Can A Urine Test Be Wrong?

What is a false positive urine test?

What is a false positive.

A drug screen tests for the presence of certain illegal drugs and commonly misused prescription medications.

A false positive means that the test has detected the presence of these substances in your body when you haven’t actually taken them..

What does a negative urine test mean?

A negative test merely indicates that, at that biological moment, there was not enough of the tested substance in the urine to make the test positive!

How do you argue a positive drug test?

The best way to contest false-positive results is to reach out to your pharmacist and ask if prescription drugs and OTC medications you take on a regular basis can cause a positive drug test result. Ask if the pharmacist can provide written documentation to this effect and bring a copy to the test site.

Can a urine drug test be wrong?

False-Positive Results. In some cases, a drug test may report the presence of illicit drugs, although none were taken. While this is not common, no test is 100% accurate. Lab errors account for some of the mistakes, but most false-positives may be attributed to over-the-counter drugs and foods that can affect the test.

Can a urine test give a false 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 can cause a false positive on a urine drug screen?

In any drug test, getting a false positive is a real possibility. You can test positive even though you have not actively used a drug. It may bring a false positive after the ingestion of natural, harmless substances. These include food with yeast, cold medication, poppy seeds, ibuprofen, and antiretroviral drugs.

What can cause a false positive alcohol urine test?

Mouthwash and Breath Strips: Most mouthwashes (Listermint®, Cepacol®, etc.) and other breath cleansing products contain ethyl alcohol. The use of mouthwashes containing ethyl alcohol can produce a positive test result. Non-alcohol mouthwashes are readily available and are an acceptable alternative.

What causes a false positive?

In very rare cases, you can have a false-positive result. This means you’re not pregnant but the test says you are. You could have a false-positive result if you have blood or protein in your pee. Certain drugs, such as tranquilizers, anticonvulsants, hypnotics, and fertility drugs, could cause false-positive results.

What can show up as benzodiazepine in a urine test?

A typical benzodiazepine urine test can detect benzodiazepines or their break-down products, called metabolites. But this is a very complex test. A positive test result means that the test found the medicine’s metabolite in your urine at the time the urine sample was taken.

Are urine tests accurate?

No drug test of this type is 100% accurate. There are several factors that can make the test results negative even though the person is abusing drugs. First, you may have tested for the wrong drugs. Or, you may not have tested the urine when it contained drugs.

What is a positive urine test?

ANSWER. If your urine test is positive, it means your kidneys can no longer filter your blood as well as they should. It also shows you have blood vessel disease that could lead to heart problems. From: What Do Urine Tests Say About Diabetes?

How accurate are lab urine drug tests?

99% accurate is not defendable. It leaves reason for doubt that the test could be inaccurate. This makes dismissal of an employee or the non-hiring of an employee difficult to defend if an appeal is made. The FDA approves lab based urine drug testing for employees because it is defendable.

How long does it take for a urine test to come back from the lab?

The test takes only a few minutes to do. You can discuss the results with your healthcare provider right away. A urine test can also be sent to a laboratory. A lab can provide results for routine testing within one to two days.