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EMIT therapeutic drug monitoring tests provide accurate information about the concentration of such drugs such as immunosuppressant drugs and some antibiotics. [ 3 ] [ 4 ] EMIT urine assays for drugs such as cannabinoids, morphine, and amphetamine are designed to detect the drug itself or a metabolite of the drug present in a concentration ...
Clobenzorex can be detected in urine, which can cause false positives for workplace drug screening. [7] It is one of many drugs that can cause false positives for amphetamine urine drug screening. [8] It may be differentiated from amphetamine use through testing for metabolites such as 4-hydroxyclobenzorex [9] or enantiomeric analysis. [7]
Mebeverine can, on highly rare occasions, cause drug-induced acute angle closure glaucoma. [ 6 ] In a urine drug-screening test, mebeverine can affect a false positive result for amphetamines.
Some drug abuse screening programs rely on hair, saliva, or sweat as specimens. Most commercial amphetamine immunoassay screening tests cross-react significantly with MDA and major metabolites of MDMA, but chromatographic techniques can easily distinguish and separately measure each of these substances.
Cross-reactivity, in a general sense, is the reactivity of an observed agent which initiates reactions outside the main reaction expected.This has implications for any kind of test or assay, including diagnostic tests in medicine, and can be a cause of false positives.
In the case of life-threatening symptoms, unconsciousness, or bizarre behavior in an emergency situation, screening for common drugs and toxins may help find the cause, called a toxicology test or tox screen to denote the broader area of possible substances beyond just self-administered drugs. These tests can also be done post-mortem during an ...
Lawyers for the 15-year-old Russian figure skater argued contamination from heart medication her grandfather was taking caused the positive test in a sample taken weeks before the Olympics opened.
The above photo shows the positive results of the number 2 Marquis reagent presumptive drug test when used with a sample of opium. It is the primary presumptive test used in Ecstasy reagent testing kits. It can also be used to test for such substances as opiates (e.g. codeine, heroin), and phenethylamines (e.g. 2C-B, mescaline).