This document discusses whether alcoholism and drug addiction should be considered diseases. It notes that chemicals can be considered addictive if they are mind-altering, reinforcing, and euphoric. It then examines various classes of drugs and their addictive potential. While illegal drugs and alcohol cause many deaths daily in the US, nicotine causes even more. The document explores how viewing addiction as a disease rather than a moral failing can help promote treatment. Brain imaging shows how drugs alter brain function and blood flow in ways that can hijack one's mind and life. Maintaining abstinence is important for recovery due to the chronic, relapsing nature of addiction.