Drug tests can be broadly grouped into two categories:
The first type of drug testing is most commonly undertaken. Under this type of testing, the person undergoing the test provides a body fluid or hair sample to the concerned person, who may be a doctor, his employer or police officer. The body fluid sample might be that of blood, urine or saliva. The person collecting the sample then puts a seal on it before sending it for laboratory evaluation. Such tests usually provide accurate results. The results are acceptable as legal evidence. Also, in this type of testing, it is possible to customize testing methods according to different demographic groups. The major limitations involved in this method are higher costs, the necessity of a place for the collection of a sample and the larger time period that is needed in testing and determining the results.
The other type of drug testing is undertaken on the site, which might be the workplace or the school. This type of testing can also be undertaken at home. In other words, a laboratory is not required for this type of drug testing. This method of testing is less expensive and the results can be determined in a short time span. In case of drug testing on the site, the situation of the person strategically avoiding testing positive can be avoided. Accurate results can be obtained by such testing. However, for the results of such testing to be legally accepted, it is necessary that they be occupied by results from laboratory testing.
There are differences of opinion prevailing among the Americans regarding the subject of employee drug testing.
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