Author Interviews, Cannabis, Medical Imaging, OBGYNE, Pediatrics / 10.04.2025

MedicalResearch.com Interview with: Sam (Seyedmehdi) Payabvash, MD Associate Professor of Radiology Columbia University Medical Center MedicalResearch.com: What is the background for this study? Response: Prenatal marijuana use is on the rise, largely due to increasing legalization and shifting public perception of its safety during pregnancy. Although prior studies have linked prenatal marijuana exposure to adverse neonatal and behavioral outcomes, the long-term neurodevelopmental effects, especially as assessed through advanced neuroimaging techniques, remain underexplored. (more…)
Author Interviews, Cannabis, Pediatrics / 26.03.2025

MedicalResearch.com Interview with: Mr. Abay Tadesse,  PhD candidate School of Population Health Curtin University Australia MedicalResearch.com: What is the background for this study? Response: Few studies have investigated the association between maternal gestational cannabis use and the risk of disruptive behavioural disorders (DBDs) in offspring. Small sample sizes, reliance on self-reported data and focus on solely in-utero exposure often limit existing research, leading to inconsistent findings. Given the increasing prevalence of cannabis use during pregnancy, there is an urgent need for robust, population-based evidence to better understand its potential impact on child neurobehavioral outcomes. This study aimed to examine the relationship between maternal cannabis use disorder (CUD) during pregnancy and postpartum periods and the risk of DBDs in offspring. Using linked health data from New South Wales, Australia, we conducted a population-based retrospective cohort study of live births between 2003 and 2005. (more…)
Author Interviews / 20.03.2025

Editor’ note:  Cannabis and THCA/HEMP CBD products should have an active ingredient list on the container and have a Certificate of Analysis (COA). Discuss your use of CBD products with your health care provider.  Dosing of CBD is variable, especially since it is not FDA regulated. CBD may interfere with other medications and should not be used in individuals with certain health conditions, including liver issues. CBD skin care products can be absorbed through the skin and have similar effects. Do not use Cannabis products including edibles and CBD if you are pregnant, nursing or may become pregnant. Do not use cannabis products if driving or operating difficult or dangerous machinery.  Children should not be exposed to cannabis or CBD products. In recent years, medical marijuana has been widely applied across the USA. However, in some states its use is still a bit restricted, like in North Carolina. As scientists and medical specialists continue to explore the therapeutic power of marijuana, the list of cases when it is allowed to be used expands year after year. If we speak about North Carolina in particular, patients who suffer from specific health states can legally obtain medical cannabis from licensed medical marijuana doctors only. This treatment is very effective in general. (more…)
Author Interviews, Cannabis / 27.02.2025

MedicalResearch.com Interview with: Elena Stains Medical Student Department of Medical Education Geisinger Commonwealth School of Medicine Scranton, PA MedicalResearch.com: What is the background for this study? Response: In 2019 to 2020, 2.5% of Americans reported using cannabis for medical needs, compared to 1.2% in 2013-2014, representing a 12.9% annual increase1. Forty states and the District of Columbia have legislation for some form of medical cannabis (MC) in 2024. Because MC is not federally legalized, each state creates its own legislation on the conditions that qualify a person for MC, without any standardized process to determine what qualifying conditions (QC) are proven to be aided by MC. Thus, the QCs chosen by states vary widely. Common QCs include cancer, dementia, and PTSD. The National Academies of Sciences, Engineering, and Medicine (NAS) published a report in 2017 on the evidence for the therapeutic effects of cannabis and cannabinoids for over twenty conditions2. This report reviews the evidence of effectiveness of medical cannabis for the most common QCs chosen by states. The researchers at Geisinger Commonwealth School of Medicine aimed to compare the evidence found by the NAS report with the QCs of 38 states (including the District of Columbia) in both 2017 and 2024. QCs were categorized based on NAS-established level of evidence: limited, moderate, or substantial/conclusive evidence of effectiveness, limited evidence of ineffectiveness, or no/insufficient evidence to support or refute effectiveness (Table 1). (more…)
Author Interviews, Cannabis, JAMA, Pediatrics, UCSD / 30.01.2025

