"To determine the efficacy of program of prevention of delirium in critically ill patients from the intensive care units of Bucaramanga and Floridablanca. Methods: The study will be a randomized controlled clinical trial in 600 critically ill patients recruited at 24 hours from arrival on the intensive care units of Bucaramanga and Floridablanca, without delirium, with ≥50% in the PREDELIRIC scale score, who comply with the inclusion and exclusion. The patients will be randomized in blocks to one of the two groups, intervention group (delirium prevention program, n=200) with control group (usual care; n= 400), the study will compare the incidence of delirium in both groups. Patients will be followed every day with Confusion Assessment Method for the Intensive Care Unit (CAM-ICU) until the patient presents delirium, exit to hospitalization or death. Delirium prevention program includes individualized nonpharmacological interventions such as multisensory stimulation, cognitive stimulation, activate the functional and family involvement. The study has received ethical approval from the University of Santander"