Drug screening is done when applying for employment in railways, airlines industries, federal transportation, and other work places where public safety is of high importance. In addition, sports drug screening is required at college level and in case of professional athletes, to screen for illegal, recreational, or performance boosting drugs such as recombinant human growth hormone, diuretics, erthropietin, anabolic steroids, and others.
Urine sample is the most popular sample used for testing due to its low cost and result reliability. Drug screening tests are a two step process, which involves the initial and confirmatory test. In the initial test, the immunoassay toxicity testing method is used, whereas in confirmatory test, the Gas Chromatography-Mass Spectrometry [GC-MS] testing is used to test for drugs. The confirmatory test is conducted to determine the presence of individual drug substances or metabolites and to quantify the amount of substance. Moreover, there are various factors that affect the time duration for which a drug remains detectable in urine or a biological sample.
North America dominates the global market for drug screening due to increase in the number of drug and alcohol abuse cases and enactment of stringent laws in the region. Asia is expected to exhibit a high growth rate in the next five years in the global drug screening market, with China and India being the fastest-growing markets in Asia Pacific. The key driving forces for the drug screening market in developing countries are the large pool of patients, growing number of drug addicts, development of advanced drug and alcohol screening devices, rising awareness regarding the significance of alcohol and drug screening, and rise in disposable income levels in the region.