False Positive Drug Test Facts

False Positive Drug Test Facts

A False Positive Drug Test Should Worry Anyone Undergoing A Drug Test.  A false positive drug test can happen with the urine, hair, saliva or blood test, but it is far more likely with the urine drug test.  With the increased use of onsite, workplace, random and home drug testing kits the chance for a false positive drug test is now a much greater possibility than ever before. 

This Is Serious.  The negative consequences of false positive drug test can include loss of employment, jail time, exclusion from competitive sports, loss of privileges in a probation setting or even inappropriate medical care.

This False Positive Drug Test Is A Dirty Little Secret.  There has been many a person who failed a drug test with no clue as to why and with little or no recourse to prove their innocence.  If you fail due to a false positive result you must prove yourself innocent.  The testers do not need to do anything.  Some testers are very helpful and some are not.

False Positive Causes Are Everywhere. This is often caused by hundreds of products that are wrongly identified as illegal drugs or other drugs of concern.  Common prescriptions, over the counter medications and even foods can cause you to see a false test positive.

How Common Is A False Positive Drug Test?

According to Web MD “Drug tests generally produce false-positive results in 5% to 10% of cases and “Poppy Seeds and Cold Medications Can Trigger False Alarms”.

This Could Happen To You.

  • About 5% to 10% That Fail Are Not Guilty.
  • You Are Judged Guilty – They Don’t Care.
  • You Must Then Prove Your Innocence.

Can Poppy Seeds Cause A False Positive?

The Drug Testing Labs Say It Can Never Happen, but the Myth Busters proved without a doubt it can.  Eating some poppy seed cake or a poppy seed bagel can produce a poppy seed false positive result for opiates according to the “Myth Busters Poppy Seed Drug Test“.  “Can you imagine explaining you do not use heroin, you just ate a bagel”.How to pass a drug test in 24 hours.

Why Are The Testers In Such Denial About The False Positive Drug Test?  Because acceptance would cause all drug test results to be called into question and drug testing is big business.  Admitting the level of this problem would cost a bunch of people a lot of money.

What Can Cause A False Positive Drug Test?

The reasons for a false positive drug test statistics can be caused by a variety of medications, vitamins, foods or even your ethnic background.

  • Prescription Medications such as antibiotics like ampicillin and amoxicillin are prime examples.  Quite a few prescription pain medications should be of immediate concern.
  • Over The Counter Medications such as night-time cold medications can cause a false positive test.  This is particularly true of the liquid cold relievers that contain members of the ephedrine family.  Some common weight loss products are also risky, as well as some nasal sprays and some over the counter asthma products.
  • Foods can sometimes cause a false positive test as proven by the poppy-seed bagel and poppy-seed cake.
  • Common Vitamins Supplements can cause a false positive test.  Riboflavin (B2) might return a false positive test for THC.  Many herbs that contain B vitamins are risky.
  • Diseases such as diabetes, liver disease, and kidney infections may register as a false positive for several drugs of concern.
  • Ethnic Susceptibility – People with dark skin are particularly susceptible to a false positive drug screen.
  • Second Hand Use – Although this is less proven, second-hand use has to be considered for a false positive drug screen.  The testers again say it can not happen.  But we know what their word can be worth.  No sense taking a chance.

How To Make Sure You Pass Your Drug Test?

How To Pass A Drug Test In 24 Hours.

False Positive Drug Test Or Not, You Still Need To Make Sure You Pass Your Drug Test. 

List Of False Positive Drug Test Causes.


The Best Researched False Positive List – Period.

First Of All – Yes, This List Is Real. This data comes from the manufacturer’s own internal documents.  Always Test Clean has assembled the most comprehensive list of what can cause a false positive drug test.  Based upon the testers own internal documents which they call Cross-Reactivity Guides.  NOTE:  The products that can cause a false positive drug test do not necessarily cause one every time, nor with every drug test.  There are many variables that need to be taken into consideration.

What Can Cause A False Positive Drug Test:

Causes Of A False Positive For Amphetamines.


