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Can A Drug Test Be Invalid? [Solved]

An invalid sample is a specimen that is not a suitable for drug testing as it has failed the validity tests for an unknown reason. The lab is unable to identify what is interfering with the tests. It does not mean it has been purposely adulterated but only that something is interfering with the testing.

How Accurate Are Drug Tests?

Drug tests

Cheating on a Drug Test - Specimen Validity Testing

Specimen Validity Testing Specimen validity testing relates to initial testing at a laboratory to determine cheating on the

How to Pass a Drug Test (After Doing Lots of Drugs) | Vanity Code | Vanity Fair

Congrats, you got the job! There’s just one minor problem: your new company wants you to take a