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http://www.nlm.nih.gov/medlineplus/ency/article/000946.htm

http://www.intheknowzone.com/substance-abuse-topics/ecstasy.html

http://www.drugfreeworld.org/drugfacts/cocaine/effects-of-cocaine.html

http://addictions.about.com/od/cocaine/a/What-Do-Cocaine-Effects-Feel-Like.htm

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