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 FALSE POSITIVE DRUG TEST INFORMATION

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DEFINITION: A False Positive is a drug free sample falsely being reported as showing positive for drugs.

This can occur for a number of reasons including: improper laboratory procedure, mixing up samples, incorrect paperwork and passive inhalation. But the most common cause of drug testing false positives are cross reactants. A cross reactant is a substance which because of its similar chemical structure to a drug or its metabolite can cause a false positive result.

Drug Test Interaction With Medicines And Foods

Be aware that certain foods and over-the-counter medications can cause you to test "positive" for various kinds of drugs.  Some simple examples are:

  • Poppy seeds, for example, can show up on a drug test as morphine.

  • Cold remedies that contain codeine can also cause a positive result for morphine.

  • Valium reportedly can produce erroneous indications of PCP (Phencyclidine), and other cold remedies can apparently produce false reports of methamphetamine usage.

  • The widespread availability of hemp-containing products, including everything from hemp-seed oil nutritional supplements to hemp-seed candy, cookies, cheese, bread, cooking oil, and general seasoning, means that ingesting ANY of these products could potentially cause a false positive result on a test for marijuana.

Let's take a look at more specifics in the are of false positive drug tests. 

PLEASE READ THIS DISCLAIMER:  Let us first say that not all drug tests are sensitive to all of the following and just ingesting one or more of these ingredients will not guarantee a false positive test.  Also just by saying you have ingested one or more of these ingredients will not automatically dismiss a false positive drug test.  These are just guidelines and should not be taken as absolutes.

THC / Marijuana False Positives

Other Names You Might Know

Marijuana

Blunt

Grass

Herb

Pot

Reef

Sinsemilla

Smoke

Weed

Things That Can Cause False Positives For THC / Marijuana

Over-The-Counter Medications

lbuprofen

Advil

Nuprin

Mediprim

Motrin

Cramp End Tablets

Bayer Select Pain Relief Formula

lbuprin

Medipren

Excedrin IB Caplets

Midol 200

Rufln

Genpril

Pamprin

Naproxen

Haltran

Trendar Cramp Relief Formula

Aleve

Ketoprofen

Orudis KT

Marinol

Over-The-Counter Allergy , Sleep Aids and Anti-Nausea Medications That Contain Promethazine

Phenergan

Riboflavin (vitamin B2)

Edecrin

Promethegan

Dronabinol

 

Prescription Medications

Anaprox

Tolectin

Feldene

Flurbiprofen

Oxaprozin

Indocin

Ansaid

Ifenoprofen

Lodine

Clinoril

Dolobid

Meclomen

Motrin

Nalfon

Orudis

Naprosyn

Relafen

Voltaren

Other Things

Kidney infection

Kidney disease

Diabetes

Liver Disease

Hempseed Oil

 

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Cocaine False Positives

Other Names You Might Know

Coke

Crack

Flake

Rocks

Snow

 

Things That Can Cause False Positives For Cocaine

Amoxicillin

Kidney Infection

Liver Disease

Tonic Water

Kidney Disease

Diabetes

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Amphetamine False Positives

Other Names You Might Know

Biphetamine

Dexedrine

Crosses

Black Beauties

Hearts

 

Things That Can Cause False Positives For Amphetamines

Over-The-Counter Medications That Contain Ephedrine, Pseudoephedrine, Propylephedrine, Phenylephrine or Desoxyephedrine

Nyquil

Contact D

Triaminic 12

Sudafed

Allerest 12-Hour

Ornade

A.R.M.

