What would make a urine drug test invalid?

Invalid Sample “The result of a drug test for a urine specimen that contains an unidentified adulterant or an interfering substance, has abnormal physical characteristics, or has an endogenous substance at an abnormal concentration that prevents the laboratory from completing or obtaining a valid drug test result.”

What happens if you overfill a drug test?

Due to the possibility of false negative results, the ability to detect infections in overfilled samples, and because patients may not return for retesting, we recommend submitting overfilled samples, while also notifying patients to return to retest.

What happens if a drug test is inconclusive?

Inconclusive/invalid– this means that the test detected no amount of the drugs tested for. With an inconclusive result, your employer may choose to have you retake a drug test.

What happens if you add water to your urine test?

Otherwise, the results of the drug test might be inaccurate. Diluted urine occurs when there’s too much water in the urine. It means the urine’s concentration is weak. As a result, the tester will be unable to properly detect the presence of drugs in the urine.

What does an inconclusive urine sample mean?

Sometimes, the result might be “inconclusive.” That means the lab doesn’t have a clear yes or no answer based on your sample. Your doctor may want you to do the test again or have another kind of test.

Is it bad to put water in your urine sample?

A tester analyzes the urine for certain drugs or their metabolites. Metabolites are byproducts formed by the body after it processes a drug. The urine shouldn’t contain too much or too little water. Otherwise, the results of the drug test might be inaccurate.

What happens if you put water in a drug test?

Doing so can alter the results of the urine test and lead to a dilute drug test. (Note that they also might dilute their urine sample by pouring water directly into it.

How much water does it take to dilute a urine sample?

There doesn’t seem to be a consensus on precisely how much water it takes to dilute a urine sample. Some suggest that eight glasses consumed within two hours of a drug test is enough to dilute it. Others put the number at 24 ounces. These are on the more modest side.

What happens if you dilute urine to pass drug test?

Unfortunately, though, it’s widely known that people try to dilute their urine because they consumed drugs and are trying to flush out their system (or in other words, cheat the test). Doing so can alter the results of the urine test and lead to a dilute drug test.

What to do with a negative dilute urine test?

Positive means positive, and you should proceed as an employer accordingly; but if it’s negative dilute, you have a few choices. Firstly, you can require anyone who has a negative dilute to take another urine test, hopefully with less water in their body, as they could still have drugs in their system that went undetected.