Nitrous oxide, also known as laughing gas, is a popular drug in the UK and Europe. It has been used for over a hundred years for recreational and medical purposes. The short-term effects include euphoria and heightened senses. However, recent legislation has made possession of nitrous oxide a class C offence due to concerns about its potential harm. A recent review by Back and colleagues suggests that heavy use of nitrous oxide can meet some of the DSM-5 criteria for addiction. The article highlights the need for further research to understand the potential for dependence on this drug. Despite the limitations of the study, it is clear that heavy users of nitrous oxide are at greater risk of developing problems, whether physical or psychological. Therefore, it is important to raise awareness about the potential risks associated with heavy use of nitrous oxide and to consider them in public health messaging and interventions.