Absolutely. I think the Canada occupational health and safety regulations are built on the balance of the employer's responsibilities and the employee's rights. I don't know who made the recommendation about reporting prescriptions to an employer.
To start with, people can be impaired from various different substances and circumstances. Fatigue can create impairment. In the workplace, employers and employees work together to identify the hazards in the workplace. The regulations are built so we can have the flexibility to understand the differences in the types of workplaces, the different types of work, and the different types of workplaces. The measures put in place in any workplace are built around employers and employees working together.
With respect to any sort of questions with regard to testing, etc., in the workplace, as has been mentioned there is jurisprudence that speaks to this and measures that must be in place in order to undertake any sort of testing. There is always a balance between preserving an individual's human rights and privacy, and ensuring safety in the workplace.