  1. 4-Way Nasal Spray
  2. A.R.M.
  3. AcetAM
  4. Actifed
  5. Adderall
  6. Afrin
  7. Afrinol
  8. Alka Seltzer Plus
  9. Allerest
  10. Amantadine
  11. Amesec
  12. Amfepramone
  13. Amineptine
  14. Amphetaminil
  15. Aralen
  16. Atabrine
  17. Bayer Select Maximum
  18. Benzedrine
  19. Benzphetamine
  20. Biphetamine
  21. Brompheniramine
  22. Bronkaid
  23. Bronkotabs
  24. Bupropion
  25. Caldecon
  26. Captagon
  27. Cathne
  28. Cheracol Sinus
  29. Chiorpromazine
  30. Chloroquine
  31. ClaritinD
  32. Clobenzorex
  33. Contact
  34. Contact Non-Drowsy Formula Sinus Caplets
  35. Contact Severe Cold Formula
  36. Cylert
  37. Deprenyl
  38. Desipramine
  39. Desoxyephedrine
  40. Dexamphetamine Sulphate
  41. Dexatrim
  42. Dexdenfluramine
  43. Dexedrine
  44. Dexfenfluramine
  45. DextroAmphetamine
  46. Dextromethorphan Hydrobromide
  47. Diabetes
  48. Didrex
  49. Dimetapp
  50. Dimethylamylamine
  51. Dinintel
  52. DMAA
  53. Dopergin
  54. Dristan Cold Caplets
  55. Dristan Nasal Spray
  56. Drixoral Cold Or Flu
  57. Durophet
  58. DXM
  59. Efidac/24
  60. Eldepryl
  61. Ephedra Sinica
  62. Ephedrine
  63. Ephedrol
  64. Estasule Minus
  65. Etafediabe
  66. Ethylamphetamine
  67. Eve
  68. Famprofazone
  69. Fen Phen
  70. Fencamine
  71. Fenelylline
  72. Fenfluramine
  73. Fenoprofin
  74. Fenproyorex
  75. Finedal
  76. Fluoxetine
  77. Fluoxetine Hydrochloride
  78. Fluspirilene
  79. Furfenorex
  80. Glucophage
  81. Hydroymethamphetamone
  82. Labetalol
  83. Inderal
  84. Lisuride
  85. Liver Disease
  86. Loratadine
  87. Love Drug
  88. Ma Huang
  89. Maximum Strength Sudafed Sinus
  90. MDA
  91. Mefenorex
  92. Mepacrine
  93. Mephentermine
  94. Metformin
  95. Methoxyphenamine
  96. Methphenidate
  97. Methylenedioxyamphetamine
  98. Mexiletine
  99. Mexitil
  100. Mini-Thins
  101. Morax
  102. Nasal Sprays
  103. Neosynephren
  104. Neosynephrine
  105. Norpramine
  106. Nyquil
  107. Obetrol
  108. Olamine
  109. Ornade
  110. Ortain
  111. Pemoline
  112. Phendimetrazine
  113. Phenegan-D
  114. Phenmetrazine
  115. Phentermine
  116. Phenylephrine
  117. Phenylpropanolamine
  118. Phenypropan
  119. Phenypropanolamine
  120. Pholedrine
  121. Pondinil
  122. Prenylamine
  123. Procainamide
  124. Propranolol
  125. Propylephedrine
  126. Prozac
  127. Pseudoephedrine
  128. Pseudoephedrine
  129. Pseudoephedrineare
  130. Quadrinal
  131. Quelichine
  132. Quelidrine
  133. Quetiapine
  134. Quibron Plus
  135. Quinacrine
  136. Rantidine
  137. Redux
  138. Ritalin
  139. Selegiline
  140. Seroquel
  141. Sinarest
  142. Sinex
  143. Sinus Excedrin Extra Strength Caplets
  144. Sudafed
  145. Tedral
  146. Tegisec
  147. Trandate
  148. Theophylline Calcium Glycinate
  149. Trazodone
  150. Triaminic 12
  151. Triaminicin
  152. Tricyclic Antidepressants
  153. Triprolidine
  154. Tylenol Cold
  155. Tylenol Sinus Gelcaps, Maximum Strength
  156. Vicks Inhaler
  157. Wellbutrin
  158. Zantac
  159. Zyrtec

Peer Reviewed:

Practical Pain Management – Ask the Expert: False Positive Amphetamine Urine Screens

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Causes For A False Positive For Anabolic Steroids.


  1. DHEA
  2. Nandrolone

List of Anabolic Steroids.

