What a Negative Dilute Drug Test Result Means?

A dilute specimen is a urine sample that has higher water content than the average specimen, which minimizes the drug levels visible in the urine. Sometimes dilution is intentional, but it can happen accidentally as well. If the drug levels do not reach a certain cut-off point established by the laboratory, the specimen will not be marked positive for the drug even if it is detected. The creatinine concentration in the urine sample is the primary measurement for identifying dilution, and if the sample contains no creatinine, it can’t be counted as urine. Most normal samples will have a creatinine value between 20-350 milligrams per deciliter. Less than 20 milligrams per deciliter is considered dilute.

How Does A Negative Dilute Test Result Happen?

While it’s true that everyone produces different levels of creatinine concentration, some clients do attempt to drink an excessive amount of water to try and “flush out” their systems of drugs or to simply cheat the test. Some clients also try to cheat the test by adding water to their urine sample cup. To identify diluted urine, laboratories look at several parameters, including the levels of creatinine in the sample. Creatinine is a compound produced when an individual metabolizes creatine.

What to Do When a Test Comes Back Negative Dilute?

First of all, if a test comes back as a positive dilute, that means that the client has drugs in his or her system. It means that while there was more than the usual amount of water in the sample, the presence of drugs was still there. However, if the test comes back as a negative dilute, this does not automatically mean that drugs were present in the urine sample. It simply means there was too much water to tell one way or the other. The laboratory might ask the client to submit another urine sample, and to not drink anything beforehand.

Why Are Diluted Drug Test Results Such a Problem?

Diluted drug test results make it difficult to determine if the participant is using drugs, as they may provide inconclusive results. There are two types of dilute specimens: positive and negative. With a positive diluted drug test, the laboratory picks up the presence of an illegal substance despite its dilution. Whether intentional or accidental, the dilution didn’t hide the drug levels. With a negative diluted test result, it is unknown whether the person had any drugs in their system because there are two possible conclusions. First, the participant may be drug-free but simply consume a lot of fluids. Second, the participant may engage in drug use but successfully disguise this through dilution.

Tips to avoid Negative Dilute Drug Tests

  • Not drinking excessive water which may lead to false negative result as well as sample rejection
  • Advise the client to have 1st morning urine because it is concentrated urine.
  • Schedule random drug testing so that clients cannot plan to dilute their sample beforehand.
  • Do not allow the clients to bring personal items into the testing site, as they might attempt to sneak in water to dilute their sample.
  • Inform the client not to drink water(more than one full glass of water) or any liquid substances(such as coffee, green tea, and black tea)at least before 2 hours of sample collection.

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