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improper sample storage or treatment, reagent deterioration, or improper washing technique.
Wiki User
∙ 13y ago
Wiki User
∙ 13y agoFalse-positive results are sometimes seen in persons who have certain antibodies, especially to mouse immunoglobulins (immune cells) that may be used in the test
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Can Warfarin or Coumadin cause a urinalysis to test positive for opiates?
No, warfarin is not an opiate and it is not one of the compounds that is known to cause false positive results in immunoassay type drug tests.
What is the rate of false positive for nicotine testing?
The rate of false positive results for nicotine has not been established but false results can occur for a variety of reasons. Diet, medications, environment, and errors in the lab can cause false positive results on nicotine blood tests.
Will you test positive for meth taking Benadryl?
No, Benadryl (diphenhydramine) will not give a false positive for methamphetamine. However, Benadryl may cause a false positive for methadone in simple immunoassay tests, though more advanced tests can resolve a disputed result.
Whats wrong with Expired pregnancy test?
Your results can be a false-negative or a false-positive.
Can a kidney infection cause a false positive result in a pregnancy test?
Some infections in the kidney can cause false positive dipstick test results but not false negative.
Does Levaquin make a drug screen test-positive?
Levaquin is an antibiotic. Just tell the lab tech that you have recently taken it and they should be able to rule it out of the screening. If you do not inform them, it could potentially show as a false positive for opiates. This is from Levaquins web site: "Some quinolones, including levofloxacin, may produce false-positive urine screening results for opiates using commercially available immunoassay kits. Confirmation of positive opiate screens by more specific methods may be necessary."
Why is a two-step TST done?
Check for false-positive results
How many mammogram results show a false-positive result?
"False positive" readings also are possible, and 5% to 10% of mammogram results indicate the need for additional testing, most of which confirm that no cancer is present.
What can be done to prove a false positive is wrong?
If you mean how can you prove that the drug test results were false, ask for a retest.
Can diabetes cause false positive alcohol test results?
No, diabetes has no effect on blood alcohol content. That depends on what type of test you are referring to... Acetone (or other ketones) in the blood/body, whether because of Diabetes, other illness, or some Diets CAN, and often DOES cause false positive alcohol test results if tested with a Breathalyzer. It may not affect the actual blood alcohol content, but it CAN cause false positive test results... THAT is why the result is called a FALSE positive.
Does zantac cause false positive on urine drug test?
i take zantac 75 and recently took a drug test and tested positive for meth, i have never done meth nor do i want to....Look ,I absolutely know that zantac will cause a false positive for meth! I just failed a drug screen,but if you do so on a "field test" you should require a lab analysis. The enzyme multiple immunoassay test (EMIT) are used and relied on even though the list of everyday OTC meds that can cause false + results are staggering. Watch Yourself!I looked on many websites, and they all said that Zantac will cause a false positive for methamphetamine and amphetamine Check them out, they're interesting: informedcenter.comxpressdrugtest.comdruginfonet.com
Can HIV positive later become HIV negative?
Only if the first HIV test was false positive can the test results change.