  • Testosterone
    • Axiron
    • Androgel
    • Fortesta
    • Testopel
    • Striant
    • Delatestryl
    • Testim
    • Androderm
  • Androstenedione
  • Stanozolol (Winstrol)
  • Nandrolone (Deca-Durabolin)
  • Methandrosteolone (Dianabol)

Peer Reviewed:

Journal of Analytical Toxicology –  Screening for Anabolic Steroids in Urine.

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Causes For A False Positive For Barbiturates.


  1. Acro
  2. Advil
  3. Aleve
  4. Allobarbital
  5. Alphenol
  6. Amytal
  7. Antrocol Elixor
  8. Aprobarbital
  9. Barbital
  10. Butabarbital
  11. Butalbital
  12. Butisol
  13. Dilantin
  14. Donnatal
  15. Fenoprofin
  16. Fioricet
  17. Ibuprofen
  18. Lase Plus
  19. Luminal
  20. Motrin
  21. Mudrane GC
  22. Mysoline
  23. Naproxen
  24. Nembutal
  25. Pentobarbital
  26. Phenobarbital
  27. Phenobarbitone
  28. Phenytoin
  29. Primidone
  30. Rexatal
  31. Secobarbital
  32. Seconal Sodium
  33. Solfoton
  34. Soneryl
  35. Tuinal

List Of Barbiturates

  • Brand Names:
    • Allonal
    • Amytal Sodium
    • Brevital
    • Butabarb
    • Butalan
    • Buticaps
    • Butisol Sodium
    • Luminal
    • Mebaral
    • Mephyltaletten
    • Nembutal
    • Nembutal Sodium
    • Oramon
    • Pentothal
    • Phemiton
    • Prominal
    • Sarisol
    • Seconal
    • Somnifaine
    • Surital
  • Generic Names:
    • Amobarbital sodium
    • Aprobarbital
    • Butabarbital
    • Mephobarbital (methylophenobarbital)
    • Methohexital
    • Pentobarbital
    • Phenobarbital
    • Primidone
    • Secobarbital
    • Thiopental sodium
    • Thyamilal

Peer Reviewed:

National Library Of Medicine – Commonly prescribed medications and potential false-positive urine drug screens.

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Causes For A False Positive For Benzodiazepines (Benzo).


  1. Alprazolam
  2. Anti Anxiety Medication
  3. Anxitol
  4. Ativan
  5. Benadryl
  6. Black Pearls
  7. Briantum
  8. Bromazepam
  9. Centrax
  10. Chinese Herb Pills
  11. Chlorazepate
  12. Chlordiazepoxide
  13. Clobazam
  14. Clonazepam
  15. Clonopin
  16. Clorazepate
  17. Cows Head Pills (Chinese herb)
  18. Dalmane
  19. Daypro
  20. Delorazepam
  21. Demetrin
  22. Diazemuls
  23. Diazepam
  24. Diphenhydramine
  25. Dormonocet
  26. Estazolam
  27. Flunitrazepam
  28. Flurazepam
  29. Frisium
  30. Halcion
  31. Klonopin
  32. Lerisum
  33. Lexotan
  34. Libritab
  35. Librium
  36. Limbitrol
  37. Loprazolam
  38. Lorazepam
  39. Lormetazepam
  40. Medacepan
  41. Medazepam
  42. Miracle Herb Pills (Chinese herb)
  43. Mogadon
  44. Niravam
  45. Nitrazepam
  46. Nobritol
  47. Nobrium
  48. Noctamide
  49. Oxaprozin
  50. Oxazepam
  51. OxPam
  52. Potentsex Pills (Chinese Herb)
  53. Prazepam
  54. Prescription Sleeping Pills
  55. ProSom
  56. Restoril
  57. Rivotril
  58. Rohypnol
  59. Serax
  60. Sertraline
  61. Somnite
  62. Stesolid
  63. Temazepam
  64. Tranxene
  65. Triazolam
  66. Tung Sheuh Pills
  67. Valclair
  68. Valium
  69. Valrelease
  70. Zoloft

List Of Benzodiazepines

  • Chlordiazepoxide (Librium)
  • Clorazepate (Tranxene)
  • Diazepam (Valium)
  • Flurazepam
  • Oxazepam (Serax)
  • Temazepam (Restoril)
  • Clonazepam (Klonopin)
  • Alprazolam (Xanax)
  • Lorazepam (Ativan)
  • Triazolam (Halcion)

Peer Reviewed:

Medscape – Commonly Prescribed Medications and Potential False-positive Urine Drug Screens

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Causes For A False Positive For Cocaine.


