The news of Demi Lovato’s overdose reignited a national conversation about the enduring struggle of addiction and relapse — an often dangerous cycle that can end in tragedy for many people who struggle with substance abuse.

In this episode, Dr. Oz sat down with renowned psychologist, addiction specialist, and former addict himself, Dr. Adi Jaffe to break down the anatomy of addiction, how to stop it before it starts, and what to do if someone you love is in danger.