This Practice Note outlines the legal framework in Ireland for managing intoxicants in the workplace under the Safety, Health and Welfare at Work Act 2005 (Ireland) (SHAWWA 2005 (IRL)). While SHAWWA 2005 (IRL) envisages intoxicant testing, the specific regulations to enforce testing were never introduced, meaning testing is neither legally required nor prohibited, any policy must rely on employee consent and consultation. Employers must assess intoxicants as potential hazards, ensure any workplace testing is reasonable and proportionate, and comply with data protection law. Case law highlights the need for clear policies, informed consent, fair procedures, and proper consideration of alcohol dependency as a disability.