Methods: The study was carried out as a quasi-experimental study in the Pediatric Surgery Clinics of a university hospital using the "Pre-Test-Post-Test Model in a Single Group". The sample of the study consisted of all high-risk drugs administered by 24 nurses working in these clinics, taking part in medication and agreeing to take part in the study. Data were collected by the researcher using the Medication Observation Form. The Form was created based on the literature, and by making use of the "10 Correct Rules in Medication" and the Medication Skills Steps in the Double Eye Control Program. In the first step, medication error rates were determined through observation method. In the second step; the Web-Based Double-Eye Control Program, which is a standard drug dose calculation and medication program created by the researchers, was started to be implemented. Medication error rates were determined again through post-intervention observation method. Informed voluntary consent, ethics committee and hospital permissions were obtained for the implementation of the study.

Background: In this study, it was aimed to examine the effect of using Web Based Double-Eye Control Program as a new decision support system in preventing errors and standardization in high-risk medications of pediatric nurses.

Methods: The study was carried out as a quasi-experimental study in the Pediatric Surgery Clinics of a university hospital using the "Pre-Test-Post-Test Model in a Single Group". The sample of the study consisted of all high-risk drugs (532 before the intervention, 538 after the intervention, a total of 1070 drug doses) administered by 24 nurses working in these clinics, taking part in medication and agreeing to take part in the study. Data were collected by the researcher using the Medication Observation Form. The Form was created based on the literature, and by making use of the "10 Correct Rules in Medication" and the Medication Skills Steps in the Double Eye Control Program. In the first step, medication error rates were determined through observation method. In the second step; the Web-Based Double-Eye Control Program, which is a standard drug dose calculation and medication program created by the researchers, was started to be implemented. Medication error rates were determined again through post-intervention observation method. Informed voluntary consent, ethics committee and hospital permissions were obtained for the implementation of the study.

Inclusion Criteria:

• The medications observed were to be in the high-risk drug group for children,
• Volunteering of nurses working in the clinic to participate in the research,
• Nurses working in the clinic should have had proper level of internet usage knowledge to use a web-based program.

Exclusion Criteria:

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The population of the research was composed of Nurses working in the Pediatric Surgery Department Clinic (Pediatric Surgery, Pediatric Surgery Intensive Care, Neonatal Surgery Intensive Care Clinics) of a university hospital in Turkey between November 2017 and June 2018, and all high-risk drugs they administered.