Medication errors could bring serious consequences to patients. Reporting medication error is a strategy to
mitigate such incidence from happening. Unfortunately, some nurses do no report the errors due to certain
factors. Determining the factors influencing unreported medication errors will ensure imperative actions
that are to be taken to curb this issue. The aim of this study is to determine the prevalence and perceived
causes of unreported medication errors among nurses in a public hospital in Selangor. A descriptive and
cross-sectional study was carried out in 26 wards from various disciplines and the sample involved 234
nurses. The data were gathered through self-reported questionnaires consisting of three sections. The first
section covered demographic characteristics, the second section aimed to obtain information on the
frequency of medication error incidents and the last section aimed to obtain information on nurses'
perceptions of barriers in reporting medication errors. The findings of this study indicated that there was a
significant relationship between level of education and the nurses' perceptions of barriers in reporting
medication errors. The study recommended that providing enough education, initiating a non-punitive
culture may help increase voluntary reporting of medication errors among nurses to strengthen the
reporting system and to avert medication errors in the future.