Drug addiction, also called substance use disorder, is a disease that affects a person's brain and behavior and leads to an inability to control the use of a legal or illegal drug or medication. Substances such as alcohol, marijuana and nicotine also are considered drugs. When you're addicted, you may continue using the drug despite the harm it causes. Today Jon is back in the show to share his story about Drug addiction. Push play. https://www.samhsa.gov/ https://www.nami.org/Home