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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes False Positive For Morphine In A Drug Test?

I just took a drug test, and it tested positive for morphine, and I have not touched morphine! I read online that my allergy medicine, Loratidine, can cause a false positive for morphine. Is this true? I swear I didn t take an morphine@?! But, I had just taken ny my Loratidine, which I am prescribed to, a couple of hours before. Please help, it s important!
Fri, 12 May 2017
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General & Family Physician 's  Response
Hello,
Thank you for the query at HealthcareMagic

Antihistamines in general can cause false positivity to methadone (which is an Opioid like morphine)
Positive test results to morphine can occur if you have eaten poppy seeds within 2 days of testing.

Hope this answers your questions
Please address further questions here
Regards
Dr.Lekshmi
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What Causes False Positive For Morphine In A Drug Test?

Hello, Thank you for the query at HealthcareMagic Antihistamines in general can cause false positivity to methadone (which is an Opioid like morphine) Positive test results to morphine can occur if you have eaten poppy seeds within 2 days of testing. Hope this answers your questions Please address further questions here Regards Dr.Lekshmi