"Although crack cocaine and powder cocaine have similar chemical compositions and effects, smoking processed crack causes a faster, higher rush that lasts for less time (about 10 minutes, versus 15-30 for powder cocaine). The intensity of the high combined with the efficient method of ingestion—smoking—are the big reasons why addiction rates are dramatically higher for crack than they are for snorted powder. In 2010, there were an estimated 500,000 active crack cocaine addicts in the United States."
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