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I,was employed ,I,work with various,fruits&vegetables,that…

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I,was employed ,I,work with various,fruits&vegetables,that...
I,was employed ,I,work with various,fruits&vegetables,that come from chilie,mexico,argeentina,and so on.I was,bitten on nose,which caused swelling,andredness.My,question is,Depending on what,because of unknown species bit me,a urine test for work given,a week later,I recieve A positive on test,for amphetimie&methamphetimine (why)?
Submitted: 8 years ago.Category: Medical
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Answered in 2 minutes by:
6/23/2010
Doctor: Dr. D. Love, Doctor replied 8 years ago
Dr. D. Love
Dr. D. Love, Doctor
Category: Medical
Satisfied Customers: 19,827
Experience: Family Physician for 10 years; Hospital Medical Director for 10 years.
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Did you take any over the counter medicines for the insect bite?

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Customer reply replied 8 years ago
benadryldye free allergy,2softgels-all i,see to read is,diphenhrdramineHCI approx.2 hrs after bitten,also applied ice bag as swelling to lips&cheeks had gotten worse and moving to left lip area,returned to work after iwas told to go home and take benadryl,thats when i was taken to hospital .
Doctor: Dr. D. Love, Doctor replied 8 years ago

The most common reason for a false positive for amphetamines are decongestant medicines. The decongestant medicines are structurally very similar to amphetamines, which why it can cross-react with the test for amphetamines. Similarly, medicines used for weight loss or stimulants, such as used for ADHD can cause a false positive. There also is an herbal supplement that has a similar chemical structure, called Ephedra or Ma Huang. Plain Benadryl has not been reported to cause a false positive for amphetamines, but there are some Benadryl products that contain decongestants that could be a problem. Plain Benadryl has been reported to cause a false positive for PCP. Other medicines that have been reported to cause a false positive less frequently include bupropion, chlorpromazine, fluoxetine, or ranitidine. Certain medical conditions can also affect drug screens, including diabetes, liver disease, or urine infections. The appropriate next step is to ask that a more accurate test be performed, referred to as GC/MS (gas chromatography/mass spectrometry), which will identify it as a false positive.

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