Do drug tests ever come back inconclusive?

Do drug tests ever come back inconclusive?

Drug test results can be inconclusive if the sample is diluted. An inconclusive or diluted drug test result could be a sign that the sample was tampered with, raising suspicion of whether the employee is attempting to avoid detection of drugs by “cleaning out their system.”

Why is my urine sample inconclusive?

Inconclusive test results are those that are not clearly positive or negative. For example, some tests measure the level of antibodies to some bacteria or viruses in blood or other bodily fluid to look for an infection. It is not always clear if the level of antibodies is high enough to indicate an infection.

What is the standard cutoff level for drug tests?

In the case of urine analysis, drug testing cutoff levels are measured in nanograms per milliliter (ng/ml). For example, an initial screening for marijuana must show at least 50 ng/ml, and then confirmatory tests must prove at least 15 ng/ml.

Can you retake an invalid drug test?

Retesting can be an option if there is a possibility of a laboratory error or an insufficient sample. The lab and the Medical Review Officer (MRO) will request a retest.

How can I make my urine drug test inconclusive?


  1. If a tester drinks large amounts of water (at least one gallon) before taking a drug test, urine becomes diluted and metabolites from drugs may become undetectable.
  2. This may cause the first round of results to be inconclusive.
  3. Another method of dilution is adding a drop of water to the sample.

What does it mean inconclusive?

: leading to no conclusion or definite result inconclusive evidence an inconclusive argument.

Will a sip of alcohol show up on a urine test?

Urine vs. Urine tests can detect alcohol long after you’ve had your last drink. These tests look for traces of alcohol metabolites. The average urine test can detect alcohol between 12 and 48 hours after drinking. More advanced testing can measure alcohol in the urine 80 hours after you drink.

Can you sue for a false positive drug test?

If you feel you’ve been the victim of a false-positive drug screen and have been affected, you can file a lawsuit. First, determine a monetary value of your case. If you believe it is under $25,000, your case can be filed in Civil Court.