What are cut-off levels and does TestExpress meet them?
Over the years the speed and specificity of immunoassays have made them one of the most accepted methods for screening for drugs of abuse in urine. The TestExpress ‘Rapid Drug Screen’ on site drug testing kits utilize the principle of highly specific reactions between antibodies and antigens for the detection of urinary drugs of abuse. These tests are a rapid, visual, competitive immunoassay for the simultaneous detection of cocaine, opiates, amphetamines, marijuana, barbiturates, benzodiazepines, methamphetamine and PCP in urine. They have been shown to have sensitivity equal to the cut-offs recommended by Substance Abuse Mental Health Services Administration (SAMHSA). Cut-offs refer to the lowest level of drug in the subject’s system that the tests can detect.
