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What can cause a false-positive urine test for ecstasy?

What can cause a false-positive urine test for ecstasy?

Drugs that can cause false positives

  • 1) Dextromethorphan. Dextromethorphan is an active ingredient in Robitussin, Delsym, and other over-the-counter cough suppressants.
  • 2) Diltiazem.
  • 3) Diphenhydramine.
  • 4) Metformin.
  • 5) Pseudoephedrine.
  • 6) Labetalol.
  • 7) Methylphenidate.
  • 8) Doxylamine.

What would cause a false-positive for methadone?

Several medications can produce a false-positive result for methadone on the urine drug screen: diphenhydramine, doxylamine, clomipramine, chlorpromazine, quetiapine, thioridazine, and verapamil.

What can cause a false-positive for codeine?

As morphine and codeine are derived from opium poppy seeds, the intake of relatively small amounts of poppy seeds may result in false-positives for opiates, including the consumption of poppy-seed cookies (having ~1 tsp of poppy-seed filling) or poppy-seed bagels.

What can cause a false-positive for tricyclic antidepressants?

False-positive results may occur with the following drugs: Seroquel (quetiapine fumarate), Trileptal (oxcarbazepine), Benadryl (diphenhydramine) at toxic concentrations, Flexeril (cyclobenzaprine), Thioridazine, and Thorazine (chlorpromazine).

What drugs can cause a false positive for benzoylecgonine?

There is an isolated report of antibody-mediated interference in EMIT for benzoylecgonine. However, true positive test results may occur due to drinking herbal tea containing cocaine or application of cocaine as an anesthetic agent during ENT surgery.

Can oxcarbazepine cause a false positive drug test?

So in summary, false positive result in immunoassay was due to oxcarbazepine, and false positive results in GC Mass Spec was due to oxcarbazepine metabolite.

Can supplements cause a failed drug test?

But even an over-the-counter nutritional and dietary supplements could cause a positive result in a NCAA drug test. “The FDA doesn’t regulate any supplements, so anything you buy from health store, branch chain amino acids, protein, it’s really not regulated,” said Christina Horford, a personal trainer.

Can benzocaine cause false positive drug test?

In turn, the misapprehension is created that commonly used dental anesthetics such as benzocaine may yield false positives in urine drug testing, indicating illicit use of cocaine.

What other drugs can cause a positive for Ecstasy?


  • Afrin
  • Alavert
  • Allerest
  • Amfepramone
  • Amineptine
  • Asthma Medications
  • Benzphetamine
  • Bronkaid
  • Cathne
  • What will give you a false positive for methamphetamine?

    Any medication that includes one of these ingredients could cause a false-positive for a methamphetamine drug test. Common medications with these ingredients are cold medicines and nasal decongestants , such as Sudafed, NyQuil, Vick’s Inhaler and Dimetapp.

    What can give false positive for opiates?

    There are a number of things that can cause false positive screening drug tests for opiates including dextromethorphan (a cough medicine), diphendyramine (Benadryl), Quinine (found in small amounts in tonic water) and poppy seeds. Poppy seeds in foods (muffins, pastries etc) can cause a positive opiate drug test.

    What can give you a false positive for cocaine?

    One of the most common antibiotics, amoxicillin (Amoxil), can cause a false-positive test for cocaine. Quinolones , a group of antibiotics including ofloxacin (Floxin), levofloxacin (Levaquin) and ciprofloxacin (Cipro), may produce false-positive tests for amphetamines and opioids.