  1. Amoxicillin
  2. Ampicillin
  3. Coca Flour
  4. Coca Leaf
  5. Coca Oil
  6. Coca Tea
  7. Diabetes
  8. Lidocaine
  9. Novocain
  10. Tonic Water

Peer Reviewed:

Oxford Academic  – The Clinical Impact of a False-Positive Urine Cocaine Screening Result on a Patient’s Pain Management.

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Causes For A False Positive For Codeine.


  1. Acetaminophen with Codeine
  2. Actifed with Codeine
  3. Ambenyl
  4. Broncholate CS
  5. Cheracol
  6. Codinal PH
  7. DC Cough Syrup
  8. Deconsal
  9. Dimetane
  10. Isoclor Expectorant
  11. Novahistine DH
  12. Novahistine Expectorant
  13. Nucofed ExpecTorant
  14. Par-Glycerol-CV
  15. Pediacof
  16. Phenaphen with Codeine
  17. Phenergan VC
  18. Poly-Histine
  19. Robitussin A-C
  20. Robitussin DAC
  21. Triaminic Expectorant with Codeine
  22. Tussar 2
  23. Tussar SF
  24. Tussi-Organiden
  25. Tylenol with Codeine
  26. Accutrim

Peer Reviewed:

U.S. Pharmacist – The Clinical Impact of a False-Positive Urine CocaineUrine Drug Screening: Minimizing False-PositivesScreening Result on a Patient’s Pain Management.

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Causes For A False Positive For Ecstasy.


  1. Adam
  2. Afrin
  3. Alavert
  4. Allerest
  5. Amfepramone
  6. Amineptine
  7. Asthma Medications
  8. Benzphetamine
  9. Bronkaid
  10. Cathne
  11. Claritin
  12. Claritin Hives Relief
  13. ClaritinD
  14. Clear (Atadine)
  15. Clear Children’s (Atadine Children’s)
  16. Clobenzorex
  17. Contact
  18. Cylert
  19. Deprenyl
  20. Desoxyephedrine
  21. Dexatrim
  22. Dexdenfluramine
  23. Dextromethorphan
  24. Diabetes
  25. Dimetapp
  26. Dopergin
  27. DXM
  28. E (Slang)
  29. Ecstasy (Slang)
  30. Eldepryl
  31. Ephedra Sinica
  32. Ephedrine
  33. Etafediabe
  34. Famprofazone
  35. Fenelylline
  36. Fenproyorex
  37. Lisuride
  38. Liver Disease
  39. Ma Huang
  40. Marax
  41. MDMA
  42. Mefenorex
  43. Mephentermine
  44. Mesocarb
  45. Methoxyphenamine
  46. Methphenidate
  47. Methylenedioxymethamphetamine
  48. Mini-Thins
  49. Morazone
  50. Nyquil
  51. Ohm Allergy Relief
  52. Pemoline
  53. Phendimetrazine
  54. Phenegan-D
  55. Phenhenylpropanolamine
  56. Phenmetrazine
  57. Phentermine
  58. Pholedrine
  59. Primatine Tablets
  60. Propylephedrine
  61. Pseudoephederine
  62. ReduxRitalin
  63. Robitussin Cold Or Flu
  64. Selegiline
  65. Sudafed
  66. Tavist-D
  67. Tylenol Sinus
  68. Vicks Inhaler
  69. Vicks Nasal Spray
  70. Vicks Nyquil
  71. XTC (slang)

Peer Reviewed:

National Library Of Medicine – False Positive For Amphetamine Or Ecstasy.

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Causes For A False Positive For Heroin.


  1. Bronkaid
  2. Nyquil

Peer Reviewed:

National Library Of Medicine – Toxicologic Testing for Opiates: Understanding False-Positive and False-Negative Test Results

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Causes For A False Positive For LSD.


