People can be disqualified from certain jobs for having steroids in their system. Steroid tests are not commonly used, however, by employers outside the field of athletics.
Employers mostly screen for illegal drugs, alcohol and prescription drugs with the potential for abuse. State law dictates which types of drug tests are permitted. Urine tests are the most common type, although testing is also possible through blood, hair and saliva.
Employers screen for drugs to maintain a safe environment for employees and the public. Drug testing is also done in an effort to keep employer costs down by avoiding worker injury, sick time and errors at work.