In this conversation, Liam Gilgar discusses the intricate relationship between severe mental illnesses, such as schizophrenia and bipolar disorder, and addiction. He emphasises the prevalence of these conditions, the self-medication hypothesis, and the cyclical nature of substance use and mental health deterioration. The conversation also highlights the importance of recognising warning signs and seeking professional help, as well as the need for integrated treatment approaches that address both mental health and substance use issues.