  1. Amitriptyline
  2. Artane
  3. Bentyl
  4. Bromocription
  5. Buproprion
  6. Buspirone
  7. Cafergot
  8. Cardizem
  9. Cephradine
  10. Chlorpromazine
  11. Diltiazem
  12. Doxepin
  13. Efotamine
  14. Elavil
  15. Ergostat
  16. Fentanyl
  17. HaloperidolHydergine
  18. Labetolol
  19. Lisuride
  20. Lysergol
  21. Fentanyl
  22. Fluoxetine
  23. Methamphetaminesysergiside
  24. Methylphenidate
  25. Methysergiside
  26. Metoclopramide
  27. Norpramine
  28. Prochlorperazine
  29. Prozac
  30. Risperidone
  31. Ritalin
  32. Sertraline
  33. Trazodone
  34. Trandate
  35. Triprolidine
  36. Verapamil
  37. Wellbutrin
  38. Wigraine
  39. Zoloft

Peer Reviewed:

Clinical Chemistry – False-Positive Lysergic Acid Diethylamide Immunoassay Screen Associated with Fentanyl Medication

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Causes For A False Positive For Marijuana (Weed – THC – Cannabinoid).


  1. Aciphex
  2. Advil
  3. Aleve
  4. Anaprox
  5. Ansaid
  6. Atripla
  7. B2 Vitamin
  8. Bayer Select Pain Relief Formula
  9. Cannabis Seed
  10. Clinoril
  11. Cramp End Tablets
  12. Datril
  13. Dexlansoprazole
  14. Diabetes
  15. Dolobid
  16. Dopergin
  17. Dronabinol
  18. Edecrin
  19. Efavirenz
  20. Esomeprazole
  21. Excedrin IB
  22. Feldene
  23. Fenoprofin
  24. Flurbiprofen
  25. Genpril
  26. Haltran
  27. Hempseed Oil
  28. Ibuprin
  29. Ibuprofen
  30. Indocin
  31. Lansoprazole
  32. Lisuride
  33. Liver Disease
  34. Lodine
  35. Marinol
  36. Meclomen
  37. Medipren
  38. Mediprim
  39. Midol
  40. Motrin
  41. Naprosyn
  42. Naproxen
  43. Navonaprox
  44. Nexium
  45. NSAIDS
  46. Nuprin
  47. Omeprazole
  48. Orudis KT
  49. Pamprin
  50. Pantoprazole
  51. Phenergan
  52. Prevacid
  53. Prilosec
  54. Promethazine
  55. Promethegan
  56. Proton Pump Inhibitors
  57. Protonix
  58. Rabeprazole
  59. Rabeprazole Sodium
  60. Relafen
  61. Rufin
  62. Shampoo Containing Hemp
  63. Sustiva
  64. Tolectin
  65. Trendar Cramp Relief Formula
  66. Voltaren
  67. Zegerid
  68. Riboflavin
  69. Vitamin B2

Peer Reviewed:

Practical Pain Management – False-Positive Screen for Marijuana

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Causes For A False Positive For MDMA.


  1. Accutrim
  2. Adam
  3. Afrin
  4. Alavert
  5. Amfepramone
  6. Amineptine
  7. Asthma Medications
  8. Benzphetamine
  9. Bronkaid
  10. Cathne
  11. Claritin
  12. Claritin Hives Relief
  13. ClaritinD
  14. Clear (Atadine)
  15. Clear Children’s (Atadine Children’s)
  16. Clobenzorex
  17. Contact
  18. Cylert
  19. Deprenyl
  20. Desoxyephedrine
  21. Dexatrim
  22. Dexdenfluramine]
  23. Dextromethorphan
  24. Diabetes
  25. Dimetapp
  26. Dopergin
  27. DXM
  28. E (Slang)
  29. Ecstasy (Slang)
  30. Eldepryl
  31. Ephedra Sinica
  32. Ephedrine
  33. Etafediabe
  34. Famprofazone
  35. Fenelylline
  36. Fenproyorex
  37. Lisuride
  38. Liver Disease
  39. Ma Huang (Chinese herb)
  40. Marax
  41. MDMA
  42. Mefenorex
  43. Mephentermine
  44. Mesocarb
  45. Methoxyphenamine
  46. Methphenidate
  47. Methylenedioxymethamphetamine
  48. Mini-Thins
  49. Morazone
  50. Nyquil
  51. Ohm Allergy Relief
  52. Pemoline
  53. Phendimetrazine
  54. Phenegan-D
  55. Phenhenylpropanolamine
  56. Phenmetrazine
  57. Phentermine
  58. Pholedrine
  59. Primatine Tablets
  60. Propylephedrine
  61. Pseudoephederine
  62. Redux
  63. Ritalin
  64. Robitussin Cold Or Flu
  65. Selegiline
  66. Sudafed
  67. Tavist-D
  68. Tylenol Sinus
  69. Vicks Inhaler
  70. Vicks Nasal Spray
  71. Vicks Nyquil
  72. XTC (slang)

Peer Reviewed:
University of Rochester
– MDMA Drug Screen (Urine)

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Causes For A False Positive For Methadone.