Tavist-D

Dimetapp

Sinex

Neosynephrine

Actifed

Contact Non-Drowsy Formula Sinus

Dristan Cold Caplets

Bayer Sinus Pain Relief Caplets

Maximum Strength Sine-Aid Tablets

Maximum Strengeth Sudafed Sinus

Maximum Strength Tylenol Sinus

No Drowsiness Sinarest Tabs

Sinus Excedrin Extra Sterength

Characol Sinus

Drixoral Cold and Flu

Efidac/24

Phenegan-D

Robitussin Cold and Flu

 

 

Over-The-Counter Nasal Sprays

Vicks Inhaler

Afrin

 

Over-The-Counter Diet Aids Containing Phenylpropanolamine

Dexatrim Accutrim  

Over-The-Counter Asthma Medications

Marax

Bronkaid tablets

Primatine Tablets

Prescription Medications

Amfeprainone

Cathne

Etafediabe

Phendimetrazine

Morazone

Phenmetrazine

Benzphetamine

Fenfluramine

Redux

Dexfenfluramine

Dexdenflurarnine

Mephentermine

Mesocarb

Methoxyphenamine

Phentermine

Amineptine

Pholedrine

Hydroymethamphetamine

Dexedrine

Amifepramone

Clobenzorex

Fenproyorex

Mefenorex

Fenelylline

Didrex

Dextroamphetamine

Methphenidate

Ritalin

Pemoline

Cylert

Selegiline

Deprenyl

Eldepryl

Famprofazone

 

 

Other Things

Kidney infection

Kidney disease

Diabetes

Liver Disease

 

 

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Opiate False Positives

Other Names You Might Know

Codeine

Tylenol w/codeine

Robitussin A-C

 

Florinal w/codeine

Empirin w/codeine

Heroin

Diacetylmorphine

Horse

 

Smack

 

Methadone

Amidone

Dolophine

 

Methadose

 

Morphine

Roxanol

Duramorph

Opium

Laudanum

Paregoric

 

Dover's Powder

 

Things That Can Cause False Positives For Opiates

Poppy Seeds

Emprin

Tylenol With Codeine

Capital With Codeine

Margesic

Rifampicin

Vicodin

Percodan

Percocet

Wygesic

 

 

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Bencodiazepine False Positives

Other Names You Might Know And Can Cause False Positives For Bencodiazepine

Activan

Halcion

Librium

Valium

Rohypnol

Roofies

Tranks

Xanax

 

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Barbiturate False Positives

Other Names You Might Know

Amytal

Nembutal

Phenobarbital

Barbs

Seconal

 

Things That Can Cause False Positives For Barbiturates

Fiorinol Donnatol  

Over-The-Counter Diet, Sleeping, Anti-Asthamatic Medications That Contain

Phenobarbitol

Dilantin

 

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LSD False Positives

Other Names You Might Know

Acid

Microdot

 

Over-The-Counter and Prescription Migraine Medications

Egotamine

Ergostat

Cafergot

Wigraine

Imitrex

Hydergine

Bromocription

Methysergiside

Lisuride

Lysergol

Artane

Triprolidine

Amitriptyline (Elavil)

Dicyclomine (Bentyl)

 

Over-The-Counter and Prescription Anti-Nausea Medications That Contain Promethazine

Phenergan

Promethegan

 

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Ecstasy False Positives

Over-The-Counter and Prescription Cold Medications

Desoxyephedrine

Pseudoephedrine

Propylephedrine

Phenylephrine

Ephedrine

 

Nyquil

Contact

Sudafed

Allerest

Tavist-D

Dimetapp

Phenegan-D

Robitussin Cold and Flu

Vicks Nyquil

Over-The-Counter Diet Medications With Phenylpropanolamine

Dexatrim

Accutrim

 

Over-The-Counter Nasal Sprays

Vicks Inhaler Afrin

 

Over-The-Counter Asthma Medications

Marax Bronkaid tablets

Primatine Tablets

Prescription Medications

Amfepramone

Cathne

Etafediabe

Morazone

Phendimetrazine

Phenmetrazine

Benzphetamine

Fenfluramine

Dexfenfluramine

Dexdenfluramine

Redux

Mephentermine

Mesocarb

Methoxyphenamine

Phentermine

Amineptine

Pholedrine

Hydroymethamphetamine

Dexedrine

Amifepramone

Clobenzorex

Fenproyorex

Mefenorex

Fenelylline

Didrex

Extroamphetamine

Methphenidate

Ritalin

Pemoline

Cylert

Selegiline

Deprenyl

Eldepryl

Famprofazone

 

 

Other Things

Kidney infection Kidney disease Liver disease
Diabetes    

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