The figures don't really add up.
European tokers are still smoking cannabis mixed with tobacco while Americans have shifted to vaping. It's time for Europe to catch up.
Scientists have never found a medicine to help crack users who want to decrease their consumption. Canadian researchers think cannabis might be the answer.
So far, only a few patients have been able to obtain lawful medicinal cannabis, and only after a long and difficult struggle.
Smoking cannabis can cause addition, impaired memory and even psychosis.
Edible marijuana, especially in forms that are appealing to young people, is problematic. Here are things to consider to keep kids safe.
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.