  1. Advil PM
  2. Doxylamine
  3. Methadose
  4. Physetone
  5. Quetiapine
  6. Seroquel
  7. Tylenol PM
  8. Unisom

Peer Reviewed:

Clinical Chemistry – False-Positive Immunochemical Screen for Methadone Attributable to Metabolites of Verapamil.

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Causes For A False Positive For Methamphetamine.


  1. Accutrim
  2. Adam
  3. Adderall
  4. Afrin
  5. Alavert
  6. Allerest
  7. Amfepramone
  8. Antihistamines In General
  9. Bentyl
  10. Bronkaid
  11. Bupropion
  12. Cathne
  13. Claritin
  14. Claritin Hives Relief
  15. Clear (Atadine)
  16. Clear Children’s (Atadine Children’s)
  17. Combivent Inhaler
  18. Concerta
  19. Contact
  20. Contact Severe Cold Formula
  21. Desoxyn
  22. Dexatrim
  23. Diabetes
  24. Dimetapp
  25. D-Methamphetamine
  26. E (Slang)
  27. Ecstasy (Slang)
  28. Elavil
  29. Eldepryl
  30. Ephedrine
  31. Etafediabe
  32. Fencamine
  33. Fluoxetine
  34. Furfenorex
  35. Glucophage
  36. Gradumet
  37. L-Methamphetamine HCL
  38. Labetalol
  39. Marax
  40. MDMA
  41. Mesocarb
  42. Metformin
  43. Methedrine
  44. Methylenedioxymethamphetamine
  45. Methylphenidate
  46. Morazone
  47. Nyquil
  48. Ohm Allergy Relief
  49. Phenegan-D
  50. Phenergan
  51. Phenhenylpropanolamine
  52. Phenylpropanolamine
  53. Pholedrine
  54. PPA
  55. Primatine Tablets
  56. Prozac
  57. Pseudoephedrine
  58. Sudafed
  59. Pylorid
  60. Redux
  61. Ritalin
  62. Robitussin Cold Or Flu
  63. Selegiline
  64. Sudafed
  65. Trandate
  66. Trazodone
  67. Tavist-D
  68. Vicks Inhaler
  69. Vicks Nasal Spray
  70. Vicks Nyquil
  71. Wellbutrin
  72. XTC (slang)

Peer Reviewed:

Practical Pain Management – Methamphetamine Urine Toxicology: An In-depth Review.

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Causes For A False Positive For Morphine.


  1. A.P.C. w/Codeine
  2. Alavert
  3. Alka Seltzer Plus
  4. Allerest
  5. Ascriptin w/Codeine
  6. Astramoprh PF
  7. Caldecon
  8. Claritin
  9. Claritin Hives Relief
  10. Clear (Atadine)
  11. Clear Children’s (Atadine Children’s)
  12. Coffee Break
  13. Contac Severe Cold Formula
  14. Control
  15. Cremacoat 4
  16. Dietac
  17. Dimetapp
  18. Duramorph
  19. Fiorinal w/Codeine
  20. Infumorf
  21. MS Contin Tablets
  22. MSIR
  23. Norflex
  24. Nyquil
  25. Ohm Allergy Relief
  26. Rescudose
  27. Sinarest
  28. Sine Off
  29. Sinubid
  30. Soma
  31. Soma with Codeine
  32. Triaminicin
  33. Triminicol
  34. Tussagesic
  35. Unisom Nighttime Sleep Aid

Peer Reviewed:

Health Partners – Interpretation of Opiate Urine Drug Screens

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Causes For A False Positive For Opiates.