MedicalResearch.com Interview with: John Bellettiere, PhD Assistant Adjunct Professor Herbert Wertheim School of Public Health & Human Longevity Science University of California, San Diego MedicalResearch.com: What is the background for this study? Response:  Smoking is the most common method of cannabis use and generates harmful emissions.  Cannabis is often smoked indoors, which exposes non-smokers, including children, to these emissions. Our research analyzed in-home cannabis smoking practices to determine if there is an association between this behavior and the detection of cannabis biomarkers in children. (more…)
Author Interviews, Cannabis, Cognitive Issues, JAMA, Memory, Mental Health Research / 28.01.2025

MedicalResearch.com Interview with: Joshua Gowin PhD Assistant Professor, Radiology Anschutz Medical Campus University of Colorado  MedicalResearch.com: What is the background for this study? Response: Many people want to know how cannabis affects their brain and cognitive abilities. Previous studies have shown that cannabis use can impair learning and verbal memory function. Some evidence has shown that cannabis use is associated with smaller volume of areas of the prefrontal cortex. Our study investigated how cannabis use is associated with brain function. We examined brain function across 7 tasks in 1,000 adults. 88 of them had used cannabis over 1,000 times in their lives. (more…)
Cannabis / 26.01.2025

Editor’ note:  Cannabis and THCA/HEMP CBD products should have an active ingredient list on the container and have a Certificate of Analysis (COA). Discuss your use of CBD products with your health care provider.  Dosing of CBD is variable, especially since it is not FDA regulated. CBD may interfere with other medications and should not be used in individuals with certain health conditions, including liver issues. CBD skin care products can be absorbed through the skin and have similar effects. Do not use Cannabis products including edibles and CBD if you are pregnant, nursing or may become pregnant. Do not use cannabis products if driving or operating difficult or dangerous machinery. Children should not be exposed to cannabis or CBD products. potential-benefits-cannabis.png CBD and cannabis have been at the center of much talk about their therapeutic potential in recent years. As the benefits of these natural compounds become unveiled through more research, more individuals embrace them as a natural remedy for various health conditions. Once shrouded with different misconceptions, the medical community is exploring CBD and cannabis because of their potential effects on the body and mind. This article discusses the science behind these compounds, highlighting potential advantages while considering the role they can play in promoting health and well-being. (more…)
Author Interviews, Cannabis, JAMA / 25.01.2025

MedicalResearch.com Interview with: Silvia S. Martins, MD, PhD Associate Dean for Faculty Professor of Epidemiology Director, Substance Use Epidemiology Unit Co-Director, Substance Abuse Epidemiology T32 Program Department of Epidemiology Columbia University Mailman School of Public Health New York, NY MedicalResearch.com: What is the background for this study? Response: Much has been speculated on whether the enactment of medical and recreational cannabis laws can have a role in decreasing prescriptions for opioid pain relievers, opioid use and misuse, opioid use disorder, and overdose in the U.S. However, findings on the associations of medical cannabis laws alone and recreational cannabis las + medical cannabis laws with opioid-related outcomes are mixed. By the end of 2019, 32 U.S. states had adopted medical marijuana laws (MCL) alone. All states that went on to adopt recreational marijuana laws (RCL) had previously adopted an MCL. (more…)
Author Interviews, Cannabis, JAMA, Mental Health Research / 22.11.2024

MedicalResearch.com Interview with: Belén Blasco PhD Student in Neuroscience - MD Psychiatry Clinical and Translational Sciences (CaTS) Lab Integrated Program in Neuroscience McGill University | Douglas Research Centre Montreal, Canada MedicalResearch.com: What is the background for this study? Response: Our research is centered on uncovering the early brain changes that might contribute to psychosis development. Using innovative brain imaging techniques, we aimed to measure synapsis in individuals with early psychotic symptoms or who are considered at high clinical risk. Synapses are the crucial points of connection between neurons, allowing communication across the brain. A key aspect of our study was to understand how lifestyle factors, like cannabis use, might impact these brain changes, particularly since cannabis consumption has been associated with an increased risk of developing psychosis in young people. (more…)
Cannabis, OBGYNE, Pediatrics / 30.10.2024

MedicalResearch.com Interview with: Sarah Keim, PhD Associate Professor, Epidemiology College of Public Health The Ohio State University MedicalResearch.com: What is the background for this study? Response: Marijuana is the illicit substance most commonly used during pregnancy, and use is increasing. Some evidence suggests that marijuana is associated with deficits in executive function and increased delinquent behavior in school-age children and adolescents, with potential downstream impacts on achievement and social functioning. However, this evidence comes largely from only 2 studies several decades old. Today cannabis is more than 10 times more potent than it was several decades ago. (more…)
Addiction, Author Interviews, Cannabis / 05.08.2024

