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Inconistent Results In Test For Cocainei

Updated November 15, 2012
John Says:
Wed, November 14, 2012

I have a client who teste positive for cocaine in a urine test. Two hours later she tested negative. In the second test it said the creatnine level was low. I had her take a hair follicle test 71 days after the oringinal urine test which indicated no cocaine for the period of time which I believe was 90 days. Why would there be those inconsistencies?

1 Reply

1
Verwon Says:
Thu, November 15, 2012

You should check with her about what else she was taking.

There are some antibiotics that can sometimes cause these oddities in some people. For example, the sulfa based on that's commonly prescribed under the brand name Bactrim, which contains Sulfamethoxazole and Trimethoprim is a known culprit for throwing off such tests and giving strange results.

Learn more Bactrim details here.

If she'd taken it or a similar medication within a few weeks of the test, it may have caused it.

Did she report being on any medications?

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