Understanding which groups of children are more likely to smoke cannabis in late adolescence raises interesting questions.
Drug use is down – but that's a long way from the whole story.
The next American administration will have to choose between following Barack Obama's reform course or relaunching the war on drugs, nationally and internationally.
NSW is about to embark on the largest and most definitive clinical trial ever of medicinal cannabis for chemotherapy-induced nausea and vomiting.
The current scheduling of cannabis is not only out of step with the available evidence but is restricting its potential use as a medicine.
We have a reliable and easy-to-use test to measure blood alcohol concentration. But right now we don't have a fast, reliable test to gauge whether someone is too doped up to drive.
The trend toward marijuana legalization is growing, but the legality, or illegality, of cannabis at the federal level hasn't changed at all.
After almost four-and-a half decades and from modest beginnings, the Dunedin study has evolved into one of the most significant long-term tracking studies in the world.
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.
Nine states are deciding whether to legalize marijuana. Yet the drug's prohibition at the federal level has created an unstable financial environment for producers and retailers.
With restrictions to cannabis loosening at the state level, research is badly needed to get the facts in order.
There is strong evidence that cannabis is useful for treating a range of conditions. Legalising small-scale cultivation is a start to helping those in need.
Cannabis has a long history, and its misuse hangs over it like a dark shadow.
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.
Today, there are more than 20 cryptomarkets selling illicit drugs, or more than 55 if single-vendor markets are included.
But is the data misleading?
A South African Olympic silver medallist achieved something remarkable, especially after testing positive for methamphetamine use in 2012. But care needs to be taken in how this narrative is framed.
147m people used the drug last year. We need to know much more about it.
Awareness of social factors, such as society's perpetuation of masculinity, are critical to understanding the interconnections between trauma, disadvantage and substance abuse in young men.
Legal highs are now illegal in the the UK but why has it taken so long for the law to be changed?