CNN Anderson Cooper 360 February 7, 2014 01:17:00
Inside heroin's powerful pull. >> you're using right now? you're high? >> yes. >> when did you last get high? >> probably half an hour ago. >> reporter: 37-year-old we'll call him john says he's used heroin for more than half his life. clean for seven months last year, his body, his brain, unable to say no to the drug. >> what is it about heroin that flips that switch for you? >> i don't know. i don't know. it's like it's like a feeling of love, like that love that doesn't go away. >> reporter: it's love. >> so that's an abscess from using the vein. >> reporter: needing to be fed by another hi...
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