10 Serious Risks for Youth Who Use Marijuana


Marijuana is the most widely used illegal drug in the US and world.  Use of marijuana by American youth has surpassed the use of tobacco, and is on track to overcome the use of alcohol in the next few years.

The main concern with cannabis legalization should be with how it will negatively affect children, adolescents and young adults.

One troubling piece of evidence comes from the national Monitoring the Future study, which shows that perceived harm from using marijuana is decreasing among US youth.

Less perceived risk is negatively associated with use.  That means the more youth believe that marijuana is harmless, the more likely they are willing to use it.

In addition, legalization of recreational marijuana use for adults increases access to cannabis products by underage youth and children by illegal or accidental means.

All Americans should be concerned about the increasing potential for marijuana harm among youth resulting from the effects of legalizing marijuana use on its availability, acceptability, and myths about its harmfulness.

Below are 10 key youth marijuana use risks everyone needs know.



Youth Marijuana Risks 

  1. Marijuana Addiction 

One in six adolescents who use marijuana will become dependent.  According to the National Institute on Drug Abuse, youth who start using marijuana before the age of 18 are 4-7 times more likely to develop a cannabis use disorder than those starting to use marijuana later in life (https://www.drugabuse.gov/publications/research-reports/marijuana/marijuana-addictive).  Cannabis use disorder effects can include spending a lot of time using marijuana, giving up other activities to use it, experiencing problems at work and school, having difficulty controlling or cutting down on using it, and experiencing withdrawal effects when abruptly stopping.

  1. Fatal and Nonfatal Overdoses 

While it is extremely rare that an overdose of marijuana will result in death from the toxicity of the substance like is possible with alcohol or opioid use, cannabis overdose is responsible for tens of thousands of emergency hospital visits each year.  Acute symptoms from marijuana overdose can include increased or decreased heart rate, high blood pressure, agitation, anxiety, gastrointestinal problems, and panic.  More concerning are three recently reported deaths, of which two were youth, from consuming cannabis edibles in Colorado where recreational use of marijuana is legal (http://www.foodsafetynews.com/2015/03/third-death-in-colorado-linked-to-edible-marijuana/#.WEM1ToWcHmI).



  1. Impaired Brain Development 

Marijuana exposure during adolescence or younger (e.g., before and after birth) is associated with problems with learning and memory tasks, executive functioning, and reduced verbal memory and possibly IQ.  Functional brain impairment is associated with the age of initiation, as well as how much and how long a person uses marijuana.  Early marijuana consumption is associated with decreased brain size and conductivity.  Early use of marijuana is also associated with more frequent and heavy use of cannabis later in life.  Adverse effects of marijuana on the brain during development may be long-term or even permanent (https://www.drugabuse.gov/publications/research-reports/marijuana/how-does-marijuana-use-affect-your-brain-body).

  1. Mental Health Disorders

There is a correlation (may or may not be causal) between youth marijuana use, particularly heavy use, and the onset of psychosis and schizophrenia.  This is especially the case for youth with a family history of these disorders.  There is also a link between marijuana use and increased anxiety and depression, as well as suicidal thoughts and attempts (https://www.drugabuse.gov/publications/marijuana/there-link-between-marijuana-use-psychiatric-disorders). 



  1. Automobile Crashes

There is an increased risk for automobile crash injury and death for youth and adults who drive after using marijuana.  This is due to marijuana’s effects on impairing reaction time, perceptual-motor coordination, performance attention, information processing, tracking behavior, and diminished response to emergency situations.  This risk is further increased if marijuana is used in combination with other drugs or alcohol. 

  1. Negative Education and Employment Outcomes 

Marijuana use is associated with worse performance in school, including lower test scores and not completing school.  Marijuana’s negative effects on attention, memory and learning can last days or weeks after use, so daily consumption can harm intellectual functioning continually.  Heavy cannabis use is also linked to lower income, welfare dependence, unemployment, criminal behavior, and lower life satisfaction.  


Depressed Boy Studying At Home

  1. Physical Health Problems 

Marijuana consumption is associated with several important health problems.  These include throat and lung irritation, heavy coughs and large airway inflammation, and possible reduced respiratory immune response increasing respiratory infections like pneumonia among regular marijuana smokers.  Marijuana smoke, like tobacco smoke, contains carcinogens that are cancer causing products, but whether cannabis smoking causes cancer is not currently known.  In addition, marijuana use is correlated with a possible increase in Sudden Infant Death Syndrome (SIDS) (https://www.ncbi.nlm.nih.gov/pubmed/11434841/).

  1. Other Drug Use and Disorders 

Youth who use marijuana, especially heavy or frequent use, are more likely to use other illegal drugs.  It is rare for youth to use other illegal drugs without having first used marijuana (as well as tobacco and alcohol).  In addition, youth suffering from cannabis use disorder are at greater risk for having other substance use disorders.  

  1. Wasted Time and Life Problems  

Some of the symptoms of marijuana use disorder include spending too much time using cannabis, as well as giving up or reducing other activities in favor of using marijuana.  Other outcomes from using marijuana, especially daily or nearly daily use, can include experiencing problems at work, school and home, as well as continuing to use cannabis despite experiencing physical, social, psychological or relationship problems.  These symptoms illustrate how marijuana use among youth can develop into a pattern that interferes with a productive, active, healthy, and problem-free lifestyle.



  1. Negative Self-Identity 

The marijuana industry, as witnessed by its online marketing, promotes advantages to living a “stoner lifestyle.”  This type of a lifestyle can expose youth to high risk friends and situations.  In addition, youth who self-identify with a life emphasizing getting high on a regular basis is likely to conflict with the development of healthier and more well-balanced self-images, such as being physically fit, energetic, successful, intelligent, kind, generous, or wholesome.  That’s why some evidence-based marijuana use prevention programs are designed to develop positive, wellness-based self-identities and lifestyles (http://preventionpluswellness.com).


Marijuana use can have a significant negative impact on the mental and physical health, potential for injury and death, education and employment, and personal development of children, adolescents and young adults.  All adults should be gravely concerned about the increasing use of marijuana among young people in the US and throughout the world.

From a purely economic perspective, a quick cost-benefit analysis indicates no benefits to youth or society from young people using marijuana (except possibly for some rare medical therapy), but there are many significant costs to youth, their families and society when children, adolescents and young adults use marijuana.  These costs increase greatly when youth are exposed to marijuana before age 18, and if their use becomes regular and/or heavy.  



Since youth marijuana use is a nearly cost-only economic proposition, we need to do more to protect youth from unchecked online information promoting marijuana use as harmless, and a stoner lifestyle as a positive, normal choice.  Youth have the right to grow up safely, and that means from addiction to the most widely used illegal drug in the world.

Test your overall marijuana knowledge and take the Marijuana Awareness Training Quiz today: http://preventionpluswellness.com/marijuana-awareness-training-quiz/

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2 Responses to 10 Serious Risks for Youth Who Use Marijuana

  1. Thank you. This information is extremely helpful. It will be used in our health awareness program.

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