What could interfer with drug tests?

If you have a history of drug use, you may be asked to submit to drug tests for a court system, a child custody case or an employer.

What if you test positive and you haven't been using?

A false positive drug test reading is possible with urine tests due to foods, prescription or over-the-counter medications already in your system. This is known as cross-reacting. There are several such drugs that have been proven to produce a false positive result. In fact, the Journal of Analytical Toxicology showed error reports of about 10-15% for such drug tests. That’s a pretty big margin of error when the stakes are so high. The error rates are high enough to warrant a good argument for a second test.

At one time, pain relievers which contain ibuprofen, such as Motrin or Advil would cause a false positive for marijuana but this problem has been addressed. Currently, there is no material that will produce a false positive for marijuana. Any medications which contain ephedrine or phenypropanolamine can sometimes test positive for amphetamines, found in products such as Vicks Nasal Spray or Sudafed.

Several types of things can cause a false positive for opiates. Some examples include poppy seeds, the pain reliever Demerol, cough medicines which contain Dextromethorphan and products such as Primatene-M which contains perylamine. A false positive for cocaine can be caused by use of certain antibiotics like amoxicillin and ampicillin. Cold medicines like Nyquil Nighttime can produce a false reading for Methadone.

When filling out the form before your test, consider the substances on the below list. You can note that one or more of these products might be in your system.

Common Substances or Situations leading to falsely positive drug test results:-
Nonsteroidal anti-inflammatory drugs
fluoroquinolones
Vicks Inhaler
Vicks Formula 44M
Dristan Nasal Spray
Sudafed
Poppy Seeds
Nyquil Nighttime Cold Medicine
Passive marijuana inhalation.
Pain relievers such as Advil, Nuprin, Motrin and menstrual cramp medications like Midol and Trendar
Accutrim
Advil
Afrin
Aleve
Allerest
Amfepramone
Amifepramone
Amineptine
Amoxicillin - False positives for cocaine
Ampicillin
Ampicin
Anti-anxiety pills - Many will test positive for Benzodiazepines
Antibiotics - False positives on Heroin Tests
Asthma medications (Marax, Bronkaid tablets, Primatine Tablets)
B2 vitamin
Benzphetamine
Blue Lettuce
Bronkaid tablets
California Poppy
Cathne
Chloropromazine
Clobenzorex
Contac
Contact
Cough medicines - See if any ingredients are on this list
Cough suppressants with Dextromethorphan (DXM)
Cylert
Demerol
Deprenyl
Desoxyephedrine
Dexatrim
Dexdenfluramine
Dexedrine
Dexfenfluramine
Dextroamphetamine
Dextromethorophan
Diabetes
Diazepam (generic name for valium)
Diazepam False positives for PCP
Didrex
Dilantin
Dimetapp
Dristan Nasal Spray
Dronabinol (Marinol)
Elavil - False positives for opiates for up to three days
Eldepryl
Emprin
Ephedra (Ma Haung)
Ephedrine
Ephedrine based compounds
Etafediabe
Excedrin IB
Famprofazone
Fenelylline
Fenfluramine
Fenproyorex
Fioricet and derivatives
Fiorinal
Fluspirilene
Hempseed Oil
Hydroymethamphetamine
Ibuprofen - False positives for Marijuana
Ketoprofen
Kidney disease
Kidney infection
Lettuce - Both Prickly and Blue
Liver disease
Liver infection
Lodine
Lortab - an opioid analgesic
Ma Huang
Marax
Matilija Poppy
Mefenorex
Menstrual cramp medications like Midol and Trendar
Mephentermine
Mesocarb
Methoxyphenamine
Methphenidate
Midol
Mini-thins
Morazone
Mormon Tea
Most prescription pain medications
Motrin
Naproxen
Nasal decongestants - False positives for Amphetamines
Neosynephren
Nuprin
Nyquil
Nyquil Nighttime Cold Medicine - False positives for Methadone up to 2 days
Orudis KT
OTC diet aids with phenylpropanolamine (Dexatrim, Accutrim)
Over-the-counter nasal sprays (Vicks inhaler, Afrin)
Pamprin
Pemoline
Percocet
Percodan
Percovil
Phendimetrazine
Phenegan-D
Phenergan
Phenmetrazine
Phenobarbital
Phentermine
Phenylephrine
Phenylpropanolamine
Pholedrine
Pnenypropanolamine
Poppy seeds
Prescription sleeping pills
Prickly Lettuce
Prickly Poppy
Primatene-M containing perylamine
Primatine Tablets
Promethazine
Promethegan
Propanolamine
Propylephedrine
Pseudo ephedrine
Pseudoephedrine
Quinine water - False positives for opiates
Red Poppy
Redux
Riboflavin
Ritalin
Robitussin Cold and Flu
Selegiline
Sudafed
Tavist-D
Telectin
Tonic water
Trendar
Tylenol Sinus
Tylenol with codeine
Valium
Vicks Formula 44M containing Dextromethorphan
Vicks inhaler
Vicks Nasal Spray
Vicks Nyquil
Vitamin B2
Wygesic

If it truly is a false positive, ask for a second test.

I was attending a suboxone

I was attending a suboxone clinic and i took a urine test and it came back that i had methodone in my system, but the funny thing is, well it's really not funny, but i hadn't done anything but suboxone. I do not recall if i took any over the counter medicine but the doctor, Frank Lyons, in Olive Hill would not even discuss it with me. He just disregarded me. I had taken several drug screens before that and always passed so I'm to this day still wondering how that happened. Although they did not write my name on the cup and they had me sit it down beside all the others in no paticular way. So either they mixed mine up with someone eles's and didn't want to admit they did. I don't recomd this doctor to anyone...

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