Evaluating your urine drug tests or another type of biological sample is done to determine if the individual has been using the drug(s) or other circumstances that may require it including: Pre-employment drug screening test at random, or work-related drug testing to identify on-the-job drug use. College or professional athletic drug testing Post-accident drug testing Safety-related Your urine drug test will depend on how backed up the lab clinic is; however, your urine drug test result is usually available within a few hours or up to 3 days after your appointment. If an employer or a rehabilitation facility requested your drug test results, they will receive your urine drug test results and will offer you the results after they receive them.