Research and Studies

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THC, Brain, Delta-8, Research

THC exposure during adolescence may cause microglial cell death and brain changes, increasing schizophrenia risks in genetically susceptible individuals.
 
Earlier, a 2023 study found heavy marijuana use may trigger schizophrenia, particularly in young men. This study examined the health records of nearly 7 million Danish citizens and determined that up to 30% of schizophrenia diagnoses — around 3,000 in total — could have been prevented if young men hadn’t abused marijuana.

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.
All over the world, there is growing interest in the part played by drugs in traffic accidents, and how to investigate adequate measures to reduce their incidence.2 Africa is the second largest producer of herbal cannabis in the world.3 In Egypt, drug addiction is considered one of the serious problems that worry both people and government. It affects young people within their productive years. It may lead to many problems such as social maladaptation, decreased works productivity and job loss.4 ‘Bango’ is the name of cannabis leaves used in Egypt and North Africa.5
Conclusion In conclusion, the present study revealed the bad effects of the bango plant on different organs in animals. Bango abuse leads to severe effects on different organs and this may subsequently lead to apoptosis and fibrosis of the organs, and this depends mainly on the dose and duration of administration.

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.

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.
The available pharmaceutical formulations of these phytocannabinoids and related molecules have clear therapeutic effects; however, more research is needed to assure their efficacy and safety since their effects are complex. Several additional potential therapeutic applications, mainly for CBD, are being proposed which, however, still lack sufficient clinical and preclinical support. For this reason, caution is advised when using or prescribing cannabinoids.
Additional consideration deserves the fact that the ECS participates in the development of the central nervous system98. Therefore, the use of cannabinoid-based formulations for the medical treatment of children and adolescents experiencing brain developmental changes must be carefully examined, balancing the pros and cons of prescribing cannabinoid-based medications in every single case. Cannabis research field is expanding with the identification of new molecular targets, the characterization of undescribed phytocannabinoids, and novel findings related to the ECS99. In addition, consumption of synthetic cannabinoids as drugs of abuse represents a new challenge in addiction research100.

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.
We cannot say with 100 percent certainty that media coverage is responsible for the high placebo response observed in our review. But given placebos were shown to be just as good as cannabis for managing pain, our results show just how important it is to think about the placebo effect and how it can be influenced by external factors – such as media coverage.

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.     

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.     

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.
Meaning  These findings suggest that placebo has a significant association with pain reduction as seen in cannabinoid clinical trials, and the positive media attention may shape placebo responses in future trials.

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)

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.

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.
“Suicide is a leading cause of death among young adults in the United States, and the findings of this study offer important information that may help us reduce this risk,”

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.

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.

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 

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.

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.

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
 

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.

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.

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.
2. Cannabis use is a risk factor for mental illness.
3. Inhaled Cannabis use is a risk factor for respiratory infections.
4. Cannabis use increases the rate of vascular disease. Cannabis is the third most often identified drug of abuse
5. Cannabis use during pregnancy has been associated with increased risk of adverse birth outcomes
6. Legalization of cannabis has been shown to increase cannabis exposure in the pediatric population.
7. Heavy cannabis use is associated with diminished lifetime achievements.
Doctors must educate the public about the potential harm cannabis causes with heavy, and possibly moderate, widespread use just as they do about the dangers of tobacco use. Tobacco use has declined in the United States in large part because of the knowledge the public now holds about its adverse effects, as opposed to legislative action.

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.

 

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.

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).

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).

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.

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.
If marijuana can meet all of the FDA requirements, including efficacy data, evidence of safety, and a meticulous quality control program, then the medicinal use of marijuana could be supported. Until then, we will need smoke and mirrors to make it appear that this drug not only makes people feel good, but is indeed good for you.

gw pharm, Studies, cancer
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.

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.
 
“I used to be able to read a book and even after a couple years I would still know most of the book,” she said. “Now I have to read something four or five times to remember.”

Potency, Studies, driving, Finn, MD, 2017 Legislation

Detailed Information
. Patients freely share their “medicine” with family and friends, and parents are self-diagnosing, and subsequently dosing their children with high-concentration marijuana products for conditions that may simply not exist (attention-deficit/hyperactivity disorder, anxiety, etc.); or allow their medical cards to expire and continue to grow their own.
The use of marijuana for medical conditions, including pain, needs robust studies, and subsequent products need more regulation and consistency for public consumption. Colorado is an example of the societal effect across a wide spectrum of arenas that comes with rampant cannabis use, particularly in youth use and impaired driving fatalities. The problems Colorado is seeing completely transcend “responsible use” or “marijuana as medicine.” 

 

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.

education, PubMed, Studies

CONCLUSIONS:
Medical marijuana law exposure between age 14 to 18 likely has a delayed effect on use and education that persists over time.

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. 

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)
Kalyanam, J., Katsuki, T., Lanckriet, G., & Mackey, T. K. (2017). Exploring trends of non- medical use of prescription drugs and polydrug abuse in the Twittersphere using un- supervised machine learning. Addictive Behaviors, 65, 289–295. http://dx.doi.org/10. 1016/j.addbeh.2016.08.019.

Arizona, Research

30 Referenced Resources

PubMed, Studies

http://www.ncbi.nlm.nih.gov/pubmed/?term=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.”

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

Marijuana increases the risk of spontaneous preterm birth independent of cigarette smoking status and socio-economic status.

Women who continue to use marijuana at 20 weeks’ gestation are five times more likely to deliver preterm than those who do not.

The rate of early SPTB is higher amongst women who continue to use marijuana at 20 weeks’ gestation.

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.

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.
One fifth of those who were pot smokers (22%) reported violent behavior that began after beginning to use cannabis, whereas only 0.3% reported violence before using weed.  Continued use of cannabis over the life-time of the study was the strongest predictor of violent convictions, even when the other factors that contribute to violent behavior were considered in the statistical analysis.
 In conclusion, the results show that continued cannabis use is associated with a 7-fold greater odds for subsequent commission of violent crimes.  This level of risk is similar to the increased risk of lung cancer from smoking cigarettes over a similar duration (40 years).  The authors suggest that impairments in neurological circuits controlling behavior may underlie impulsive, violent behavior, as a result of cannabis altering the normal neural functioning in the ventrolateral prefrontal cortex. 

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