Marijuana (cannabis) facts at a glance

The signs and symptoms of using marijuana can include:

  • Slow thinking
  • Slow reflexes
  • Reduced coordination
  • Problems concentrating
  • Reduced motivation
  • Dilated pupils
  • Bloodshot or glassy eyes
  • Dryness of the mouth
  • Increased appetite
  • Mood swings
  • Panic attacks
  • Anxiety and paranoia
  • Psychosis
  • Hallucinations
  • Delusions

The consequences of using marijuana may include:

  • Dependence
  • Anxiety and depression
  • Sleep problems
  • Lowered sex drive
  • Learning difficulties and poorer educational outcomes
  • Memory problems
  • Respiratory illnesses such as chronic cough and bronchitis
  • Increased risk of cancer of the lung, mouth, throat and tongue
  • Paranoia and other psychotic symptoms such as hallucinations with increased risk of developing schizophrenia

The National Cannabis Prevention and Information Centre (NCPIC) provides information and advice about cannabis.

Marijuana (cannabis) – printable fact sheet (PDF 102 KB)

If you required an accessible version of this document please contact the National Drugs Campaign Team

This page was last reviewed in March 2014.