Drug testing is different from the drug screening test. A drug screening test is a rapid diagnostic test, which gives qualitative results regarding the presence or absence of the drug. These tests can even detect nicotine, alcohol, caffeine and many more commonly used drugs. There is no need to fast or to follow any special dietary restrictions before going for any drug screening test. Immunoassay and chromatography Immunoassays are used world wide for the rapid screening of drugs and recommended as useful tool for screening. Immunoassays works on the principle of antigen-antibody interaction and Chromatography is based on subjective judgment of a technician.
The analysis of confirmation with conclusive methods (GC-MS or chromatography) is inevitable for the valid identification of substance, the detection of the congeners, and the precise determination of the concentrations in the body liquids. Though these are highly valuable tools for testing illicit drugs, there is a real risk of false-positive and false-negative findings when tests are used by non-professionals.
Sensitivity Sensitivity in drug testing means the probability of a positive test result for a drug abuse suspect. Sensitivity test tracks the efficacy of drug treatments based on the impact on functioning of different body organs. It can be used as a tool to help in determining whether a treatment with a particular drug should be continued, modified or stopped. It also checks for any subtle changes in the vision, which is resulted from any therapy.
Specificity Probability of a negative result in the drug test for any suspect who does not abuse drugs is referred as specificity. Each testing method has sensitivity, specificity, reproducibility and reliability of results for regulatory or approval results. The accuracy of drug testing reflects both chemical factors, which influences test results such as sensitivity and specificity and as well as pharmacological considerations like drug dose, times of drug use etc.
For measuring the level of drugs in the body the immunoassay and chromatography can be adapted. Screening assays are less expensive and less labor intensive than sensitivity and specificity. The above information helps the individuals who want to go for the simple and easy process of drug screening test.
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