What can cause a positive meth test

    • [PDF File]Methamphetamine Abuse

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      method in newborns; a positive result indicates maternal use in the second half of pregnancy. 38 Pseudoephedrine can cause a positive test result for amphetamines, but a


    • [PDF File]Methamphetamine Contamination on Environmental Surfaces ...

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      test positive for methamphetamine in urine samples. In many of these cases, the parents have indicated that they have never manufactured methamphetamine in the residence. We were asked if it was possible for children to be exposed to methamphetamine without the presence of a working laboratory in the residence. We were also asked to determine


    • [PDF File]Hair Follicle Testing Questions and Answers

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      Enzyme-immunoassay antibodies (EIA), similar to those used to test urine, are used for the initial screening test for drugs of abuse in hair; therefore the potential for substances such as over-the-counter medications to cause a false positive screening result does exist. To


    • [PDF File]Urine drug screening

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      most SSRIs, bupropion, chlorpheniramine, and H2 blockers. Drugs that induce CYO450 and cause rapid metabolism and a shorter opioid detection level include rifampin and dexamethasone. False Positives: The basic screening urine drug test can be susceptible to false positives. The detection level for opiates


    • [PDF File]MAKING SENSE OF METH TESTING

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      The sensitivities of meth test kits can vary wildly. Where one might show no meth present, another can identify significant levels of meth. You must be clear on the capabilities of the testing service you use, before you commit to buying that service. As a rule of thumb, lab based testing will always be more sensitive than an infield/self ...


    • [PDF File]Causes for Urinalysis Discrepancies - Dynacare

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      table below lists some circumstances when false-positive and false-negative results may occur. In all cases, results must be correlated with patient history and other clinical information. Causes of False-Positive and False-Negative Routine Urinalysis Results Dipstick test False positive False negative Glucose Alkaline urine (pH>9), s trong


    • [PDF File]Introduction

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      ranitidine can produce a false positive result for amphetamines. It is also worth noting that some foodstuffs can also produce positive results such as poppy seeds for opioids. A false negative result is possible when the screening test is negative but the confirmatory test is positive. This is less common as negative screening tests


    • [PDF File]Ordering and Interpreting Urine Drug Tests

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      hydrolyzed. Can pick up with a specific test such as a specific qualitative EIA kit such as MSOPIATE. (Ask your lab!) • Illnesses that cause lactic acidosis can cause false negatives • Insensitivity of benzodiazepine screen: only 40% for lorazepam; clonazepam (Klonopin) …


    • [PDF File]CRYSTAL METH AND OTHER AMPHETAMINES

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      initiated, can rapidly lead to dependence, resulting in serious health and social consequences. The number of deaths related to methamphetamine use is increasing, although the total rate of deaths due to illicit drug overdose is decreasing. Methamphetamine is also called crystal meth, meth, jib, speed, crank, crystal, teck, zip,


    • [PDF File]THE SCIENTIFIC ISSUE: HOW ACCURATE ARE POSITIVE SWEAT ...

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      closely at both the positive sweat patches and the negative urine tests. Even if one adjusts the study’s test results conservatively, to (1) take into account GC/MS analysis of the positive sweat patches, and (2) eliminate some of the possibly drug-free individuals by lowering the cutoff level for a urine test to be considered negative, this


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