Medication errors are one of the most important threats for patients’ safety. It is an old problem of hospitals and medical centers (
1,
2). Administration of intravenous drugs, failure to use appropriate equipment, drawing blood, and monitoring patients during surgery are the most important reasons for medication errors (
3-
9). Medication errors can be solved in any environment with patient’s admission (
1,
10). Medication error is any damage, risk, and avoidable incidences occurred during the medication practices in order to monitor the patients (
11-
14). Increased hospital stay, adverse economic consequences, hospital costs, the incidence of health problems, failure in treatment, and mortality are the most important outcomes of medication errors (
13,
15). Therefore, the prevention of medication errors through identification and control of causing factors can be very effective (
16). In recent years, patients’ safety is one of the most important concerns in the hospitals and medical centers (
5,
17). Based on the obtained results, several recent studies by the Institute of Medicine reported a high incidence of medication errors (
15,
18). These injuries can lead to a significant stress and anxiety for health care staff (HCWs) (
17,
19,
20). According to the results of USA hospitals, approximately 400,000 injuries are reported each year attributed to the medication errors. Based on the published reports, medication errors were responsible for at least US$ 3.5 billion loss annually (
18,
21). A recent review of mediation errors indicated that it affected 1% to 2% of all hospitalized patients and prescribing error was the most common type of medication error in such settings (
12,
22). Reporting medication errors lead to save patients’ lives and safety; it is also counted as a valuable information source to prevent further mistakes in the future (
6,
7,
21). The important factors that affect medication errors and refusal to report such errors include incorrect diagnosis, incorrect dosage, prescription errors in time and type of drug, shortage of nursing staff, , errors in administration route, failure to administer the drug, improper placement of infusion pumps, absence of recording the drug administration, the health status of the patient, the type of hospital and ward, fear of the consequences of reporting errors, threats made by the management, fear of evaluation score, and the lack of knowledge about related policies (
23-
29). Among all medical errors, drug errors are the most common ones that cause injuries. Drug administration is considered as an important aspect of patients’ care process and reporting errors is needed to maintain safety. Several studies are conducted on the rates and causes of medication errors based on nursing staff reports (
30,
31). Concerns about the medications administered during hospital stay and monitoring patients can affect the treatment (
31-
33). Nurses, because of their position, can play a great role to reduce the risk of medication errors (
31,
34-
36). Encouraging nurses, proper drug administration, appropriate training, using suitable instruments, and decreasing direct patient-nurse contact can increase the reporting of errors. Increase in the report of medication errors can help to manage the outcomes and reduce injuries (
31-
33,
37). Mohammadnejad et al. in Tehran, Iran, studied the refusal of the nurses to report medication errors in the emergency department (
38). An investigation in Arak, Iran, evaluated the association between fear of reporting medication errors and the outcomes (
39). In another study conducted in 4 hospitals of Mashhad, Iran, the viewpoints of nurses toward the causes of medication errors and barriers to report in hospitals were evaluated in Mashhad University of Medical Sciences. They indicated that the most important reasons for the failure to report the errors were the lack of adequate knowledge about related policies and negligence to report (
40). Hosseinzadeh in Tabriz and Maragheh, Iran, studied the viewpoints of nurses toward the barriers of error reporting. According to the results of the current study, managerial factors were the most cited barriers (
41). According to the literature, preparation of educational bulletins and increased knowledge of authorities about refusal to report medication errors can be considered as a major step in the management and control of medication errors.