MedicalResearch.com Interview with: Luke Cavanah, BS Department of Medical Education Geisinger Commonwealth School of Medicine Scranton, PA 18509 MedicalResearch.com: What is the background for this study? Response: Amphetamine, lisdexamfetamine, and methylphenidate, are first-line treatments for attention-deficit hyperactivity disorder (ADHD) and are classified as Schedule II stimulants due to their risk of addiction. (1–3) There has been high and increasing use and misuse of these medications with inadequate explanation. (4)  Since chronic cannabis use can result in similar cognitive effects as ADHD 5–7, we wondered if more stimulants were prescribed for what appeared to be ADHD but was a consequence of chronic cannabis use. In other words, has the legalization of cannabis contributed to this inadequately explained increase in stimulant use? A recent study by our lab group that looked at the slopes of stimulant distribution rates over time -- before and after medical cannabis legalization -- did not support this.(8) Given the prevalence and increasing legalization of recreational cannabis, we wanted to determine how slopes of stimulant distribution rates compared before and after recreational cannabis legalization. (more…)
Cannabis, Technology / 03.07.2024

In recent times, the lawn of the marijuana market has undergone a massive change, with one product in particular standing out. These smooth, concealed apparatuses have quickly become popular, capturing both old and new souls. The popularity of THC Pen raises pertinent issues about what makes them so widespread among users than other products in the industry. This text tackles this phenomenon by looking at what is drawing many people to these products, how practical they are, and what kind of customers prefer buying THC pens over all other types in today’s day cannabis market.  

Factors Contributing  To The Success Of  THC Pens

The rise of THC pens: a phenomenon explained

THC pens have become extremely popular due to their ease of use, portability, and discreteness. Unlike traditional methods of smoking cannabis, pens provide a more portable and odorless way to consume the drug, which can appeal to a broader audience than seasoned users. This rise has been blamed on changing societal attitudes towards marijuana as well as its legalization in various regions, thus making it commonplace among many individuals. Moreover, their sleek designs and user-friendly traits have made them accessible even to novices who may fear other ways of administration. Consequently, this has made them dominate the cannabis market, thereby showing a paradigm shift in how cannabis products are consumed and perceived. (more…)
Author Interviews, Cannabis, Education / 27.06.2024

MedicalResearch.com Interview with: Ahmed El Fatmaoui Ph.D. Candidate Department of Economics University of Oklahoma Norman, Oklahoma MedicalResearch.com: What is the background for this study? Response: The impetus for this research was the growing trend of recreational marijuana legalization (RML) and its potential impact on higher education. With increasing marijuana use among college students, it was crucial to understand how RML might influence college enrollment decisions. Specifically, it is important to examine whether recreational marijuana is regarded by some students as another college amenity, similar to Greek life and other amenities. (more…)
Accidents & Violence, Aging, Author Interviews, Cannabis, JAMA / 19.01.2024

MedicalResearch.com Interview with: Patricia Di Ciano, PhD Scientist, Institute for Mental Health Policy Research, Centre for Addiction and Mental Health Assistant Professor, Department of Pharmacology and Toxicology University of Toronto Campbell Family Mental Health Research Institute Collaborative Program in Neuroscience MedicalResearch.com: What is the background for this study? Response: It is now fairly well established that cannabis has a detrimental effect on driving. The most consistently reported effect of cannabis on driving is to increase ‘weaving’ on the road. We know that cannabis use is on the rise in people over 65 years of age. In fact, over the past few years cannabis use is increasing the most in this age group. Despite this, there are few studies of the effects of cannabis on people over 65; most studies have been conducted on younger adults. We know that there are important age-related changes in the way the body works that may alter the impact of cannabis on the body. Also, older adults may have more experience with cannabis and this can change the effects of cannabis. (more…)
Author Interviews, Cannabis, Medical Imaging, Pulmonary Disease / 10.12.2023

