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Some drug tests are almost instant. Tests for residue on skin for marijuana, cocaine, meth, and several other drugs can be done in real time.

Results for drug tests that employers specify can usually be completed in a day.

Results for criminal drug tests can take much longer.

Toxicology done by the coroner, where so many drug abusers wind up, usually takes 2 or 3 weeks.

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15y ago

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