The aim of this guideline is to assist health care professionals in all healthcare settings, (pre-hospital emergency care, primary care and secondary care including Emergency Department/ Acute Medical Unit and specialist services including maternity, mental health, disability and specialised orthopaedic centres) in assessing and making decisions on the management of acute asthma in adults and to assist policy makers and those planning acute services for adult asthma patients. The National Clinical Programmes including the National Clinical Programme for Asthma (NPCA) were set up through the HSE’s Clinical Strategy and Programmes Division with the aim of delivering better care and outcomes through the best use of resources, delivered through standardised care pathways and models of care for the patient journey throughout the national health system. The Programmes are focused on transforming the way care is delivered in Ireland, with the overarching aim of improving the quality and safety of patient care. The National Clinical Programmes have a direct impact on the patient experience and are improving care in a number of ways through defining the patient journey and this includes the development and dissemination of clinical evidenced-based guidelines to standardise and improve treatment.The development and dissemination of this Guideline on the Management of an Acute Asthma Attack in Adults is in line with this policy. This guideline provides recommendations based on current evidence for best practice in the management of an asthma attack in adults including pregnant women. Management of acute asthma attacks What is best practice management of patients with an acute asthma attack in primary care? Patients with asthma including all patients with severe asthma should have an agreed written asthma management plan, with regular checks of inhaler technique and medication compliance at every clinical assessment with the healthcare system. Patients should know when and how to increase their medication and when to seek medical assistance.