Medications are offered by health services throughout the world and under their responsibility. Medication a drug that be use for treatment, improvement and preventing the person’s health but it very dangerous if not used correctly. In hospital setting, the most reporting a medication error had done by staff nurse. The National Coordinating Council for Medication Error Reporting and Prevention mentioned medication error as ” any preventable event that may cause or lead to inappropriate medication use or patient harm while the medication is in the control of the health care professional, patient harm while the medication is in the control of the health care professional, patient or consumer. Such events may be related to professional practice, health care product, procedures, and systems, including prescribing, order communication, product labelling, packaging, and nomenclature, compounding, dispensing, distribution, administration, education, monitoring and use”. The error means, accidentally or unintentionally and medication error it’s referring to wrongly administer the medication that give the harm to the patient. Stated in America Nurse Associated (ANA) journal, ” according to the Landmark 2006 reported ” Preventing Medication Error” , these serious mistake injure 1.5million Americans every year and cost $3.5billion in lost productivity”.