It's a condition that turns the lives of millions of Americans upside-down: addiction. Whether it's alcohol, drugs, food or gambling, it can ruin lives. In support of National Recovery Month, which calls attention to substance abuse issues and treatment services, Reactions takes a look at the chemistry behind addiction. Source: American Chemical Society This article is not intended to provide medical advice, diagnosis or treatment. Views expressed here do not necessarily reflect those of ConductDisorders or its staff.