OBJECTIVES: The study was designed to assess the impact of Pharmacist intervention on medication errors (administration errors) in pediatric ward BMCH Quetta, Pakistan. METHODS: The study was intervention based pre-post analysis.Pre-Intervention data was collected from pediatric ward BMCH, Quetta from the period of OCT-2015 to Nov-2015, intervention was designed as education lectures and change in patient treatment chart. Post-Intervention groups were divided into two groups, intervention group –I (education only) and intervention group –II (education and patient treatment chart), intervention was conducted and post-intervention data was collected from the period of JAN-2016 to FEB-2016.Data was analyzed by using SPSS version 20. RESULTS: Pre-Interventions; the total drug administration were 8179, out of which total errors were recorded 6718(82.13%), which include 6607 (98.34%) were omission errors, followed by 43(0.64%) wrong time error, and 41(0.63%) un-authorized drug error. Post intervention; the total drug administrations were 7995, out of which total errors were 3134 (39.04%), in which errors occurred by intervention group were only education was provided. The total errors were 2043 (52.74%) out of 3873 (total drug administration), where as in intervention group where education was provided along with placement of pediatric medication administration record sheet (PMARS) , total errors were 1091 (26.46%) out of 4122 (total drug administration).In intervention group – II all error were only omission errors and no other error was reported. CONCLUSIONS: Pharmacist intervention reduces the medication errors significantly and promote better health outcome and reduces the risk of adverse drug events.