Every registered study with an Irish site, from the first entries to the ones opening now: starts per year, who sponsors them, what they test and where they run.
3,146 studies registered on ClinicalTrials.gov list at least one site in Ireland, 367 of them open to enrolment today. 141 studies started in 2025 (76 industry-sponsored), and 67 have a 2026 start date so far. 1,140 studies (36%) run in Ireland only; the rest are multinational. Studies registered only in the EU system (CTIS) are counted separately below.
* 2026 is a part year and includes anticipated start dates still ahead. Start year as registered by the sponsor (ClinicalTrials.gov).
| Start year | Studies | Industry | Non-industry | Phase 3 | Ireland only | Start date still anticipated |
|---|---|---|---|---|---|---|
| 2026 (to date) | 67 | 26 (39%) | 41 | 14 | 33 | 20 |
| 2025 | 141 | 76 (54%) | 65 | 47 | 57 | 10 |
| 2024 | 145 | 64 (44%) | 81 | 36 | 68 | 8 |
| 2023 | 157 | 74 (47%) | 83 | 45 | 78 | 12 |
| 2022 | 135 | 66 (49%) | 69 | 37 | 57 | 5 |
| 2021 | 175 | 91 (52%) | 84 | 56 | 81 | 7 |
| 2020 | 133 | 66 (50%) | 67 | 34 | 49 | 1 |
| 2019 | 156 | 83 (53%) | 73 | 49 | 55 | 3 |
| 2018 | 141 | 85 (60%) | 56 | 51 | 53 | 6 |
| 2017 | 152 | 90 (59%) | 62 | 47 | 51 | 3 |
| 2016 | 129 | 66 (51%) | 63 | 46 | 51 | 40 |
| 2015 | 147 | 72 (49%) | 75 | 53 | 51 | 45 |
| 2014 | 114 | 52 (46%) | 62 | 28 | 50 | 51 |
| 2013 | 127 | 70 (55%) | 57 | 47 | 37 | 55 |
| 2012 | 132 | 73 (55%) | 59 | 57 | 42 | 72 |
| 2011 | 115 | 66 (57%) | 49 | 45 | 32 | 67 |
| 2010 | 113 | 63 (56%) | 50 | 39 | 39 | 84 |
"Ireland only" means the study lists no site outside Ireland. "Anticipated" start dates are the sponsor's plan rather than a confirmed first-patient date; they are common for the newest studies and for older records the sponsor never updated.
Recruiting, not yet recruiting and enrolling by invitation, by registered phase. "Not applicable" covers device, behavioural and observational studies.
| Registry status | Studies | Share |
|---|---|---|
| Completed | 1,913 | 60.8% |
| Unknown (not updated by the sponsor) | 332 | 10.6% |
| Recruiting | 320 | 10.2% |
| Active, not recruiting | 248 | 7.9% |
| Terminated | 236 | 7.5% |
| Withdrawn | 28 | 0.9% |
| Not yet recruiting | 27 | 0.9% |
| Enrolling by invitation | 20 | 0.6% |
| Suspended | 13 | 0.4% |
| Approved for marketing | 5 | 0.2% |
| No longer available | 4 | 0.1% |
The Irish trials register lists every currently open study with its sites and conditions.
Studies with Irish sites started 2022 to 2026, by lead sponsor as registered.
| Lead sponsor | Studies, all time | Started 2022 to 2026 |
|---|---|---|
| University College Cork | 112 | 42 |
| University College Dublin | 102 | 45 |
| Case Comprehensive Cancer Center | 79 | 0 |
| Gynecologic Oncology Group | 76 | 0 |
| Royal College of Surgeons, Ireland | 75 | 46 |
| Novartis Pharmaceuticals | 72 | 5 |
| Bristol-Myers Squibb | 71 | 11 |
| Cancer Trials Ireland | 70 | 10 |
| University of Dublin, Trinity College | 69 | 26 |
| Merck Sharp & Dohme LLC | 60 | 25 |
| University of Limerick | 58 | 21 |
| Hoffmann-La Roche | 58 | 0 |
| Boehringer Ingelheim | 57 | 7 |
| Radiation Therapy Oncology Group | 55 | 0 |
| AbbVie | 54 | 11 |
| Pfizer | 46 | 0 |
| Novo Nordisk A/S | 44 | 7 |
| National Cancer Institute (NCI) | 44 | 0 |
| Bayer | 42 | 0 |
| National University of Ireland, Galway, Ireland | 41 | 10 |
| Eastern Cooperative Oncology Group | 39 | 0 |
| GlaxoSmithKline | 36 | 0 |
| Children's Oncology Group | 35 | 0 |
| AstraZeneca | 31 | 9 |
| Vertex Pharmaceuticals Incorporated | 30 | 0 |
Sponsor names are as registered, so one company can appear under more than one legal entity. The sponsor pages group current trials by organisation.
