Q8. Does marijuana cause psychosis?

A8. There are arguments put forward which claim that long term use of marijuana can lead to psychosis.

Someone who has a family history of psychosis or is considered to be mentally 'vulnerable'may be at risk but this is inconclusive. There are other factors which have to be taken into account.

There is not enough evidence to show a link between long term use of marijuana and psychosis.

If someone has schizophrenia and uses marijuana then this can aggravate their condition, but, it is by no means a given. It can cause a relapse but there is only a small risk of it doing so.

Is there a link between marijuana and schizophrenia? More evidence is needed to prove or disprove this.

For further information visit our marijuana and psychosis section.

FAQS Index : Marijuana FAQ

Marijuana FAQs

1. Q1. Are marijuana and cannabis the same drug?
2. Q2. Is there more than one type of marijuana?
3. Q3. Why is marijuana popular?
4. Q4. Can you become addicted to marijuana?
5. Q5. What are the physical effects of marijuana?
6. Q6. What are the psychological effects of marijuana?
7. Q7. What does marijuana look like?
8. Q8. Does marijuana cause psychosis?
9. Q9. Does marijuana cause cancer?

10. Q10. What is 'medical marijuana?'
11. Q11. Is it illegal to possess marijuana?
12. Q12. What are 'the munchies?'
13. Q13. How is marijuana used?
14. Q14. Can you treat marijuana addiction?
15. Q15. Does using marijuana mean that you will use other drugs?