MedicalResearch.com Interview with: Jessie Kang, MD, FRCPC Assistant professor Department of Diagnostic Radiology Faculty of Medicine Dalhousie University   MedicalResearch.com: What is the background for this study?
  • Marijuana is the most widely used illicit psychoactive substance in the world.
  • Use has increased in Canada since legalization of non-medical marijuana in 2018.
  • It is commonly believed that smoking marijuana is not harmful to the lungs. There is an abundance of established research that identifies the harms of cigarette smoking. In contrast, very little is known about the effects of marijuana smoking, and even less research has been done on the combined effects of smoking marijuana and cigarettes.
To determine the effects of marijuana and cigarette smoking, we examined the chest CT images of four patient groups: non-smokers, cigarette smokers, marijuana smokers, and combined marijuana and cigarette smokers. Marijuana smokers included in the study had smoked marijuana at least four times a month for two years. Patients who ingested marijuana via edibles or oral drops were excluded from the study. (more…)
Author Interviews, Cannabis / 30.08.2023

MedicalResearch.com Interview with: Luke Cavanah, BS Geisinger Commonwealth School of Medicine Scranton, PA MedicalResearch.com: What is the background for this study? Response: It is well-known that schedule II stimulants, which are those that are highly addictive and include amphetamine, methylphenidate, and lisdexamfetamine, have had increasing use and misuse in the US. Despite understanding the presence of this phenomenon, the reason for it is poorly understood. The purpose of this study was to see if rising rates of schedule II stimulants are related to the legalization of medical marijuana. We were interested in this because schedule II stimulants are primarily used as the treatment for attention-deficit hyperactivity disorder (ADHD), chronic cannabis use has been demonstrated to cause neurocognitive deficits resembling that of ADHD, and the conditions have been shown to affect similar brain regions. (more…)
Author Interviews, Cannabis, JAMA, OBGYNE, Pediatrics / 26.06.2023

MedicalResearch.com Interview with: Alex P. Miller, PhD TranSTAR T32 Postdoctoral Fellow Department of Psychiatry Washington University School of Medicine St. Louis, MO   MedicalResearch.com: What is the background for this study? Response: Adolescent cannabis use is increasing in the United States. Prior research suggests that people who start using cannabis earlier are more likely to engage in problematic use and also experience greater mental health challenges and socioeconomic disadvantages overall. For example, children who begin using cannabis early are more likely to have behavioral problems and disorders and are more less likely to complete school. In our study, we used data from the Adolescent Brain Cognitive Development (ABCD) Study, which is following nearly 12,000 kids across the nation to track behavior and brain development as well as health from middle childhood to young adulthood. We looked at what factors are associated with the initiation of cannabis use by age 12-14. (more…)
Author Interviews, Cannabis / 24.05.2023

MedicalResearch.com Interview with:   Tara M Lovestead, PhD, (She/her/hers) Group Leader | Fluid Characterization Group Applied Chemicals and Materials Division National Institute of Standards and Technology Gaithersburg, MD   MedicalResearch.com: What is the background for this study? Response: In 2012, when cannabis was decriminalized for adult recreational and medical use in Colorado, I started thinking about how a cannabis breathalyzer could work. I knew that an alcohol breathalyzer model would be pursued for a field sobriety test, but also knew that THC, the main psychoactive compound in cannabis, was a completely different animal, chemically speaking, than ethanol, the intoxicant in alcohol. I began by measuring the vapor pressure of THC and determined that it is a million times less volatile than ethanol. This is why the main strategy for measuring THC in breath is based on collecting breath aerosols with filters (ethanol is measured as a vapor in breath and does not need to be “collected”). My colleague, Dr. Kavita Jeerage and I began working together to design a study using a simple device that samples breath aerosols that hadn’t been used before. We designed this as a small study to piggyback on a larger study with our collaborator Prof. Cinnamon Bidwell at the University of Colorado, Boulder. Bidwell’s experience studying the effects of legal market cannabis product use on psychology and behavior was leveraged to launch the pilot study. (more…)
Addiction, Alcohol, Author Interviews, Cannabis, Education, JAMA, Pediatrics, Social Issues, UCLA / 06.10.2022

MedicalResearch.com Interview with: Mitchell Wong, MD PhD Professor of Medicine Executive Vice Chair for Research Training Department of Medicine Executive Co-Director, Specialty Training and Advanced Research (STAR) Program Director, UCLA CTSI KL2 Program UCLA Division of General Internal Medicine and Health Services Research Los Angeles, CA 90024 MedicalResearch.com: What is the background for this study? Response: It is estimated that social factors like poverty, education, and housing have a large impact on health. Yet, there are few interventions that exist to directly address those issues.  Schools are a promising solution since society already invests heavily in education and schools are an everyday part of most children’s lives. (more…)
Author Interviews, Cannabis, Fertility / 30.11.2021

