic symptoms in more than half of all users. These findings suggest a reevaluation of the current classification of cannabis as a "soft narcotic" which erroneously, therefore, is typically considered harmless. (Am J Addict 2017;XX:1-8). |
02/14/2017 | Marijuana Is Not Safe to Smoke, Researchers Say | smoking, Research, second hand smoke |
The mold and bacteria was so widespread and potentially dangerous that the UC Davis academics concluded that they cannot recommend smoking raw or dried weed. "We cannot recommend inhaling it," says George Thompson III, an associate professor of clinical medicine at the university who helped conduct the cannabis research. |
02/13/2017 | Is the Hype of Medical Marijuana All Smoke and Mirrors? | MM Regulations, Studies |
Short-term side effects include impaired short-term memory, impaired motor function, altered judgment, and, in high doses, paranoia and psychosis. Not to mention that drivers who have recently smoked marijuana are twice as likely to get into a car accident than their sober counterparts.Approximately 9% of people who experiment with marijuana will become addicted. |
02/08/2017 | GW Pharma Reports Success with THC and CBD Combo in Brain Cancer Phase 2 Clinical Trial | gw pharm, Studies, cancer | |
01/17/2017 | Marijuana Violence and Law | Research, Journal of Addiction, crime, violence, mental health, withdrawal symptoms |
According to research studies, marijuana use causes aggressive behavior, causes or exacerbates psychosis and produce paranoias. These effects have been illustrated through case studies of highly publicized incidents and heightened political profiles. Marijuana is currently a growing risk to the public in the United States. Following expanding public opinion that marijuana provides little risk to health, state and federal legislatures have begun changing laws that will significantly increase accessibility of marijuana. Greater marijuana accessibility, resulting in more use, will lead to increased health risks in all demographic categories across the country. Violence is a well-publicized, prominent risk from the more potent, current marijuana available. |
01/06/2017 | Heavy Marijuana Use May Alter Dopamine System Much Like Heroin and Cocaine | Studies, dopamine, Skywood |
“But the bottom line is that long-term, heavy cannabis use may impair the dopaminergic system, which could have a variety of negative effects on learning and behavior,” said Dr. Anissa Abi-Dargham, professor of psychiatry and a lead author of the paper. |
01/06/2017 | The Clinical Conundrum of Medical Marijuana | Potency, Studies, driving, Finn, MD, 2017 Legislation |
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11/14/2016 | Marijuana use may be linked to temporarily weakened heart muscle | heart, Studies, Research, American Heart Association |
"This development of stress cardiomyopathy in younger patients who used marijuana suggests a possible link that needs to be further investigated," said Sahil Agrawal, M.D., co-author of the paper and also a chief cardiology fellow at St. Luke's. Marijuana users were more likely than non-users to have a history of depression (32.9 percent vs. 14.5 percent), psychosis (11.9 percent vs. 3.8 percent), anxiety disorder (28.4 percent vs. 16.2 percent), alcoholism (13.3 percent vs. 2.8 percent), tobacco use (73.3 percent vs. 28.6 percent) and multiple substance abuse (11.4 percent vs. 0.3 percent). Because some of these can increase the risk of stress cardiomyopathy, the researchers adjusted for known risk factors to investigate the association between marijuana use and stress cardiomyopathy. |
11/01/2016 | Educational Outcomes | education, PubMed, Studies |
CONCLUSIONS: |
10/19/2016 | Δ9-THC Intoxication by Cannabidiol-Enriched Cannabis Extract in Two Children with Refractory Epilepsy: Full Remission after Swit | Charlotte's Web, Studies, CBD |
The children presented typical signs of intoxication by Δ9-THC (inappropriate laughter, ataxia, reduced attention, and eye redness) after using a CBD-enriched extract. The extract was replaced by the same dose of purified CBD with no Δ9-THC in both cases, which led to improvement in intoxication signs and seizure remission. |
09/01/2016 | Complexities in understanding and addressing the serious public health issues related to the nonmedical use of prescription drug | Studies, Research, Prescription, epidemic, 2017 Legislation |
A common theme among every article in this issue is the overlap be- tween NMUPD, excessive drinking, and marijuana and other forms of substance use. In every investigation, nonmedical users were observed to have a history of using alcohol, marijuana, tobacco, and other psycho- active substances. Kalyanam, Katsuki, Lanckriet, and Mackey (2017) |
08/31/2016 | What Scientific & Medical Journals & Experts Say About Marijuana | Arizona, Research |
30 Referenced Resources |
08/20/2016 | PubMed | PubMed, Studies | |
06/26/2016 | Yale Study Shows Danger of Marijuana | Veterans, PTSD, Studies |
“In this observational study,” it found that “initiating marijuana use after treatment was associated with worse PTSD symptoms, more violent behavior, and alcohol use. Marijuana may actually worsen PTSD symptoms or nullify the benefits of specialized, intensive treatment. Cessation or prevention of use may be an important goal of treatment.” |
05/08/2016 | Study shows marijuana users twice as likely to give birth prematurely | Pregnancy, Studies |
For the researchers of the study, the results present a “a major public health concern” as a number of pregnant women would report taking marijuana to alleviate morning sickness or nausea – without knowing of the adverse side-effects. http://www.sciencedirect.com/science/article/pii/S0890623816300715# Highlights
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04/01/2016 | Marijuana Use: Detrimental to Youth | American Academy of Pediatrics, youth, Research, Side-Effects |
In summary, marijuana use is harmful to children and adolescents. For this reason, the American College of Pediatricians opposes its legalization for recreational use and urges extreme caution in legalizing it for medicinal use. Likewise, the American Academy of Child and Adolescent Psychiatry (AACAP) recently offered their own policy statement opposing efforts to legalize marijuana. They similarly pointed out that “marijuana’s deleterious effects on adolescent brain development, cognition, and social functioning may have immediate and long-term implications, including increased risk of motor vehicle accidents, sexual victimization, academic failure, lasting decline in intelligence measures, psychopathology, addiction, and psychosocial and occupational impairment.” Thus the AACAP (a) opposes efforts to legalize marijuana, (b) supports initiatives to increase awareness of marijuana’s harmful effects on adolescents, (c) supports improved access to evidence-based treatment, rather than emphasis on criminal charges, for adolescents with cannabis use disorder, and (d) supports careful monitoring of the effects of marijuana-related policy changes on child and adolescent mental health.49 The College agrees with this position on marijuana. |
03/20/2016 | Marijuana Use Increases Violent Behavior | violence, Studies, crime |
What makes this new study more compelling than previous studies is that the researchers followed the same individuals for over 50 years from a young age to adulthood. This is precisely what one needs to solve the chicken or egg riddle with respect to cannabis and violence: just look and see which one happens first. |