Cannabis is one of the most widely used drugs in the world. Popular as a recreational drug for thousands of years, it has also been used as a medicine since 2300 BC. Over the last few decades, cannabis users and an increasing number of doctors and scientists have demanded the reform of cannabis laws. But do we know how cannabis works? What effect does it have on the brain? What ill-effects are associated with its use? It there any convincing evidence supporting its use as a medicine? Should it be decriminalised?

Cannabis on the Brain answers these and other questions using the latest scientific information from pharmacology and medicine, using a minimum of technical jargon.