Marijuana use is divided into two categories, recreational and medicinal. Many states have legalized recreational and/or medical marijuana, but it remains a Schedule I drug, which means you can still be arrested, convicted, and jailed in a federal court. Recreational users seek the “high” they get from the THC (delta-9-tetrahydrocannabinol) in marijuana. THC is a mind-altering ingredient found in cannabis that gives the user a feeling of euphoria and/or relaxation.
In medical marijuana, THC may increase appetite and reduce nausea, which is especially helpful for chemotherapy patients. THC may also help ease pain, inflammation, and problems with muscle control. A second ingredient found in marijuana, CBD, doesn’t make a person high, so it’s more popular in medical marijuana. CBD may help reduce pain and inflammation and has been used to control epileptic seizures, especially in children.
Long-term use of marijuana may cause adverse effects on brain development, especially when used during adolescence. Marijuana may also impact your memory and ability to learn, which may be permanent. Some studies have also linked marijuana use to an increased risk of heart attack and stroke and an increased risk of psychiatric disorders, including anxiety, depression, and schizophrenia.
|Derived From||Dried flowers and leaves of the cannabis plant|
|Ways Used||Smoking, ingesting, dabbing, vaping|
|Scientific Name||Cannabis sativa or Cannabis indica|
|Slang/Street Names for Marijuana||Weed, pot, dope, grass, ganja, reefer, Mary Jane, herb, hash, bud|
|How Long in Bodily System||Varies based on the frequency of use, THC levels in the marijuana, how it’s absorbed into the body, hydration, and metabolism. When smoked, the effects generally last for one to three hours, but when eaten, the effects can last numerous hours.|
THC is detectable between three days and a month or longer in a urine-based drug test, up to 48 hours in saliva, and up to 36 hours in blood.
|Punitive Legal Measures: Using/Possession||Despite medical and/or recreational legalization and decriminalization in numerous states, marijuana remains a Schedule I controlled substance, so use and possession are illegal by federal law. For possession of any amount of marijuana, the first offense is a misdemeanor, with the potential of up to one year of jail time and up to $1,000 in fines. Subsequent offenses result in increased prison time and fines. Third and subsequent offenses may be classified as a felony.|
|Punitive Legal Measures: Selling/Distributing||An individual convicted of cultivating or selling marijuana is charged with a felony and could face up to five years in prison and up to $250,000 in fines for 50 plants or less (cultivation) or 50 kilograms or less (selling). Prison time and fines increase based on the amount in your possession with a maximum penalty of 10 years to life in prison and up to $1,000,000 in fines for 1,000 or more plants or kilograms. If marijuana is sold near a school or other protected area, the penalties double. There is also a penalty of three years jail time for selling marijuana paraphernalia.|
|DEA Drug Rating||Schedule I|
People using marijuana typically experience a pleasant sense of euphoria and relaxation; however, the THC in marijuana affects areas of the brain that influence memory, concentration, thinking, sensory and time perception, movement, and coordination. As a result, marijuana users might experience impaired thinking, which impacts focus and the ability to learn and perform complicated tasks. Because THC also disrupts brain functions that regulate balance, coordination, and reaction time, it’s unsafe for a person under the influence to drive a vehicle, and it’s difficult to play sports.
According to the American Journal of Psychiatry, marijuana use has long-lasting effects on the brains of adolescents and young adults because the brain is still developing. The study showed that adolescents had issues with cognitive development, including recall memory, perceptual reasoning, and inhibition. Lower IQ scores were also a concern, and some studies have suggested the actual structure of the brain may be adversely impacted.
Signs of marijuana abuse may include behaviors, such as excessive eating outside regular mealtimes or compulsive snacking, diminished performance at school or work, and failing to meet responsibilities at home. Abusers may withdraw from their family and friends and spend more time with other people who abuse marijuana. They may also obsess about always having an ample supply of marijuana, causing them to stash the drug everywhere and frequently focus on obtaining more even when they can’t afford it. If a loved one asks about their drug use, the abuser may get defensive.
