How far does a swab test go back?

Answer

A swab test for saliva usually can detect drugs in the body for the past 5-7 days only. That is the same for blood and urine tests. But the hair follicle test goes back 90 days.
Q&A Related to "How far does a swab test go back?"
5 days.
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30 to 45 days i think.
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THC only stays in your mouth for 1-3 days and
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It depends on the drug that the test is engineered to detect. Drug use other than prescription medication that has been prescribed to you is illegal.
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