Study by Professor Wayne Hall destroys argument that cannabis is harmless. The terrible truth about cannabis http://t.co/jxQU9CDqlD
— Jackie Sperling (@SperlingJackie) October 7, 2014
- One in six teenagers who regularly smoke the drug become dependent on it,
- Cannabis doubles the risk of developing psychotic disorders, including schizophrenia,
- Cannabis users do worse at school. Heavy use in adolescence appears to impair intellectual development
- One in ten adults who regularly smoke the drug become dependent on it and those who use it are more likely to go on to use harder drugs,
- Driving after smoking cannabis doubles the risk of a car crash, a risk which increases substantially if the driver has also had a drink,
- Smoking it while pregnant reduces the baby’s birth weight.