Addiction is the compulsive physiological need for and use of a habit-forming substance (eg, heroin, nicotine, or alcohol) even when it is physically, psychologically, or socially harmful. It is characterized by tolerance and by physiological symptoms upon withdrawal.
Types of Drugs
Find out more about specific types of drugs:
Treating Drug Addiction
Group therapy: can it help you?
Although many people can't imagine sharing their problems with a group, group therapy is a way for individuals to work on their problems in a protected and confidential atmosphere.
The science of addiction
It is estimated that there are 16 million drug users, 13 million heavy drinkers, and 66 million smokers in the United States. Read here to find out why.
InDepth: Related Conditions
Natural and Alternative Treatments (By Condition)