What does it mean when a drug test comes back negative dilute?

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.

Does negative dilute mean negative?

So, in short, a negative dilute result means that the donor was exceptionally hydrated at the time of the test; and the urine, and everything else it contained, was diluted. What’s tricky with a negative dilute test result is that it’s unknown why the concentration of the specimen was dilute.

What does it mean when your drug test comes back negative?

When a drug is present in such high concentrations that there are no more binding sites left on the antibody, the sample may present with falsely low values. If the low value is below the test cutoff, the result will be negative.

What causes negative dilute?

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.

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How do you avoid a negative dilute?

Tips to help subjects avoid a negative-dilute test result:

  1. schedule the drug test for first thing in the morning.
  2. avoid caffeinated beverages such as coffee or soda.
  3. consume minimal fluids for a six-to-eight hour period before collection.

What happens when a drug test comes back positive?

If the test results in a positive reading, meaning there is drug residue in the body, the results are forwarded to a medical review officer, who reviews the results and looks for any possible valid medical explanation for the results.

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

Dilution. 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.

How do you know if a drug test is negative?

A red or pink colored line next to the word “Control” AND a red or pink colored line next to the word “Drug” indicates a Negative Result for that drug, regardless of how dark or faint the lines may appear. No future testing is required.

Will 2 liters of water dilute urine?

Typically ingesting 1-2 liters or more within an hour of testing is sufficient to dilute most specimens for a 2–6 hour period. Diuretics such as caffeine and cranberry juice and some medications, including water pills may cause diluted urine samples.

Can drinking too much water affect urinalysis?

Preparing for urinalysis

Before your test, make sure to drink plenty of water so you can give an adequate urine sample. However, drinking excessive amounts of water may cause inaccurate results.

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Psychoactive drugs and substances