Despite dozens of trials internationally, the evidence on medical cannabis is unconvincing.
NSW is about to embark on the largest and most definitive clinical trial ever of medicinal cannabis for chemotherapy-induced nausea and vomiting.
There is incredible variation between strains of cannabis plant.
AAP Image/QLD Police
The Australian government will now accept licence applications for groups wanting to grow cannabis for scientific and medical purposes. But there's still a lot we don't know about this complex plant.
A variety of medical marijuana strains are seen at a dispensary in Denver in 2011.
With restrictions to cannabis loosening at the state level, research is badly needed to get the facts in order.
Monkey Business Images/Shutterstock
A new study found that people who are high on cannabis are less likely to opt for a task with a larger reward if the task requires more effort.
Mr High Sky/Shutterstock
147m people used the drug last year. We need to know much more about it.