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  2. Drug test - Wikipedia

    en.wikipedia.org/wiki/Drug_test

    As such, hair testing results are legally and scientifically recognized as admissible evidence. [33] Hair testing is commonly used in the USA as pre-employment drug test. The detection time for this test is roughly 3 months, which is the time, that takes head hair to grow ca. 1.5 inches, that are collected as a specimen.

  3. Onset of action - Wikipedia

    en.wikipedia.org/wiki/Onset_of_action

    Onset of action is the duration of time it takes for a drug's effects to come to prominence upon administration. With oral administration, it typically ranges anywhere from 20 minutes to over an hour, depending on the drug in question.

  4. Presumptive and confirmatory tests - Wikipedia

    en.wikipedia.org/wiki/Presumptive_and...

    Most people who take a drug test take a presumptive test, cheaper and faster than other methods of testing. However, it is less accurate and can render false results. The FDA recommends for confirmatory testing to be conducted and the placing of a warning label on the presumptive drug test: "This assay provides only a preliminary result.

  5. Trough level - Wikipedia

    en.wikipedia.org/wiki/Trough_level

    It is pharmacokinetically normal that over time, the drug molecules are being metabolized or cleared by the body, so the concentration of drug that remains available is dropping. In a medicine that is administered periodically, the trough level should be measured just before the administration of the next dose in order to avoid overdosing. [ 3 ]

  6. Cannabis drug testing - Wikipedia

    en.wikipedia.org/wiki/Cannabis_drug_testing

    Most cannabis drug tests yield a positive result when the concentration of THC-COOH in urine exceeds 50 ng/mL. [10] Urine testing is an immunoassay based test on the principle of competitive binding. Drugs which may be present in the urine specimen compete against their respective drug conjugate for binding sites on their specific antibody.

  7. Concentra - Wikipedia

    en.wikipedia.org/wiki/Concentra

    Concentra Inc., is a national health care establishment centered around occupational health. [1] It was founded in 1979 in Amarillo, Texas , [ 2 ] and the headquarters of the corporation is in Addison, Texas . [ 3 ]

  8. Methylphenidate - Wikipedia

    en.wikipedia.org/wiki/Methylphenidate

    Methylphenidate, sold under the brand names Ritalin (/ ˈ r ɪ t ə l ɪ n / RIT-ə-lin) and Concerta (/ k ə n ˈ s ɜːr t ə / kən-SUR-tə) [citation needed] among others, is a central nervous system (CNS) stimulant used medically to treat attention deficit hyperactivity disorder (ADHD) and, to a lesser extent, narcolepsy.

  9. Mecke reagent - Wikipedia

    en.wikipedia.org/wiki/Mecke_reagent

    The Mecke reagent is used as a simple spot-test to presumptively identify alkaloids as well as other compounds. It is composed of a mixture of selenous acid and concentrated sulfuric acid, [1] which is dripped onto the substance being tested.