MedicalResearch.com Interview with: Kanako Hayashi PhD Associate Professor Associate Director, Center for Reproductive Biology Washington State University MedicalResearch.com: What is the background for this study? Response: There have been several correlative reports showing statistical associations between cannabis use and low sperm counts, dysregulated menstruation, abnormal placentation, preterm birth, stillbirth and offspring psychosis etc. However, the long-term consequences of cannabis use on reproductive functions and how it might impact the next generation have not been examined. In the present study, we examined the generational effects of cannabis vapor exposure on male reproductive function. Vaporization is the most common route of cannabis administration in humans. Therefore, in order to understand the generational effects of cannabis exposure on male reproductive functions, the present study was performed using an inhalation method as an administration route, by which adult male mice were exposed to dry cannabis plants to assess the toxicological effects of cannabis on F0, F1 and F2 male reproductive functions. (more…)
Author Interviews, Cannabis, JAMA / 07.09.2021

MedicalResearch.com Interview with: Mark Anderson, Ph.D. Associate Professor Department of Agricultural Economics and Economics Montana State University, IZA, and NBER  MedicalResearch.com: What is the background for this study? Response: In a previous study that was published in JAMA Pediatrics, we used Youth Risk Behavior Survey (YRBS) data and found that the adoption of recreational marijuana laws (RMLs) was associated with an 8% decrease in the odds of marijuana use among high school students.  This earlier study, however, had pre-legalization and post-legalization data from only 7 states and pre- and post-recreational sales data from only 3 states, calling into question the generalizability of our findings. (more…)
Accidents & Violence, Author Interviews, Cannabis, CMAJ / 06.04.2021

MedicalResearch.com Interview with: Sarah Windle, MPH PhD Student in Epidemiology Department of Epidemiology, Biostatistics, and Occupational Health McGill University (Montréal, Québec, Canada) MedicalResearch.com: What is the background for this study? Response: Concerns have been raised about the potential for increases in impaired driving following the legalization of recreational cannabis use in Canada in October 2018. Data from Statistics Canada suggest that cannabis use in the previous three months increased among adults (15 and older) from 14% before legalization in 2018 to 17% in 2019. Among those users with a driver’s license, 13% reported driving within two hours of cannabis use. While this proportion remained the same before and after legalization, this indicates that the absolute number of individuals who reported driving within two hours of use has increased following legalization (due to an increase in the number of users). (more…)
Author Interviews, Cannabis, JAMA, OBGYNE, Pediatrics / 08.03.2021

MedicalResearch.com Interview with: Erica M. Wymore, MD MPH Assistant Professor, Neonatal- Perinatal Medicine Department of Pediatrics, Section of Neonatology University of Colorado School of Medicine Children's Hospital Colorado Maya Bunik, MD, MPH  |  Professor, Pediatrics Medical Director, Child Health Clinic, Primary Care  |  Breastfeeding Management Clinic Adult and Child Consortium for Health Outcomes Research and Delivery Science (ACCORDS) School of Medicine| University of Colorado Anschutz Medical Campus Children's Hospital Colorado MedicalResearch.com: What is the background for this study? Response: Marijuana legalization has been increasing in the United States, with increasing consumption of marijuana products. Currently, the American Academy of Pediatrics (AAP), American College of Obstetricians and Gynecologists (ACOG) and Academy of Breastfeeding Medicine (ABM) do not recommend marijuana use during pregnancy or lactation due to concerning though limited data on the effects of perinatal marijuana exposure. As there has been increasing prevalence of women using marijuana during pregnancy due to legalization and perceptions of safety, we sought to determine the duration of THC excretion in breast milk among women who had evidence of marijuana use at delivery and abstained post-partum.  (more…)
Author Interviews, Cannabis / 03.02.2021

MedicalResearch.com Interview with: Benjamin J. Warnick, PhD Assistant Professor of Entrepreneurship Carson College of Business Washington State University Vancouver MedicalResearch.com: What is the background for this study? Response: Popular culture has perpetuated a notion that cannabis users are more creative. Along these lines, some successful CEOs and entrepreneurs—like Steve Jobs, for example—have claimed that cannabis use has benefitted their creativity at work. Despite such claims and increased legalization and use of cannabis, the implications of cannabis use for entrepreneurs’ creativity has yet to be rigorously tested. My coauthors and I were very intrigued to dive into the implications of cannabis use for entrepreneurs, whether good or bad. This seemed all the more relevant given the increasing legalization, destigmatization, and use of cannabis.  (more…)
Author Interviews, Cannabis, UCSF / 15.01.2021

