False Positive For Propoxyphene
UpdatedI'm in pain management. I recently took a pre employment drug test. It came back for Propoxyphene. I take Hydrocodone. I was also stung by yellow jackets 2 days before the test and was given a shot of benadryl at the hospital. I do not take propoxyphene. But it showed up on a 10 panel split test from Medtox. Can anyone tell me why?
1 Reply
From an outside perspective I can see why Hydrocodone may have been the cause for the false-positive. Reason being is that Propoxyphene is an analgesic in the opioid category; as is Hydrocodone. Unfortunately, the standard tests typically used for screenings lack the sensitivity to distinguish beyond the basic structures of the drug class vs. the drug name. This is where the issue lies.
When it comes to Benadryl (Diphenhydramine); this particular drug is known to cause false positives for benzodiazepines, PCP, & tricyclic antidepressants; so I can easily count this one out of the equation.
I hope this info helps! Is there anyway you can see about getting re-tested?
More Discussions:
I have been testing positive for benzos and i cant figure out why. I have been taking suboxone & Ondansetron & p...
282 REPLIESI took a urine drug test for my job and they said it came back positive for methamphetamine, but I dont use methamphetam...
262 REPLIESI had a surprise drug screening done by my probation officer. I had done little bit of cocaine, and tested positive for ...
43 REPLIESDoes anyone have a list of the medications that can cause false positives? I take quite a few meds and my probation offi...
34 REPLIESI go to pain mgt and tested positive for fentanyl. I had never even heard of this before I was questioned. I take 7.5 hy...
31 REPLIESI am in rehab at the moment and have tested 3 times for benzos but im only on Seroquel, Lyrica and Methadone. I have hea...
25 REPLIESI take hydrocodone 500 Mg x3 a day, gabapentin 300mg, bid; carb /levo25-100mg at bedtime for restless leg; Synthroid 0.1...
21 REPLIESI was tested a couple weeks ago by swab and it came back as having methadone in my system. I had been taking nightquil f...
16 REPLIESI am prescribed 30mg adderall twice daily and just had to take court ordered hair test and urine test. On the urine test...
15 REPLIESI am worried sick... I have been going to a suboxone doc for over a year and half now. Been very proud of myself for sta...
14 REPLIES