Long-term effects
Long-term effects develop gradually over time with frequent (daily or almost daily) use that continues over weeks, months, and/or years. Long term effects can include:
- difficulty concentrating
- reduced memory and attention span
- problems with school and work
- Inability to think and make decisions
- psychological dependence and possible physical dependence
- worsening of mental health issues, such as depression and anxiety
Long-term effects appear to be worse for youth who start using frequently and early because the effects may not be fully reversible when cannabis use stops.