Narcotics Anonymous (NA) describes itself as a "nonprofit fellowship or society of men and women for whom drugs had become a major problem".Narcotics Anonymous uses a traditional 12-step model that has been expanded and developed for people with varied substance abuse issues. and it is the second-largest 12-step organization. NA describes addiction as a progressive disease with no known cure, which affects every area of an addict's life: physical, mental, emotional, and spiritual. NA suggests that the disease of addiction can be arrested, and recovery is possible through the NA twelve-step program. The steps never mention drugs or drug use, rather they refer only to addiction, to indicate that addicts have a disease of which drug use is one symptom. Other symptoms include obsession, compulsion, denial, and self-centeredness.