Random testing

Random testing refers to drug testing employees to see if they test positive for drug or alcohol use. These are performed at random intervals so that the staff members can never be sure when they will be tested. The purpose is to ensure that your workplace is drug-free.
Not all employers can implement random testing in the workplace. It must be mentioned in your policy so that you have the right to do this on your staff. These are usually conducted when there is reason to think or evidence that an employee may be using drugs, such as changes in behavior.