Cannabis-Induced Psychosis: What It Is and Who’s at Risk

What Is Cannabis-Induced Psychosis?

Cannabis-induced psychosis is a serious mental health condition that can occur after using marijuana—especially high-potency or high-THC products. It involves losing touch with reality, experiencing hallucinations, paranoia, or delusional thinking, and may require hospitalization.

While many people associate cannabis with calming or euphoric effects, certain individuals may react differently—particularly if they use a lot, start young, or have an underlying vulnerability.

What Are the Symptoms?

Cannabis-induced psychosis may come on suddenly and include:

• Hallucinations (seeing or hearing things that aren't there)
• Delusions (false beliefs, such as being watched or followed)
• Severe anxiety or panic attacks
• Disorganized thinking or speech
• Paranoia or extreme distrust
• Detachment from reality

Symptoms may last for hours, days, or in rare cases, longer—especially if someone already has or is developing a psychiatric condition.

Who Is Most at Risk?

Research suggests the following groups are more likely to experience cannabis-induced psychosis:

• Teens and young adults (under age 25)
• People who use high-potency THC products (concentrates, vapes, dabs)
• Individuals with a personal or family history of schizophrenia, bipolar disorder, or other serious mental illnesses
• Heavy or daily users of cannabis

A 2022 systematic review found that regular cannabis users had a significantly higher risk of developing psychotic disorders—especially when they used potent strains or started in adolescence.

Can It Lead to Long-Term Mental Illness?

Yes. While some people recover fully after the episode ends, cannabis-induced psychosis can be a warning sign for more serious conditions. In some cases, it may be the first indicator of schizophrenia or bipolar disorder. Continued cannabis use can make these conditions worse.

One study found that over 40% of people hospitalized for cannabis-induced psychosis were later diagnosed with a chronic psychotic disorder.

What Should You Do If It Happens?

If you or someone you know experiences symptoms of psychosis after using cannabis:

• Get medical help right away—especially if the person is confused, agitated, or frightened
• Stop cannabis use immediately
• Avoid stimulants or other substances that can worsen symptoms
• Talk to a doctor or mental health professional to determine next steps

If someone becomes a danger to themselves or others, call 911 or go to the nearest emergency room.

Protecting Your Mental Health

Cannabis is legal in California, but that doesn’t mean it’s safe for everyone. To lower your risk:

• Avoid high-THC products and frequent use
• Wait until age 25 or older to use (after brain development)
• Talk to a doctor if you have a mental health diagnosis or family history
• Know the signs of early psychosis and seek help if needed

Concerned about your cannabis use or mental health?‍

Schedule an Appointment with a BASS primary care provider or behavioral health specialist.