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Heroin has a very short half life and will metabolize and exit your system in normally three days (when used occassionally.) It has taken me up to a week to get all of the tar out of my system (from chronic use.)

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14y ago
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12y ago

Absolutely. It takes quite a bit more than a day and a half to clear heroin residue from your system. It will still show up in your saliva.

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Q: If you snorted heroine Wednesday night will it show up on your urine test Saturday afternoon?
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