  1. AcetAM
  2. Amesec
  3. Amisulpride
  4. Amogel PG
  5. Ampicin
  6. Avelox
  7. Benylin
  8. Bronkaid
  9. Bronkotabs
  10. Capital Or Codeine Oral Solution
  11. Cipro
  12. Cipro XR
  13. Ciprofloxacin
  14. Co-Codamol
  15. Codafen
  16. Codafen Continus
  17. Codeine
  18. Codeine Linctus
  19. Codeine Phosphate
  20. Co-dydramol
  21. Cold Remedies with Dextromethorphan
  22. Comtrex
  23. Continus
  24. Cyclimorph
  25. Delsym
  26. Demerol
  27. Dextromethorphan
  28. DHC
  29. Diabetes
  30. Diabismul
  31. Diocalm
  32. Doco Children’s Cough Syrup
  33. Donnagel -PG
  34. Dopergin
  35. Doxylamine
  36. Dristan Cough Formula
  37. DXM
  38. Elavil
  39. Empirin w/Codeine
  40. Enoxacin
  41. Entersan
  42. Ephedrol
  43. Estasule Minus
  44. Ethylmorphine
  45. Factive
  46. Fluoroquinolone
  47. Galenphol
  48. Gemifloxacin
  49. Hamantashen
  50. Hold Cough Suppressant
  51. Hydrostat
  52. InfanTol Pink
  53. Koalin Or Morphine Mixture
  54. Levofloxacin
  55. Lisuride
  56. Liver Disease
  57. Loratab
  58. Lorcet
  59. Lortab
  60. Margestic
  61. Migraleve
  62. Morax
  63. Morcap
  64. Morphine Sulfate
  65. Moxifloxacin
  66. Norfloxacin
  67. Novocain
  68. Nyquil
  69. Ofloxacin
  70. Opazimes
  71. Oramorph
  72. Papaverine
  73. Paracetamol with Codeine
  74. Paramol
  75. Paregoric
  76. Pavacol-D
  77. Pedacare
  78. Pediatric
  79. Pediatric BP
  80. Pefloxacin
  81. Percocet
  82. Percovil
  83. Pholcodine
  84. Poppy Seeds
  85. Preparations
  86. Procaine
  87. Proquin XR
  88. Purim Cookies
  89. Quadrinal
  90. Quelichine
  91. Quelidrine
  92. Quinine in Tonic Water
  93. Remedeine Forte
  94. Rifampicin
  95. Rifampin
  96. Robitussin
  97. Robitussin DM
  98. Romilar
  99. Roxanol
  100. Severedol
  101. Silexin
  102. Solpadol
  103. St. Joseph’s Cough Syrup
  104. Strong BP
  105. Tedral
  106. Thebacon
  107. Theophylline Calcium Glycinate
  108. Trucal
  109. Tussinic
  110. Tylenol 3
  111. Tylenol 4
  112. Tylenol with Codeine
  113. Tylex
  114. Unisom
  115. Vicks Cough Syrup
  116. Vicks Formula 44M
  117. Vicodin
  118. Wygesic

List Of Opiates

  • Codeine
  • Hydrocodone (Vicodin, Hycodan)
  • Morphine (MS Contin, Kadian)
  • Oxycodone (Oxycontin, Percoset)
  • Hydromorphone (Dilaudid)
  • Fentanyl (Duragesic)

Peer Reviewed:

National Library Of Medicine – Toxicologic Testing for Opiates: Understanding False-Positive.

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Causes For A False Positive For Oxycodone.


  1. Hydrocodone
  2. Numorphan
  3. Oxycontin
  4. Oxymorphone
  5. Roxicet
  6. Suboxone

Peer Reviewed:

U. S. Pharmacist – Urine Drug Screening: Minimizing False-Positives and False-Negatives to Optimize Patient Care.

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Causes For A False Positive For PCP.


  1. Advil PM
  2. Aleve
  3. Benadryl
  4. Delsym
  5. Dextromethorphan.
  6. Diphenhydramine
  7. Doxylamine
  8. Effexor
  9. Effexor Tablets
  10. Effexor XL
  11. Ibuprofen
  12. Lamictal
  13. Lamotrigine
  14. Motrin
  15. naproxen
  16. Robitussin
  17. Tylenol Simply Sleeps
  18. Tylenol PM
  19. Tramadol
  20. Ultram
  21. Unisom
  22. Venlafaxine Hydrochloride

Peer Reviewed:

National Library Of Medicine – How Often Do False-positive Phencyclidine (PCP) Urine Screens Occur with Use of Common Medications?

