In the past ten years or so there has been a lot of interest to see if medicinal cannabis can help children with emotional and behavioural problems – the ones associated with conditions such as autism, ADHD (attention-deficit hyperactivity disorder) and Tourette syndrome. Australia’s drug regulator confirms doctors are prescribing medicinal cannabis for such conditions. If discussions on social media are anything to go by, some parents want their children to try it when other strategies have not worked. Some teenagers are curious to see if it’s right for them. But there’s not yet a lot of high-quality evidence to support medicinal cannabis for these emotional and behavioural problems. There are also potential safety concerns.