What medications might give a false positive on a drug test
Medications that might give a false positive: Dronabinol (Marinol), Ibuprofen; (Advil, Nuprin, Motrin, Excedrin IB, etc), MORE? [ Source: http://www.chacha.com/question/what-medications-might-give-a-false-positive-on-a-drug-test ]
More Answers to "What medications might give a false positive on a drug test"
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- If you show them your records, then there is a reason for those drugs being in your system (if the work was done fairly recently), and there shouldn't be a problem. And it wouldn't be "falsely" positive - it would be truly positiv...
Related Questions Answered on Y!Answers
- What legal medications cause a false positive for opiates during drug testing?
- Q: I work at a lab that is certified to do drug testing. Occasionally we do what we call rapidtox test (on-site) where I just put simple drops of urine onto the test and wait to read results in a few minutes (just like a pregnancy test). Twice in the past week I've had two different patients come out positive for opiates. When they come out positive we send the urine to our main lab for further testing and confirmation. But it got me wondering what legal medications might cause false positives for opiates? How accurate are these types of drug tests any ways?I just want to add that I do the rapidtox test immediately...right when I get the urine from the patient. So I would think there is less chance of contamination. We also use tests that are packaged and not expired.
- A: Ok so I spent 5 years (while in graduate school) on the other side of this process. Meaning, that I was one of the people at LabCorp who did those urine drug screens that were sent out.Basically, the type of test that your Redox ( "in house style") test is similar to a method known as TLC (Thin Layer Chromatography). You are performing a qualitative non-specific test. This type test is very subject to interferences, just due to the simplicity of it. All compounds are made up of elements which has a specific AMU (atomic mass weight). In the cases of analyzing compounds, and especially just by groups (opiates, benzos, etc.) leaves a lat of room for polyatomic interferences, meaning that some compounds can come to gether and equal the amu of another drug compound. It is because of this high subjectivity to interferences, that it is protocol to confirm by sending out to a lab where it will be run via GC (Gas Chromatography) or GC-MS (Gas Chromatography-Mass Spectrometry). This are very sensitive instruments that can monitor for multiple analytes at a time, including interferring compounds. Also these instruments are qualitative specific (meaning they identify the exact drug compound and not just its group) as well as quantitative (tells you exactly how much of the drug compound is present in the sample).Opiates are some of the more suceptable groups for interferences. For example the drug Tramadol (Rx drug that is classed as an analgesic, but functions as a gamma opioid blocker as well as an SSRI and is used to treat pain) can very easily cause someone to show up positive on your Redox test kit, for opiates, when technically it is not an opiate, just shares some similarity in structure, especially to methadone.Then there are a lot of legal drugs that will show up on a drug test. The opiate class of drugs for example includes many legal drugs, such as hydrocodone, oxycodone, pentazocine, hydromorphone, methadone, fentanyl, etc. All of these drugs are legal, but if a patient shows up positive for opiates on your test (and they would if they were taking any of the above legal drugs) and then you sent it out for confirmation, then it would be narrowed down to which opiate drug was present, ad if this person could not produce a legal script for this medication, then it is just the same as taking an illegal drug.
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