Despite widespread belief to the contrary, people who manage to overcome their addiction to one substance do not become addicted to another substance, results of a large, prospective study show.

Investigators used data drawn from a nationally representative sample of 34,653 adults aged 18 years and older from the National Epidemiologic Survey on Alcohol and Related Conditions. The individuals were interviewed twice, three years apart. The first interview period was from 2001 to 2002, and the second from 2004 to 2005.

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