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A. Schuyler, NP
A. Schuyler, NP, Nurse Practitioner
Category: Health
Satisfied Customers: 16291
Experience:  Board Certified NP, MS, RN. 25 years private practice & hospitalist
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What can cause a false positive? I 't take any meds.

Customer Question

What can cause a false positive for amphetamines? I don't take any meds.
Submitted: 1 year ago.
Category: Health
Expert:  A. Schuyler, NP replied 1 year ago.


What kind of drug test was it? A dipstick-type test can have false positives, but when the urine is sent to a laboratory for GC/MS testing, there are no false positives or false negatives. Each chemical has its own "footprint" so there is no confusion.

Looking forward to hearing from you.



Customer: replied 1 year ago.
ok, I haven't taken any amphetamines and tested positive.
Customer: replied 1 year ago.
No cold meds or anything.
Expert:  A. Schuyler, NP replied 1 year ago.

If it was a dipstick-type test, then some antihistamines, cold medicines, nasal inhalers, and some prescription drugs for depression (tricyclics, bupropion, quetiapine) can cause false positives. However, when urine is sent for testing at the laboratory via gas chromatography/mass spectrophotometry there are no false positives. If it was tested in a laboratory, then someone must have slipped you amphetamine in some form.

Best regards,