The Health Service Executive, responsible for operating the Irish health service, has introduced health technology management (HTM) initiatives to manage expenditure on medicines. One such approach is managed access protocols (MAPs) to support access to high-cost medicines, while providing oversight, governance and budgetary certainty to the payer. Herein we describe the development and operation of MAPs, using case studies of liraglutide (Saxenda®), dupilumab (Dupixent®) and calcitonin gene-related peptide monoclonal antibodies. A MAP imposes the eligibility criteria attached to reimbursement support of a medicine. Criteria applied include controls on prescribing authority, clinical diagnostic and severity criteria, previous lines of treatment, concomitant treatments, outcome data collection, and validations within the reimbursement claims system. The choice of criteria are specific to each medicine, dictated by the areas of uncertainty highlighted in the health technology assessment report, such as the place in treatment, population, duration of treatment, etc., the commercial arrangements reached with the marketing authorisation holder, and specific recommendations made by the decision maker. By December 2023, there were28 medicines reimbursed subject to a MAP in Ireland. Across the three case studies outlined, over 3000 patients were accessing novel treatments for chronic illnesses in September 2023. Managed access protocols can provide some cost certainty for the payer by aligning utilisation and expenditure with committed funds, while enabling access where unmet need is highest. Managed access protocols are now established in the drug reimbursement process in Ireland, meeting the needs of both payers, patients and industry, and are likely to remain a feature of the reimbursement landscape.