A 5 panel drug testing is a basic test used to check your body for 5 different kinds of drugs. If you have any of these in your system at the time of testing, the positive result will show up in any and all of the 5 panels being tested-for.
These kinds of tests are used in many, many places so that employers can know if any of their employees are using illicit drugs while on (or off) the job. These tests can be done with advance notice, or without notice to ensure that they are getting clear, honest results each time.
There are several options available to take this test based on your preference or the method instructed for Workplace Drug Testing.