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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]
Pseudoephedrine is widely available over-the-counter (OTC) in both single-drug and combination preparations. [30] [22] [13] [2] Availability of pseudoephedrine has been restricted starting in 2005 as it can be used to synthesize methamphetamine. [13] [2] Phenylephrine has replaced pseudoephedrine in many over-the-counter oral decongestant ...
Legal restrictions on pseudoephedrine have not reduced meth use, but they have driven people with colds or allergies toward substitutes that seem to be completely ineffective. Fake Sudafed Is ...
The substances must be specific. It is the most common drug screening technique. Using the targeted drug the test will tell you if it is positive or negative to that drug. There can be 4 results when taking the test. Those results can be a true-positive, a false-negative, a false-positive, and a true-negative. [14]
The drug test maker, Sirchie, conceded inspectors in New York uncovered some test kit instructions that were “sometimes ‘in error,’ could potentially cause false results, and required ...
New York’s prison system unfairly punished more than 2,000 prisoners after tests of suspected contraband substances falsely tested positive for drugs, according to a report released Thursday.
In recent years, tighter controls in Mexico on certain methamphetamine precursors like ephedrine and pseudoephedrine has led to a greater percentage of illicit methamphetamine from Mexican drug cartels consisting of a higher ratio of levmetamfetamine to dextromethamphetamine within batches of racemic methamphetamine.
Sudafed and other common nasal decongestants displayed at a pharmacy. House Republicans plan to launch an investigation into the U.S. Food and Drug Administration’s decision that deemed some ...