A urine drug test requires that one provide a sample of urine. Either a dip test card is used on site for immediate results or the sample is sent away to a lab to undergo analysis. The majority of tests administered in pre-hire and random testing are the "at home" dip variety. Most "commercial" dip variety type tests have higher thresholds for a positive than do the standard dip tests. If a positive result (drug presence indicated) is found, the sample is usually sent to a lab for confirmation. This is largely due to the costliness of laboratory testing and time it takes to process and receive results.