Each study lists up to four conditions; counts are studies mentioning the term, all statuses.
| Condition, as registered | Studies |
|---|---|
| Breast Cancer | 105 |
| Ovarian Cancer | 53 |
| Prostate Cancer | 50 |
| Lung Cancer | 43 |
| Leukemia | 42 |
| Cystic Fibrosis | 40 |
| Lymphoma | 39 |
| Cancer | 37 |
| Diabetes Mellitus, Type 2 | 36 |
| Rheumatoid Arthritis | 34 |
| Crohn's Disease | 33 |
| Head and Neck Cancer | 32 |
| Multiple Myeloma | 31 |
| Ulcerative Colitis | 31 |
| Colorectal Cancer | 31 |
| Diabetes | 29 |
| Brain and Central Nervous System Tumors | 27 |
| Endometrial Cancer | 26 |
| Obesity | 26 |
| Coronary Artery Disease | 26 |
| Amyotrophic Lateral Sclerosis | 25 |
| Hypertension | 25 |
| Sarcoma | 25 |
| Asthma | 23 |
| Fallopian Tube Cancer | 23 |
| Primary Peritoneal Cavity Cancer | 22 |
| Breast Neoplasms | 20 |
| Stroke | 20 |
| Non-Small Cell Lung Cancer | 20 |
| Healthy | 20 |
Registered site locations in Ireland by city (one study can have several sites). On average a study lists 1.6 Irish sites.
| Site, as registered | Studies |
|---|---|
| Beaumont Hospital, Dublin | 213 |
| Cork University Hospital, Cork | 212 |
| St. Vincent's University Hospital, Dublin | 207 |
| University Hospital Galway, Galway | 179 |
| St James's Hospital, Dublin | 162 |
| Mater Misericordiae University Hospital, Dublin | 160 |
| University Hospital Limerick, Limerick | 74 |
| St James Hospital, Dublin | 70 |
| Mater Private Hospital, Dublin | 61 |
| University Hospital Waterford, Waterford | 59 |
| Tallaght University Hospital, Dublin | 48 |
| University College Dublin, Dublin | 45 |
| Waterford Regional Hospital, Waterford | 37 |
| Atlantia Food Clinical Trials, Cork | 34 |
| Bon Secours Hospital, Cork | 34 |
| University College Cork, Cork | 31 |
| Beacon Hospital, Dublin | 29 |
| Our Lady's Hospital for Sick Children Crumlin, Dublin | 28 |
| University of Limerick, Limerick | 26 |
| Mid-Western Regional Hospital, Limerick | 25 |
| Rotunda Hospital, Dublin | 24 |
| University College Hospital Galway, Galway | 23 |
| Adelaide and Meath Hospital, Dublin Incorporating the National Children's Hospital, Dublin | 23 |
| Our Lady's Children's Hospital, Dublin | 23 |
| Cork University Maternity Hospital, Cork | 22 |
| St. Vincent's Hospital, Dublin | 21 |
| National Maternity Hospital, Dublin | 18 |
| Our Lady's Hospital for Sick Children, Dublin | 17 |
| Sligo General Hospital, Sligo | 17 |
| Connolly Hospital Blanchardstown, Dublin | 16 |
Sites are as sponsors registered them: spellings of the same hospital are merged, placeholder entries such as "Research Site" are left out, and a few sites filed under Ireland by the sponsor are in Northern Ireland.
* 2026 to date. Year of the registered study completion date, studies whose status is "completed".
