Adverse drug events in a sentinel hospital in the State of Goiás, Brazil.

This was a retrospective, descriptive and documental study with the aim of identifying adverse drug events which occurred in the medication administration process and to classify these medication errors. This study was developed in the internal medicine unit of a general hospital of Goiás, Brazil. Report books used by nursing staff from the period 2002 to 2007, were analyzed. A total of 230 medication errors were identified, most of which occurred in the preparation and administration of the medications (64.3%). Medication errors were of omission (50.9%), of dose (16.5%), of schedule (13.5%) and of administration technique (12.2%) and were more frequent with antineoplastic and immunomodulating agents (24.3%) and anti-infective agents (20.9%). It was found that 37.4% of drugs were high alert medications. Considering the medication errors detected it is important to promote a culture of safety in the hospital.