Got a Medical Question? Ask a Doctor Online!
Hello, this is Dr. David. I am reviewing your question now and will be with you momentarily.
ranitidine zantac stomach acid medications, over the counter cold medications, non steroid nasal inhalers like Afrin, and vicks vapor inhaler can cause false positive for amphetamines.
I included an article about prescribed and over the counter medications which can cause false positive results.
with any screening positive test, you still need a MS/GC confirmatory test
if you are not using any amphetamines, then your confirmatory test will not be positive .
let me know if you have questions.