An updated third edition of this award-winning book provides a comprehensive overview of the complex associations between cannabis and mental illness. Organised into easy to navigate sections, the book has been fully revised to feature eight entirely new chapters covering important novel aspects. Marijuana and Madness incorporates new research findings on the potential use of cannabinoids, and synthetic cannabinoids, in an array of mental illnesses, balanced against the potential adverse effects. The associations between cannabis and psychosis, developing putative models of 'cannabis induced' psychosis and pathways to schizophrenia are all covered. The book importantly discusses the impact of exposure to cannabis at various stages of neurodevelopment (in utero, in childhood, and during adolescence) and it thoroughly reviews the treatments for cannabis dependence and health policy implications of the availability of increasingly high potency cannabis. This book will quickly become an essential resource for all members of the mental health team.