THC - Substances or Conditions which can cause false positives
Dronabinol (Marinol) 
Ibuprofen; (Advil, Nuprin, Motrin, Excedrin IB etc) 
Ketoprofen (Orudis KT) 
Kidney infection (Kidney disease, diabetes) Liver Disease 
Naproxen (Aleve) 
Promethazine (Phenergan, Promethegan) 
Riboflavin (B2, Hempseed Oil) 
Amphetamines - Substances or Conditions which can cause false positives 
Ephedrine, pseudoephedrine, propylephedrine, phenylephrine, or desoxyephedrine 
(Nyquil, Contact, Sudafed, Allerest, Tavist-D, Dimetapp, etc) 
Phenegan-D, Robitussin Cold and Flu, Vicks Nyquil 
Over-the-counter diet aids with phenylpropanolamine 
(Dexatrim, Accutrim) 
Over-the-counter nasal sprays 
(Vicks inhaler, Afrin) 
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, dextroamphetamine, methphenidate, Ritalin,pemoline, Cylert, selegiline, Deprenyl, Eldepryl, Famprofazone) 
Kidney infection 
kidney disease 
Liver disease 
diabetes 
Opiates - Substances or Conditions which can cause false positives 
Poppy Seeds 
Tylenol with codeine 
Most prescription pain medications 
Cough suppressants with Dextromethorphan (DXM) 
Nyquil 
Kidney infection, Kidney Disease 
Diabetes, Liver Disease 
Ecstacy - Substances or Conditions which can cause false positives 
Ephedrine, pseudoephedrine, propylephedrine, phenylephrine, or desoxyephedrine 
(Nyquil, Contact, Sudafed, Allerest, Tavist-D, Dimetapp, etc) 
Phenegan-D, Robitussin Cold and Flu, Vicks Nyquil 
Over-the-counter diet aids with phenylpropanolamine 
(Dexatrim, Accutrim) 
Over-the-counter nasal sprays 
(Vicks inhaler, Afrin) 
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, dextroamphetamine, methphenidate, Ritalin, pemoline, Cylert, selegiline, Deprenyl, Eldepryl, Famprofazone) 
Kidney infection 
kidney disease 
Liver disease 
diabetes 
Cocaine - Substances or Conditions which can cause false positives 
Kidney infection (kidney disease) 
Liver infection (liver disease) 
Diabetes 
Amoxicillin, tonic water 
 
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