Why Is the Drug “HEROIN” Referred to as “JUNK” and “SMACK ” ?

Question by SECRET DESTROYER: Why is the Drug “HEROIN” referred to as “JUNK” and “SMACK ” ?
* How did the the slang “Smack” and “Heroin” come about ?

Best answer:

Answer by Debby R
well iknow they used it in the movies and tv in the 70s

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