It is important for employers to include a Prescription Medication Disclosure provision in their workplace policy that is limited to those medications with impairing effects. For example, dura Automotive Systems implemented a new drug testing policy prohibiting employees from “being impaired by or under the influence” of alcohol, illegal drugs or legal drugs.” If an employee tested positive for any of the substances included on the company’s panel, a Medical Review Officer questioned him or her. The results were changed to negative if the employee had a valid prescription, but the employee was further instructed to provide the medication’s instructions to a supervisor. If warnings advised against the operation of machinery, he or she must discontinue use or be terminated. While a drug-free workplace won’t always guarantee there will be no drug use or abuse, a policy such as this is an excellent investment.