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Substances that cause false positives [not just for amphetamines]
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
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
What else can I help you with?
If you take a blood test and it comes back positive and then 2 days later you take another blood test and it comes back negative could you still be pregnant?
False negatives are common, however, there is no false positive. It is best to get a blood test to be absolutely sure.
When had miscarriage and linen of womb swollen can it make you have a positive pregnancy test?
Yes, if the miscarriage was recent then your hormone levels are still not back to normal and it could cause a false positive result on a pregnancy test.
Could excedrin cause positive for THC in urine analysis?
Yes! Your UA test may come back positive with the use of Excedrin. Moreover, the use of Motrin, Advil, and other pain relievers may come back as false positives also.
Will Epinephrine cause a false positive for meth?
yes cause i had a epipen shot and it came back a positive
Does oxycodone make a drug screen test positive for methamphetamine?
No, taking fentanyl will not give a positive result for a drug test screening for oxycodone. It is a fallacy that all "synthetic opioids" show up as the same compound on a drug test. The fact of the matter is that fentanyl has a vastly different chemical structure than oxycodone, and thus would not give a false positive for it on a drug test. Fentanyl would also not give a positive result for hydrocodone or opiates (morphine, codeine, and heroin).
How can methamphetamine enter into the body if never used?
i took a drug test and it came back positive for methamphetamine.How can that be when i never used a drug in my life.Can some one please help
What substance could make a drug test come back positive for methamphetamine's?
Erowid.org has a list of all the substances that can throw a false positive for meth. It is a VERY long list--probably 80 different drugs including diet aids, cold pills and a lot of prescription medicines. Meth is a phenethylamine-class drug AND an amphetamine-class drug, so any drug that looks like an amphetamine, or any drug that looks like a phenethylamine (and there are a BUNCH of these, most not being any fun at all) will trigger a false positive for meth. It gets better: the first order metabolite of meth is amphetamine, so anything that will throw a false positive on an amphetamine test will also throw a false positive on a meth test. That having been said, most people don't test for meth at all--they look for amphetamine because methamphetamine (amphetamine with a methyl group attached) demethylizes in the liver quickly.
Does zolofft cause a false positive for benzo?
I just took a drug test for the company, walgreens, and much to my dismay, it came back positive for Benzos. Since then, I have been doing research to see what could possibly have caused this result. About a 2 years ago, I was inaccurately given a prescription for zoloft, and I asked both the lab, other labs, and my primary care if this could show up positive for Benzos... and while Benzos can be an anti-depressant, from what I've heard, it can't cause this false positive...
Can you have a false positive on a pregnancy test?
False positives are very rare, less than one in a hundred positive tests are false. However with the very sensitive tests nowadays it may show up positive and then you have a very early miscarriage. Even 20 years ago tests were not that sensitive and women 'miscarried' at the time of their period without ever realising they were pregnant.
Can mucinex test positive for methamphetamine?
Yes! It did for me and my mother. I tested positive for amphetamines after taking mucinex that morning. They even sent my urine to the lab and it came back for 1000 nanograms of the amphetamines. Plus back a few years ago my mothers pain mangemeny doctor told her mucinex can come back positive for meth or ecastcy. No matter what other websites say. Its very VERY possible.
What can you do when your drug test comes back positive for benzodiazapines and methadone and you know you did not use them?
You can request the lab to a confirmation test to see if there has been a false positive for your results.
i took a urine test at work, came back positive for cocaine what medication, perscription and overcountercould have caused this positive?
Certain medications like lidocaine, amphetamines, and certain antidepressants can potentially cause false positives for cocaine on urine drug tests. Over-the-counter remedies like cold medicines containing levamisole or pseudoephedrine could also lead to a false positive result. It's important to consult with a healthcare provider or pharmacist for further guidance and to discuss any medications or supplements you may be taking.
