• Nina C Andersen-Ranberg, Lone M Poulsen, Anders Perner, Jørn Wetterslev, Stine Estrup, Theis Lange, Bjørn H Ebdrup, Johanna Hästbacka, Matthew P G Morgan, Giuseppe Citerio, Lara Zafrani, Jesús Caballero, Marie Oxenbøll-Collet, Sven-Olaf Weber, Anne S Andreasen, Morten Bestle, Helle B S Pedersen, Thomas Hildebrandt, Carsten Thee, Troels B Jensen, Nilanjan Dey, Louise G Nielsen, and Ole Mathiesen.
• Department of Anaesthesiology and Intensive Care Medicine, Zealand University Hospital, Koege, Denmark.
• Acta Anaesthesiol Scand. 2019 Nov 1; 63 (10): 1426-1433.

BackgroundDelirium among patients in the intensive care unit (ICU) is a common condition associated with increased morbidity and mortality. Haloperidol is the most frequently used pharmacologic intervention, but its use is not supported by firm evidence. Therefore, we are conducting Agents Intervening against Delirium in the Intensive Care Unit (AID-ICU) trial to assess the benefits and harms of haloperidol for the treatment of ICU-acquired delirium.MethodsAID-ICU is an investigator-initiated, pragmatic, international, randomised, blinded, parallel-group, trial allocating adult ICU patients with manifest delirium 1:1 to haloperidol or placebo. Trial participants will receive intravenous 2.5 mg haloperidol three times daily or matching placebo (isotonic saline 0.9%) if they are delirious. If needed, a maximum of 20 mg/daily haloperidol/placebo is given. An escape protocol, not including haloperidol, is part of the trial protocol. The primary outcome is days alive out of the hospital within 90 days post-randomisation. Secondary outcomes are number of days without delirium or coma, serious adverse reactions to haloperidol, usage of escape medication, number of days alive without mechanical ventilation; mortality, health-related quality-of-life and cognitive function at 1-year follow-up. A sample size of 1000 patients is required to detect a 7-day improvement or worsening of the mean days alive out of the hospital, type 1 error risk of 5% and power 90%.PerspectiveThe AID-ICU trial is based on gold standard methodology applied to a large sample of clinically representative patients and will provide pivotal high-quality data on the benefits and harms of haloperidol for the treatment ICU-acquired delirium.© 2019 Acta Anaesthesiologica Scandinavica Foundation. Published by John Wiley & Sons Ltd.

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