Regardless of the type of business being run, conducting a workplace drug test can serve as an effective and valuable resource for employers. It is important, however, to keep a few factors in mind: Always test before making a hire, if an employee’s behavior or an incident dictates it, and following an accident on the job. Random testing can help keep employees honest, but it’s important in all situations to conduct the appropriate method of testing, including urine, blood or saliva.