Symptoms of cannabis psychosis
Cannabis psychosis means mental symptoms that start after cannabis use. The main signs are paranoia, hallucinations, delusions, and speech that does not make sense. Symptoms begin within minutes to hours of use. Most episodes ease within hours to days after the drug leaves the body.
Dose matters. Average THC in US flower was about 4% in 1995. It is about 15% to 20% today. Concentrates and vape cartridges test at 60% to 90% THC. CDC tracking shows cannabis-related emergency department visits rose after 2019.
Core symptoms
- Paranoia or a sense that other people mean harm
- Hallucinations, most often hearing voices
- Delusions, meaning false beliefs the person holds in place
- Disorganized speech, with jumps between unrelated topics
- Agitation, confusion, or panic
- Feeling detached from the body or surroundings
Acute versus persistent
Acute cannabis psychosis lasts hours to days. Symptoms stop when the drug clears and the person sleeps. Persistent psychosis lasts weeks or longer and can continue after THC leaves the body. A 2023 study of 6.9 million people in Denmark found that up to 15% of schizophrenia cases in men and 4% in women may link to cannabis use disorder.
how to get help for cannabis psychosis
Risk factors
- Family history of schizophrenia or bipolar disorder
- Daily or near-daily use
- First use before age 18
- High-THC flower, dabs, or vape cartridges
- Synthetic cannabinoids such as K2 or Spice
Not every bad reaction is psychosis
A high dose can cause anxiety, fast heart rate, nausea, and dry mouth with no hallucinations or delusions. These signs pass as the drug wears off. Psychosis involves a break from shared reality, which is a different event.
Cannabis and Mental Health Risks: What the Evidence Shows
What to do
Stop use. Move the person to a quiet room with one calm person present. Do not argue with delusions. Call 911 or a crisis line if there is self-harm talk, aggression, or confusion that does not clear. A doctor can rule out other causes such as infection, thyroid problems, or stimulant use.
Cannabidiol
CBD does not cause psychosis. Some trials show high-dose CBD lowers psychotic symptoms. It is not an approved treatment and does not reverse an acute episode.