Completion is the sponsor's registered study completion date, which can be updated after the fact. Terminated and withdrawn studies (264 all time) are not counted here.
| Study | Sponsor | Phase | Started |
|---|---|---|---|
| Dual Antiplatelet Therapy Strategies After Acute Myocardial Infarction Undergoing PCI: Prasugrel vs Ticagrelor & 12 Months vs 1-3 Months NCT07507500 · Myocardial Infarction (MI) · Dublin |
Instituto de Investigación Sanitaria de la Fundación Jiménez Díaz Universities, hospitals and charities |
Phase 4 | 2 Sep 2026 |
| A Study of BMS-986504 Monotherapy and in Combination With Other Agents in Participants With Advanced and/or Metastatic Solid Tumors With Ho… NCT07492680 · Solid Tumors · Cork, Dublin |
Bristol-Myers Squibb Industry |
Phase 2 | 27 Jul 2026 |
| A Study to Investigate the Efficacy and Safety of SC0032, a Magnesium Salt Oral Spray, in Adults With Refractory or Unexplained Chronic Cou… NCT07690059 · Refractory Chronic Cough and Unexplained Chronic Cough |
Sensory Cloud, Inc. Industry |
Phase 2 | 13 Jul 2026 |
| Evaluation of the FARAFLEX Mapping and Pulsed Field Ablation System in Subjects With Atrial Fibrillation NCT07575269 · Paroxysmal Atrial Fibrillation (PAF), Persistent Atrial Fibrillation · Dublin |
Boston Scientific Corporation Industry |
Not applicable | 7 Jul 2026 |
| Optimising Adjuvant Chemotherapy Prescription in Young Patients With Hormone-dependent Breast Cancer Using Genomic Tests NCT07106632 · Early Breast Cancer, Premenopausal Breast Cancer · Cork, Dublin, Limerick, Tullamore, Waterford |
UNICANCER Universities, hospitals and charities |
Phase 3 | 26 Jun 2026 |
| Safety and User Experience of BP-CBB NCT07628608 · Safety and Tolerability in Healthy Volunteers · Cork |
Bactolife A/S Industry |
Not applicable | 16 Jun 2026 |
| The PARTUM Trial: Postpartum Aspirin to Reduce Thromboembolism Undue Morbidity NCT06494878 · Venous Thromboembolism, Postpartum Period · Dublin |
University of Calgary Universities, hospitals and charities |
Phase 3 | 4 Jun 2026 |
| Phase 2 Study of Disease Risk Mutation-Guided Finite Acalabrutinib+Venetoclax for Relapsed CLL Post-1L Finite cBTKi+BCL2i ± Obinutuzumab NCT07024706 · Chronic Lymphocytic Leukemia (CLL), Small Lymphocytic Lymphoma (SLL) · Dublin |
AstraZeneca Industry |
Phase 2 | 4 Jun 2026 |
| Understanding the Feasibility of a Co-designed Pre-radiotherapy Exercise Programme - A Single-arm Study NCT07554677 · Lung Cancer |
Queen's University, Belfast Universities, hospitals and charities |
Not applicable | 2 Jun 2026 |
| A Study to Compare Elritercept With Epoetin Alfa to Treat Anemia in Adults With Very Low, Low, or Intermediate Risk Myelodysplastic Syndrom… NCT07422480 · Myelodysplastic Syndrome, Anemia · Cork, Dublin, Galway |
Takeda Industry |
Phase 3 | 21 May 2026 |
Since January 2023 every EU trial of a medicine must be authorised through the EU Clinical Trials Information System, and many of those are never registered on ClinicalTrials.gov. In our CTIS feed (the 2,500 most recent decisions of 12,494 in the register, from 2 Sep 2025), 85 authorised trials include Irish sites, 76 of them decided in the last 12 months. They are listed on the EU trials register. The two registries overlap but neither contains the other, so the totals on this page cannot simply be added.
What this dashboard counts. Every ClinicalTrials.gov record with at least one location in Ireland, in every status, as returned by the registry's API. Studies registered only in CTIS or EudraCT, and studies run in Ireland without any registration, are not included. Enrolment figures, start and completion dates, phases and sponsor types are as the sponsor registered them and may be anticipated or out of date; a study's enrolment covers all its countries, not Ireland alone. This page is a count of registrations, not a measure of trial quality, patient numbers or investment.
Every count on this page is computed from registry records; nothing is estimated. Where a figure depends on how sponsors register data (start dates, sites, sponsor names), the note under the table says so.
A job downloads the full set of Irish-site studies from the ClinicalTrials.gov API every few days, keeps a compact copy and recomputes the aggregates. No AI drafting and no editorial pass. See our editorial standards. The ClinicalTrials.gov data on this page was last retrieved on 28 Sep 2026.