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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.
The reaction is used in spot tests and is also known as Chen-Kao test (or simply as Chen, Test T in UN Precursor Test Kit). The test is often used to distinguish ephedrine, pseudoephedrine, norephedrine, cathinone and methcathinone from amphetamine and methamphetamine, which do not react with Chen’s test reagent. [4]
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.
Drugs in the class of amphetamines, or substituted amphetamines, are known to induce "amphetamine psychosis" typically when chronically abused or used in high doses. [8] In an Australian study of 309 active methamphetamine users, 18% had experienced a clinical level psychosis in the past year. [9]
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.
Amphetamine type stimulants can be used in the treatment of narcolepsy, a rare neurological disorder where the brain is unable to regulate the sleep-wake mechanism. [17] Amphetamines causes an increase in dopamine release, which is the proposed mechanism for its wake-promoting effect. [18]
False positive COVID-19 tests—when your result is positive, but you aren’t actually infected with the SARS-CoV-2 virus—are a real, if unlikely, possibility, especially if you don’t perform ...