 

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Causes For A False Positive For Phencyclidine.


  1. Chlorpromazine
  2. Coproximal
  3. Darvocet
  4. Dextropropoxyphene
  5. Doxylamine
  6. Meperidine
  7. Venlafaxine

Peer Reviewed:

National Library Of Medicine – How Often Do False-positive Phencyclidine (PCP) Urine Screens Occur with Use of Common Medications?

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Causes For A False Positive For Synthetic Opiates.


  1. Buprenex
  2. Buprenorphine
  3. Darvon
  4. DihyroCodeine
  5. Dilaudid
  6. Dolophine
  7. Homatropine Methylbromide
  8. Hycodan
  9. Hydromorphone
  10. Methadone
  11. Methamphetaminesadone
  12. Numorphan
  13. Oxycodone
  14. Oxymorphone
  15. Paracodine
  16. Percodan
  17. Propoxyphene
  18. Tramadol
  19. Synalgos
  20. Vicodin ES

List Of Semi-Synthetic and Synthetic Opioids

  • Buprenorphine
  • Fentanyl
  • Hydrocodone
  • Hydromorphone
  • Methadone
  • Oxycodone
  • Oxymorphone
  • Tramadol

Peer Reviewed:

Health Partners  – How Often Do False-positive Interpretation of Opiate Urine Drug Screenshencyclidine (PCP) Urine Screens Occur with Use of Common Medications?

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Causes For A False Positive For Tricyclic Antidepressants.


  1. Amitriptyline
  2. Benadryl
  3. Carbamazepine
  4. Chlorpromazine
  5. Cyclobenzaprine
  6. Cyproheptadine
  7. diphenhydramine
  8. Doxepin
  9. Flexeril
  10. Gamanil
  11. Lentizol
  12. Lofepramine
  13. Lomont
  14. Norcyclobenzaprine
  15. Oxcarbazepine
  16. Perphenazine
  17. Quetiapine Fumarate
  18. Sinequan
  19. Seroquel
  20. Thorazine
  21. Thioridazine
  22. Trimeprazine
  23. Triptafen
  24. Trileptal
  25. Tryptizol
  26. Xepin

List Of Tricyclic Antidepressants:

  • Amitriptyline.
  • Amoxapine.
  • Desipramine (Norpramin)
  • Doxepin.
  • Imipramine (Tofranil)
  • Nortriptyline (Pamelor)
  • Protriptyline (Vivactil)
  • Trimipramine (Surmontil)

Peer Reviewed:

ARUP Laboratories – Tricyclic Antidepressant Detection

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References:

List Of Internal Urine Drug Test Manufacturer’s Documents Showing Known Cross Reactants.  Below is a collection of (32) of the most popular urine drug test internal lists of Cross Reactants that can cause a false positive drug tests. The term for a false positive is “Cross Reactant”.  Please note that not all Cross Reactants will cause a false positive with each and every urine drug test. 

You Have Every Right To Ask For The Manufacturer Of The Urine Drug Test You Take.

  1. Acrobiotech False Positive Guide
  2. ADS False Positive Guide
  3. AIT Labs False Positive Guide
  4. Alere False Positive Guide
  5. Burlingtonlabs False Positive Guides
  6. Drug Check False Positive Guide
  7. Ecommunity Physicians False Positive Guide
  8. Howard False Positive Guide
  9. Lewisburg Prison Project.org Bulletins 6.4
  10. Medtox False Positive Guide
  11. Mossman False Positive Guide
  12. Nal-VonMinden False Positive Guide
  13. Oxfordhouse False Positive Guide
  14. Physicians Drugs Guide For False Positives
  15. Redwood Toxicology False Positive Guide
  16. RSI False Positive Guide
  17. RTL False Positive Guide
  18. US Screening Source False Positive Guide
  19. Wakemed False Positive Guide

Back to Cross Reactivity Guide

  1. Journal Of Family Practice – What common substances can cause false positives on urine screens for drugs of abuse?
  2. Drugs.com – Can a Drug Test Lead to a False Positive?
  3. Good RX – These 15 Medications Can Cause a False Positive on Drug Tests.