Abstract
Objective: to identify and analyze the drug interactions existing in prescriptions of an Intensive Care Unit of a private care hospital in the city of Teresina-PI. Methods: This is an exploratory, descriptive, retrospective study. Data collection was performed at the Intensive Care Unit of the Hospital São Paulo, Teresina-PI, Brazil, in January and February of the 2018 year. Results: Hospital prescriptions of 86 patients were analyzed, totaling 242 prescriptions in which 676 of moderate interactions, 257 of light level and 78 of severe level were observed. Conclusion: The present study highlights the magnitude of the occurrence of the interactions, the results obtained in this investigation evidenced the need for information regarding medications commonly administered in the ICU.