What Would Cause A False Positive For Phenobarbitol In Point Of Care Ua

2 YEARS I TESTED POSITIVE FOR PHENOBARBITOL IN A POINT OF CARE IN-OFFICE URINALYSIS. I HAVE NEVER TAKEN PHENOBARBITOL--I KNOW THAT IT IS DANGEROUS AND RARELY PRESCRIBED. AS I HAD REQUESTED ALONGWITH MY PRIMARY CARE PHYSICIAN THE WRITTEN AND OFFICIAL PRINT OUT OF THE POINT-OF-CARE UA. WHEN I ASKED FOR CONFIRMATION WITH A GC/MS (AS DID MY PRIMARY CARE PHYSICIAN) WHICH I KNOW TO BE INFALLIBLE, THE PHYSICIAN DID NOT CONFIRM TEST WITH A GC/MS WHICH I ASKED HIM TO DO. (hE SAID HE HAD, BUT COULD NOT PRODUCE THE REPORT OR THE NAME OF THE LAB THAT DID THE TEST. NOR WAS I CHARGED FOR A SEPARATE LAB TEST WHICH HAD BEEN THE CASE IN THE PAST BEFORE THIS PHYSICIAN STARTED TO DO THE POINT OF CARE UAS. I HAVE BEEN A HEALTHCARE PROFESSIONAL FOR OVER 35 YEARS AND KNOW THAT POINT OF CARE URINALYSIS ARE PRONE TO FALSE POSITIVES, CONTAMINATION, HUMAN ERROR, STORAGE FACILITIES, ETC.AND THAT THEY ONLY IDENTIFY CLASSIFICATIONS OF DRUGS--NOT THE SPECIFIC DRUGS WHICH A GC/MS WOULD IDENTIFY, THEREBY RULING OUT FALSE POSITIVES. . HENCE, WHEN THE PHYSICIAN FAILED TO GIVE ME A HARD COPY OF THE ALLEGED GC/MS HE DID NOR DID HE PROVIDE ME OR MY PRIMARY CARE PHYSICIAN WITH THE NAME, ADDRESS OR PHONE NUMBER OF THE LABORATORY THAT SUPPOSEDLY VERIFIED THAT INDEED THE DRUG DETECTED WAS PHENOBARBITOL (WHICH I KNOW CANNNOT BE TRUE), RED FLAGS WENT UP ALL OVER THE PLACE.. I SPENT MANY HOURS RESEARCHING POSSIBLE CAUSES OF POSSIBLE MEDICATIONS THAT MAY CAUSE A FALSE POSITIVE FOR PHENOBARBITOL. ONLINE, THERE WERE AN ABUNDANCE OF ARTICLES CONFIRMING THAT FLONASE AND OVER-THE-COUNTER ANTIHISTAMINES WERRE MOST LIKELY THE CULPRITS (AND I WAS TAKING FLONASE AT THE TME OF THE TEST). THIS INFOMRATION WAS CONFIRMED BY PHARMACISTS THAT I INTERVIEWED AS WELL AS BY SEVERAL PHYSICIANS WITH WHOM I CONSULTED. UNFORTUNATELY, AT THE TIME, I DID NOT PRINT OUT ANY OF THE ON-LINE ARTICLES SUBSTANTIATING THE FLONASE THEORY. NOW, WHEN I NEED A HARD COPY TO PROVE MY CASE, I CAN'T FIND ANY SUCH ARTICLES TO BACK ME UP. WHY THE CHANGE IN 2 YEARS? RESEARCHED THE POSSSIBLE CAUSES FOR THE FALSE POSITIVE, AND SEVERAL ARTICLES ON-LINE LISTED FLONSE AND OVER-THE -COUNTER ANTIHISTAMINES AS THE POSSIBLE CULPRITS. tHE INFORMATIONO IN THESE ARTICLES WAS CONFIRMED BY MY PRIMARY CARE PHYSICIAN AS WELL A BY TWO PHARMACISTS WITH WHOM I FDISCUSSED THE MATTER. UNFORTUNATELY, AT THE TIME, I FAILED TO PRINT OUT THE ARTICLES REGARDING FLONASE. NOW, WHEN I DESPERATELY NEED VERIFICATION THAT THIS RESULT HAD TO BE A FALSE POSITIVE, I CAN NO LONGER FIND ANY OF THE ARTICLES ON-LINE SAYING THAT FLONASE AND POSSIBLE OVER-THE COUNTER ANTIHISTMAINES COULD BE THE CULPRITS (I WAS TAKING FLONUASE FOR BRONCHITIS AND NASAL CONGESTION AT THE TIME OF THE TEST. WHY THE CHANGE IN THEORY? MY PRIMARY CARE PHYSICIAN WAS SURPRISED BY THE LACK OF SUCH ARTICLES AS WELL AND STILL MAINTAINS THAT FLONASE WAS KNOWN TO POSSIBLY PRODUCE A FALSE POSITIVE FOR PHENOBARBITOL AT ONE TIME. ARE THE TESTS DIFFERENT NOW. WHY THE CHANGE? HELP1

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