This presentation focused on drug checking or pill testing services, which have existed for over 50 years and now operate in more than 20 countries. Despite this long history, little research assessing feasibility or impact has been published in peer-reviewed journals. As more countries trial drug checking services, the number of peer-reviewed evaluations have grown. This seminar detailed key evidence in the literature and remaining scientific and practical questions remaining with a particular focus on the Australian context. [1 hour]