Employers have a legal duty to protect employees’ health, safety and welfare. Understanding the signs of drug and alcohol misuse (or abuse) will help you manage health and safety risk in your workplace. The Health and Safety Executive website has step-by-step guidance to help you manage drug and alcohol misuse at work. This includes advice on how to develop a drugs and alcohol policy and what you can do to support your employees

See: Managing drug and alcohol misuse at work – Overview – HSE