A person abusing marijuana may also exhibit a compulsive urge to continue using even if it’s having adverse impacts on their life, such as having trouble at home, school, or work or having health or legal trouble. Their compulsion may also extend to using marijuana even when it’s dangerous to do so, such as when driving or operating machinery.
Marijuana abuse may lead to marijuana use disorder. Behavioral signs of marijuana use disorder include using more marijuana for more extended periods and dedicating too much time and resources to marijuana use. Other behaviors may consist of ignoring risks caused by continued use, such as worsening of an existing physical or psychological problem or relationship difficulties.
When you’re high on marijuana, your body may become very relaxed. You may also crave food in what’s referred to as having the munchies, which may be more of a psychological reaction than a physical one. You may experience issues with your motor skills, including walking and talking, much like you would if you were intoxicated by alcohol. Your heart rate may increase while your blood pressure decreases, which may lead to dizziness and/or nausea. Marijuana also causes blood vessels to expand, causing your eyes to appear bloodshot.
Smoking marijuana causes physical effects almost immediately, which can include feelings of euphoria and relaxation. Your heart rate usually spikes within minutes but can continue for several hours. When you eat or drink products that contain marijuana, you experience the same physical effects, but it takes longer. Depending on the strength of the THC in marijuana-laced food or drinks, it may take 30 minutes to an hour before you begin noticing what takes only minutes when you smoke it.
|Short-Term Physical Symptoms|
|Initial (direct effects of drug, within minutes)||Increased heart rate|
Feelings of euphoria and relaxation
|Lingering (one to three hours of taking the drug, including initial symptoms)||Heightened senses|
Distorted sense of time
Impaired motor skills
|Post-Use (several hours to days after use)||Difficulty focusing or remembering things|
The long-term physical effects of marijuana vary based on the frequency of use and potency. Studies suggest that prolonged marijuana use may harm your brain, including adverse changes in the function and structure of the brain, especially in the areas that control decision making, reward, and motivation. Physical effects on your brain may be permanent, even if you quit using the drug.
The World Health Organization (WHO) also warns that chronic use of marijuana may cause you to develop cannabis dependence syndrome, which could affect your daily life functions. Smoking marijuana may also cause injury to the trachea and bronchial tubes, causing a long-term effect on your airway and lungs and leading to acute or chronic bronchitis. Other studies have shown an increased risk of heart attack and stroke.
Some studies even suggest that marijuana may increase anxiety, depression, or schizophrenia and other mental illnesses in some individuals. In rare cases, studies have also shown that chronic marijuana use may lead to cannabinoid hyperemesis syndrome. This condition includes recurring bouts of severe nausea, vomiting, and dehydration that often require medical attention, but symptoms may disappear once you stop using marijuana.
|Long-Term Physical Symptoms|
Including all the above effects for casual use
|Brain harm, including impacted brain development and decreased brain activity|
Increased risk of heart attack or stroke
Underweight or premature newborns
Cannabinoid hyperemesis syndrome
Bronchitis and other acute chest and lung illnesses
Both the National Institute of Drug Abuse (NIDA) and the Substance Abuse and Mental Health Services Administration (SAMHSA) offer in-depth information on both the symptoms and treatment of marijuana addiction.
Marijuana continues to be the most widely used drug worldwide, with the overall estimated number of users showing an increase of roughly 30% between 1998 and 2017. According to the 2019 World Drug Report by the United Nations Office on Drugs and Crime, an estimated 188 million people used marijuana in 2017. While the United States showed the highest increase, other countries also reported increased use.
In Africa, annual marijuana use in 2017 was estimated to be 6.4% of the population aged 15 to 64, with a total of 44.9 million users. West and Central Africa had the highest prevalence of marijuana, including an estimated 10.8% of the population of Nigeria. Marijuana use was higher in the male population of Nigeria with 18.8% men aged 29 to 34 using the drug, but only 2.6% of the female population in the same age range.
While the estimate for marijuana use in Asia was much lower than in other regions, due to the larger population, it accounted for nearly a third of the estimated users worldwide. With only 2% of the population using marijuana, Asia still boasted 54 million users in the region, including 3% of India’s population aged 18 and older. Like Nigeria, marijuana use in India was much higher in men at 5% compared to 0.6% of women between the ages of 10 and 75.
