Patient Education

    Cannabis Use Disorder: What You Need to Know About the Risks of Marijuana

    Understanding Cannabis Use Disorder, how THC affects your brain, and why today's marijuana is far more potent than you think

    Christine M. Forge, MSN, PMHNP-BC, FNP-C
    12 min read
    February 2026

    Have you ever heard someone say, "Oh, it isn't addictive", "I just use it to relax", or "It's better than alcohol"? These are common misconceptions about cannabis that can lead people to underestimate its real risks. Let's get educated about what current research actually tells us.

    What Is Cannabis Use Disorder?

    Cannabis Use Disorder (CUD) is a recognized clinical condition that exists on a spectrum — mild, moderate, or severe. Marijuana addiction is the most severe form. It involves continued marijuana use despite negative consequences, when the brain's reward system takes over and amplifies compulsive marijuana-seeking behavior.

    CUD typically involves an overpowering desire to use cannabis, increased tolerance, and/or withdrawal symptoms when stopping — and it is on the rise.

    DSM-5 Symptoms of Cannabis Use Disorder

    According to the American Psychiatric Association's Diagnostic and Statistical Manual of Mental Disorders (DSM-5), the signs of CUD include:

    1

    Taking cannabis in larger amounts and for a longer time than intended

    2

    Having a strong desire or urge to use cannabis

    3

    Unsuccessful efforts to cut down or control cannabis use

    4

    Spending excessive time obtaining, using, or recovering from cannabis

    5

    Failing to fulfill responsibilities at work, school, or home

    6

    Continuing use despite relationship problems

    7

    Giving up social, occupational, or recreational activities

    8

    Repeated use in physically dangerous situations (e.g., driving)

    9

    Continued use despite known physical or psychological harm

    10

    Developing tolerance — needing more for the same effect

    11

    Experiencing withdrawal symptoms relieved by further use

    How THC Affects Your Brain Chemistry

    The Dopamine Connection

    THC targets the reward center of your brain — the dopamine system. Dopamine is the "feel-good" chemical normally released during positive experiences like a good meal with family. It creates a healthy cycle of seeking rewarding behaviors.

    Marijuana sends massive surges of dopamine through your brain. Instead of feeling motivated for healthy activities (eating, working, socializing), these surges lead to damaging changes that affect your thoughts, feelings, and behavior.

    Over time, this creates an unhealthy drive to seek more pleasure from marijuana and less from healthy experiences. Users often become secluded and withdraw from social interactions. Eventually, the brain becomes desensitized, requiring more cannabis to produce the same effect — this is tolerance.

    Health Effects of Cannabis Use Disorder

    CUD can negatively affect your mental, physical, and social health. Physical and psychological complications include:

    Cannabis-induced psychosis
    Cannabis-induced anxiety disorder
    Cannabis-induced sleep disorder
    Cannabis hyperemesis syndrome
    Chronic bronchitis (smoking/vaping)
    Fertility issues
    Altered brain development
    Cognitive impairment & lower IQ
    Poor educational outcomes

    "Cannabis Is Safer Than Alcohol" — Is It?

    Research shows that most cannabis users actually exhibit the same behaviors as someone legally intoxicated at 0.08 BAC. While cannabis is often perceived as safer than alcohol, it carries its own significant set of risks including psychosis, cognitive decline, addiction, and impaired driving — challenging the notion that it's a harmless alternative.

    Early Warning Signs of CUD

    Poor or decreased cognitive function
    IQ decline
    Increased depression
    Increased suicidal thoughts
    Increased risk for psychotic behavior
    Increased anxiety
    Memory issues
    Attention problems
    Concentration difficulty
    Decline in school performance

    Today's Cannabis Is Not Your Parents' Marijuana

    3–4%

    THC in the 1960s–1980s

    19%+

    Average THC today

    1,375%

    Higher concentration in edibles vs. smoking

    Plant-based THC can reach 20–30%, and synthetics are even more dangerous. This means it takes far less use to produce a stronger response than in previous decades. Edibles are particularly high-risk for overdose due to their extreme concentration and delayed onset of effects.

    Cannabis Withdrawal & Masking Symptoms

    Withdrawal Is Real

    Cannabis withdrawal symptoms are similar to nicotine withdrawal. Daily users should wean off gradually rather than stopping abruptly to manage irritability, anxiety, insomnia, decreased appetite, and cravings.

    Masking, Not Treating

    For conditions people claim cannabis helps with (anxiety, depression, insomnia), research shows it typically masks symptoms rather than treating them. When THC wears off, symptoms often return stronger than before.

    The Only Approved Medical Uses for Cannabis

    Evidence-based approved uses for cannabis are limited to:

    • Chronic pain — such as in stage 4 cancer
    • Neuropathic pain
    • Spasticity — as seen in multiple sclerosis

    Frequently Asked Questions About Cannabis

    Disclaimer: This article is for educational and informational purposes only and does not constitute medical advice. Everyone has the right to make their own choices, but it is our responsibility to ensure you can make those decisions with full knowledge of the consequences — especially regarding long-term use and the effects you may face with aging. Christine M. Forge, MSN, PMHNP-BC, FNP-C does not prescribe cannabis. Always consult with a qualified healthcare provider for personalized guidance.

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    Christine M. Forge, MSN, PMHNP-BC, FNP-C

    Board-Certified Psychiatric Mental Health Nurse Practitioner & Family Nurse Practitioner specializing in integrated mental health and family medicine care. Providing telehealth services across Florida, Wisconsin, and Nevada.

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