All workplaces must comply with the Health and Safety in Employment Act. This requires employers to take all practicable steps to identify and manage hazards in their workplaces.
Effective drug-free programmes are workplace specific and will vary according to the requirements of a particular business. However, they will involve either a detection or testing component. Detection is primarily the use of dogs and is cost efficient, non-invasive and requires no participation on behalf of the employee. Drug testing is expensive, confrontational and targets a small portion of your staff.
Thus an ideal drug-free program involves the use of a drug detection dog to identify staff that have recently come into contact with illicit drugs followed by a confirmatory drug test.