Marijuana use in Western and Central European countries fluctuated over the previous decade, with 6% to 7% of the population between the ages of 15 and 64 using marijuana in the past year. The prevalence of use remained high among young adults in this region, with 5.4% of those aged 15 to 34 using marijuana.
The increase of global marijuana use was most noticeable in North and South America, with 42 million people aged 15 to 64 in 2007, increasing to 57 million in 2017, an increase of about 60%. Of these, more than 40% over the age of 18 claimed to be daily or near-daily users, an amount that has more than doubled over this decade. Higher levels of marijuana use were also reported in Canada, with 9% of the population using in 2011 jumping to 14.7% by 2015.
|Regions With the Highest Number of Marijuana Users||North & South America||Asia||Africa|
|Countries With the Largest Increase in Marijuana Usage Rates||United States (50% since 2017)||Canada (40% between 2013-2017)||Not Available|
|Highest Annual Prevalence of Marijuana Use in Western & Central Europe||France (11.1% in 2016)||Italy (10.2% in 2017)||Spain (9.5% in 2015)|
Marijuana has become closely linked to youth culture, and the age of beginning use is usually lower than for other drugs on a global level. This is also true in the United States, where misuse continues to rise among young adults. The American Health Association stated that daily marijuana use among young adults was at the highest rate in 30 years in late 2017.
According to a 2016 SAMHSA survey, an estimated 24 million or 8.9% of Americans age 12 and older were current marijuana users. Of these, 6.5% or about 1.6 million were adolescents between the ages of 12 and 17. About 1 in 5 young adults between 18 and 25 were reported as current users, which equals 7.2 million or 20.8% of the population in this age group. Among the 7.4 million people aged 12 and over who had an illicit drug use disorder, the most common was related to marijuana, with 4 million people suffering from marijuana use disorder.
|Past Year (2018)||Lifetime|
|8th grade (14-15 yo)||10.50%||13.90%|
|10th grade (15-16 yo)||27.50%||32.60%|
|12th grade (17-18 yo)||35.90%||43.60%|
While many people can use marijuana for a while, then just quit, others develop an addiction to cannabis. Recent data indicates that 30% of marijuana users have some degree of marijuana use disorder, and those who started using the drug before age 18 are four to seven times more likely to develop a problem than adults. As your dependence on marijuana grows, marijuana use disorder becomes an addiction. Like any addiction, you may need help to kick the habit. To learn more about how you can get started on your path to overcoming marijuana abuse, read our Marijuana rehabilitation guide.
If you have a loved one who’s struggling with addiction, staging an intervention is often the first necessary step towards sobriety, but it’s important to be strategic and loving in your approach. Even the most well-meaning of interventions can have a negative effect if they aren’t handled correctly.
|1. Don’t do it alone. A professional interventionist is always the most qualified to guide a successful intervention. Also, rely on non-addict family and friends – especially those who have a close relationship with you or the addict.|
|2. Research Ahead of Time. It’s best to do plenty of research ahead of time to gather insight on the addiction and how it affects the addict. Also, be prepared with local resources for getting help.|
|3. Write Out Your Statement. During the actual intervention, emotions will likely be running high, so it’s best to have a statement of how the person’s addiction has impacted you and your relationship with him or her. These statements should be honest, yet written from a place of love – no personal attacks.|
|4. Offer Help. It’s important for everyone attending the intervention to offer tangible help and support as the person works through detox and rehabilitation.|
|5. Set Boundaries. If the person refuses to seek help and take the next steps outlined, it’s important that they understand that everyone present will end codependence and enabling behaviors.|
Disclaimer: The information contained on Help.org is for informational and educational purposes only and should not be relied upon for any medical or diagnostic purpose. The information on Help.org should not be used for the treatment of any condition or symptom. None of the material or information provided on Help.org is not intended to serve as a substitute for consultation, diagnosis, and/or treatment from a qualified healthcare provider.