The amount of time your drug screening takes depends on the type of screening you’re performing. A Non-DOT screening will generally have results available within 48 hours.
DOT screenings can take up to 72. DOT samples go through a verification process to indicate it has not been tampered with in any way. After that, the sample must be sent off for laboratory testing and will be split in two at the lab so that if one tests positive, the other can be used to verify to prevent a false positive situation from occurring. After that, the second sample gets sent off for further analysis, and then the results go to a Medical Review Officer who analyzes the findings of the test.
