ENDORSE (Epidemiologic International Day for the Evaluation of Patients at Risk for Venous Thromboembolism in the Acute Hospital Care Setting), is a multinational, cross-sectional survey of venous thromboembolism (VTE) risk prevalence and effective prophylaxis in the acute hospital care setting. Three Irish hospitals enrolled in the study. The American College of Chest Physicians (ACCP) guidelines were employed to evaluate VTE risk and prophylaxis. Of 552 patients, 297 (53.8%) and 255 (46.2%) were categorised as surgical or medical, respectively, with 175 (59%) surgical and 109 (43%) medical patients deemed to be at risk for VTE. Of these, only 112 (64%) and 51 (47%) received recommended VTE prophylaxis, respectively. The results are consistent with those observed in other countries and demonstrate a high prevalence of risk for VTE and a low rate of prophylaxis use, particularly in medical patients. Awareness of VTE guidelines should be an integral component of health policy.