2nd October 2019

homehealthtesting
18

Is a faint line on a drug test still negative?

A faint line on a drug test is still a line, so if you have a faint line in the "T" area of the test then you have a negative drug screen. As you can see in the negative test results photos below, the THC strip is much lighter in color than the OXY test strip, but the test result is still negative.

In respect to this, what is the cutoff level for drug tests?

Under the Federal guidelines, drug testing has two cutoff levels for positive detection. That is, labs that follow the guidelines consider drug testing to be negative if detection is below either cutoff level. In the case of urine analysis, drug testing cutoff levels are measured in nanograms per milliliter (ng/ml).
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