MedicalResearch.com Interview with: Eric R. Pedersen, Ph.D. Adjunct Behavioral Scientist, RAND Associate Professor of Psychiatry and Behavioral Sciences Keck School of Medicine University of Southern California MedicalResearch.com: What is the background for this study? Response: In November of 2016, CA voted to legalize cannabis for sale and possession to adults 21 and older for recreational use. It wasn’t until January of 2018 that stores in most parts of LA County (we call these “outlets”) were legally able to begin selling recreational cannabis. We were collecting data from about 2,500 young adults in LA County as part of a longitudinal study (Principal Investigator Elizabeth D’Amico at RAND) and were able to look at cannabis use and intentions assessed at a period prior to the opening of the recreational cannabis outlets (pre-January 2018) to a period when those outlets were open (after January 2018). It has been suggested that once cannabis was more available for recreational purchase (and not just for medical purposes among those enrolled in CA’s medical marijuana program), use of cannabis among young adults would increase.  (more…)
Accidents & Violence, Author Interviews, Cannabis, JAMA / 24.12.2020

MedicalResearch.com Interview with: Li Li, MS, PhD Candidate Division of Epidemiology, College of Public Health, Ohio State University Graduate Research Associate, Center for Injury Research and Policy The Abigail Wexner Research Institute at Nationwide Children’s Hospital MedicalResearch.com: What is the background for this study? Response: Marijuana use impairs cognitive abilities necessary for safe driving, including reaction time, road lane-tracking ability, and attention maintenance. Given increasing legalization of marijuana use in the US, our study aimed to estimate marijuana-impaired driving among teens at a national level and help to identify the current prevalence to guide future intervention programs. (more…)
Author Interviews, Cannabis / 09.10.2020

MedicalResearch.com Interview with: Christopher Kaufmann, PhD Co-first author of the study and assistant professor Division of Geriatrics and Gerontology in the Department of Medicine UC San Diego  MedicalResearch.com: What is the background for this study? What are the main findings? Response: We examined cannabis use by older patients seen in our geriatrics clinic at the University of California San Diego. We surveyed patients who came to our clinic for routine care, and found that 15% of those surveyed had used cannabis within the past 3 years. Half of users reported using cannabis regularly and most used for medical purposes. The most common targeted conditions were pain, problems sleeping, and anxiety, and patients found cannabis to be helpful in treating these conditions. We also found that 61% had initiated cannabis use after age 60, and these new users engaged in less risky consumption practices than current users who also used earlier in life.  (more…)
Author Interviews, Cannabis, JAMA, Tobacco Research / 07.10.2020

MedicalResearch.com Interview with: Isabella Lanza, PhD Associate Professor of Human Development California State University, Long Beach   MedicalResearch.com: What is the background for this study? What are the main findings? Response: This is the first study to examine both nicotine vaping and cannabis vaping trajectories across adolescence and young adulthood, which allowed us to assess whether poly-substance vaping is common among adolescents and young adults. Poly-substance vaping (nicotine and cannabis vaping) was reported among a significant proportion of participants in the study (25% were identified as poly-substance vapers). For those that either escalated to frequent nicotine vaping use in adolescence or initiated frequent nicotine vaping use in young adulthood, the probability of engaging in cannabis vaping was very high (85%+).    (more…)
Author Interviews, Cannabis, Pediatrics / 02.10.2020

MedicalResearch.com Interview with: Heather Breeze Clayton, PhD, MPH Senior Scientist, National Center for Injury Prevention and Control CDC MedicalResearch.com: What is the background for this study? Response: Thirty-three states and the District of Columbia now have policies in place legalizing marijuana for medical or adult use. While the health effects of marijuana use continue to be studied, substantial evidence suggests that a number of health risks – including cognitive and mental health outcomes- are made worse by earlier initiation of marijuana, and heavier use patterns. Scientific knowledge about the association between marijuana use and other health and risk-taking behavior in youth is still evolving. Accordingly, we sought to use nationally representative data from the Youth Risk Behavior Survey to assess what the relationship is between different patterns of marijuana use in youth (more established use vs. non-established use patterns) and a number of risk-taking and violence related behaviors. (more…)