As marijuana becomes increasingly normalized and legalized across the U.S., it’s more important than ever to understand the science behind modern cannabis use. While many people still think of marijuana in the context of their youth, today’s products are far more potent, and the health risks have evolved alongside that potency.
Here’s a closer look at the most common marijuana myths, backed by science:
Myth #1: “Marijuana Today Is the Same as It Used to Be”
Reality: Today’s marijuana is significantly more potent than it was in past generations. Advances in plant breeding and extraction techniques have dramatically increased the levels of THC- the main psychoactive compound in cannabis. This isn’t the marijuana your parents or grandparents used.
THC levels have skyrocketed, making modern marijuana a much stronger and riskier substance than in the past.
Myth #2: “Marijuana Is Safe”
Reality: Many assume that marijuana is safer than other substances like alcohol or opioids. But safety depends on more than comparison. High potency THC can be especially risky for individuals with certain medical or psychiatric vulnerabilities.
Those with a family history of addiction or schizophrenia are at increased risk for substance dependence or psychosis.
Regular use can affect multiple organ systems, including the lungs, cardiovascular system, and mental health.
Marijuana can pose serious risks depending on individual health, genetics, potency of the product, and frequency of use. For many, the safest use is no use.
Myth #3: “Marijuana Is Not Addictive”
Reality: Marijuana addiction is very real. The medical term is Cannabis Use Disorder, and it’s recognized in the Diagnostic and Statistical Manual of Mental Disorders (DSM-5). What we reference by addiction medically is the 'ongoing use of a substance despite negative consequences'.
While not everyone who uses marijuana becomes addicted, the risk increases with early use and frequent consumption.
- Around 9% of users will develop an addiction.
- That number jumps to 17% for those who start as teens.
- Among daily users, up to 50% may experience symptoms of addiction.
Marijuana can be addictive, especially for adolescents and those who use it heavily.
Myth #4: “You Can’t Overdose on Marijuana”
Reality: While fatal overdoses from marijuana alone are extremely rare, non-lethal overdoses do happen and often require emergency medical care.
Common marijuana-related ER visits include:
- Psychiatric episodes such as psychosis (paranoia, hallucinations, delusions).
- Cannabis hyperemesis syndrome, which causes uncontrollable vomiting.
- Accidental ingestion by children or pets, especially with edibles.
Dangerous reactions to synthetic cannabinoids, which can cause seizures, liver or kidney damage, and even suicidal behavior.
Overdose is possible, especially with high potency products, synthetic cannabis, or accidental ingestion.
Myth #6: “Marijuana Doesn’t Cause Psychosis”
Reality: Regular marijuana use, especially high-THC products, has been linked to an increased risk of psychotic symptoms, including hallucinations and paranoia. For people genetically predisposed to psychosis, marijuana can significantly accelerate the onset.
A major 2019 study found that:
- THC can worsen existing psychotic symptoms.
- People experiencing psychosis may also turn to marijuana to self-medicate, complicating the relationship between use and mental health outcomes.
Marijuana use is associated with increased risk and earlier onset of psychosis, particularly in vulnerable populations.
Myth #7: “Marijuana Has Proven Medical Benefits for Many Conditions”
Reality: While marijuana is frequently promoted as a natural remedy, the list of FDA-approved uses for cannabis-based products is very limited:
- Chemotherapy-induced nausea and vomiting
- Appetite loss related to advanced HIV/AIDS
- Certain rare forms of childhood epilepsy
Claims about marijuana helping with anxiety, PTSD, or depression remain largely unsupported by clinical evidence. That said, early research into CBD, a non-psychoactive cannabis compound, shows promise in some areas, but we’re still in the early stages of understanding its potential.
The medical value of cannabis is still under investigation. Only a few uses are currently backed by FDA approval and rigorous scientific research.
As marijuana use becomes more widespread, so do the myths surrounding it. At Accredited Drug Testing, we believe in helping individuals, employers, and communities stay informed about the real risks of substance use.
Whether you’re a parent, employer, or healthcare provider, understanding the evolving nature of marijuana- and the science behind it- is essential for making safe, informed decisions.
Need workplace testing, educational resources, or expert consultation? Contact Accredited Drug Testing today.