Marc Lewis is a neuroscientist whose work focuses on how drugs affect the brain. He is also a person with lived experience. In this plenary he will discuss: the cycle of addiction, the effects of different drugs on the brain, the role of the environment, and understanding how genetics plays a role in drug use. This session will help us understand our clients at the neurological level. There will be time for Q&As from the audience at the end, so come prepared and get those tough questions answered by the expert.