Marijuana is one of the most commonly used substances in the United States, with usage steadily rising across various age groups, including teens, adults, and even pregnant women. Despite growing acceptance and legalization in several states, the risks associated with marijuana use remain significant, especially for younger users. This article explores marijuana use statistics, addiction potential, and its impacts on mental and physical health, both short and long-term.
How Many People Use Marijuana in the U.S.? Marijuana is the most frequently used federally illegal drug in the United States. In 2021, approximately 35.4% of people aged 18-25 reported using marijuana within the past year. Among high school seniors, nearly 30.7% admitted to using marijuana in the past year, with 6.3% reporting daily use. These numbers highlight a concerning trend: marijuana is becoming increasingly normalized among young people. “Young people today do not consider marijuana use a risky behavior,” a fact that poses significant risks for their health and future.
Recent data indicates that marijuana use among adolescents has declined over the past decade. In 2011, approximately 39.9% of high school students reported having tried marijuana at least once. By 2021, this figure had decreased to 27.8%.
The Centers for Disease Control and Prevention (CDC) warns that cannabis use during adolescence can have adverse effects on a teen’s health and well-being, particularly on the developing brain, which continues to mature until around age 25
Addiction: How Common Is It? Contrary to the widespread belief that marijuana is non-addictive, research paints a very different picture. Approximately 1 in 10 adults who use marijuana will become addicted. However, for those who start using before age 18, the risk increases significantly to 1 in 6. For daily users, addiction rates skyrocket to as high as 50%. Addiction isn’t just about physical dependence; it disrupts relationships, derails academic success, and undermines long-term goals. “Repeated marijuana use can lead to addiction—which means that people have trouble controlling their drug use and often cannot stop even though they want to.”
So if 27.8% of teens try marijuana, and one in six of them become addicted, then your child has about a one in 25 chance of becoming essentially destroyed in high school by marijuana – assuming you are not paying attention.
The Impact of Marijuana Addiction on Teens Teen marijuana use carries especially profound consequences. The adolescent brain continues developing until around age 25, and marijuana can interfere with this critical period of growth. Research indicates that teens who regularly use marijuana are more likely to struggle academically, drop out of school, and face diminished career prospects. Cognitive issues such as difficulty with memory, problem-solving, and maintaining attention are also common. “Compared with their peers who don’t use, students who smoke marijuana tend to get lower grades and are more likely to drop out of high school.”
Marijuana doesn’t just impact school performance. It can also have severe emotional consequences. Studies have shown a strong link between teen marijuana use and mental health disorders like depression, anxiety, and even psychosis. “Cannabis use has been linked to a range of mental health problems, such as depression and social anxiety,” and its effects may be long-lasting.
Mental Health Consequences The connection between marijuana use and mental health cannot be overstated. Long-term marijuana use has been associated with depression, anxiety, and heightened risks of suicidal thoughts. “Studies link marijuana use to depression, anxiety, suicide planning, and psychotic episodes.” For those predisposed to conditions like schizophrenia, marijuana can accelerate the onset of symptoms. High doses of THC, the psychoactive compound in marijuana, have been shown to trigger psychotic episodes, which may or may not resolve after the high fades.
Furthermore, marijuana is often perceived as a harmless way to cope with stress or emotional pain, but this coping mechanism can quickly spiral into dependency. “Using cannabis to cope was linked to experiencing more negative consequences, including trouble remembering things and difficulty concentrating.”
Short-Term Physical Effects The immediate physical effects of marijuana use can range from mildly inconvenient to dangerously impairing:
- Increased heart rate
- Dry mouth
- Dizziness
- Impaired motor skills and coordination
- Altered perception of time and reality
- Nausea
These effects can make simple tasks, like driving or operating machinery, highly dangerous. Marijuana is the most common illegal drug involved in auto fatalities, often in combination with alcohol. “Marijuana makes it hard to judge distances and react to signals and sounds on the road.”
Long-Term Physical Effects The long-term consequences of marijuana use are equally concerning. Chronic marijuana use has been linked to:
- Permanent cognitive decline, particularly in individuals who started using marijuana during adolescence
- Impaired fertility and reduced sperm quality
- Cannabis hyperemesis syndrome, causing severe vomiting and nausea
- Persistent respiratory problems, similar to those caused by cigarette smoking
- Increased risk of heart disease and stroke
Over time, these physical effects can erode a person’s overall health and quality of life. “Smoking marijuana can also increase your risk of stroke, heart disease, and other vascular diseases.”
Marijuana and Pregnancy Marijuana use during pregnancy presents serious risks to fetal development. THC, the psychoactive compound in marijuana, can cross the placental barrier and impact fetal brain development. Consequences may include low birth weight, premature delivery, and cognitive impairments. “Marijuana use during pregnancy may cause fetal growth restriction, premature birth, stillbirth, and problems with brain development.”
The dangers don’t end after birth. THC can pass into breast milk, potentially affecting a baby’s brain development and overall health.
The Changing Landscape of Marijuana Potency Today’s marijuana is far more potent than it was decades ago. The concentration of THC has quadrupled since the 1990s, with some dispensary products containing THC levels exceeding 40%. “The higher the THC amount, the stronger the effects on the brain—likely contributing to increased rates of marijuana-related emergency room visits.”
The normalization and legalization of marijuana have obscured its very real dangers, particularly for young people. Marijuana is not a harmless recreational substance; it carries risks of addiction, cognitive impairment, and severe physical and mental health consequences.
“Using marijuana can affect performance and how well people do in life. Research shows that people who use marijuana are more likely to have relationship problems, worse educational outcomes, lower career achievement, and reduced life satisfaction.”
Education and open conversations are critical. Whether you’re a parent, a student, or an adult user, understanding these risks is the first step toward making informed decisions. If you or someone you know is struggling with marijuana addiction, seek professional help. The consequences—both short and long-term—are far too significant to ignore.
HNZ Editor: We have always been against the legalization of marijuana, in all of its forms. We believe that efforts to legalize it for “medical purposes” are smokescreens to increase recreational use. If completely legalized it is nearly impossible to control, and freely available to teens – who take the risk without knowing the consequences. At least if it is illegal then at least it provides a stigma that prevents some use. Right now 28.7% of teens try it. If completely legal then it will be close to 100%. Which means that the chance of your teen becoming addicted and being destroyed by this are … 1 in 6.
For more information:
https://health.ucdavis.edu/news/headlines/teens-use-cannabis-for-coping-enjoyment/2023/12
https://nida.nih.gov/sites/default/files/teens_brochure_2013.pdf
https://www.cuimc.columbia.edu/news/everything-you-and-your-teenager-should-know-about-cannabis
