• Dajeong Kim, Inmyung Song, Dongwon Yoon, and Ju-Young Shin.
• School of Pharmacy, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do, South Korea. Email: shin.jy@skku.edu.
• Am J Manag Care. 2019 Aug 1; 25 (8): e224-e229.

ObjectivesTo examine the extent of codeine prescriptions for children younger than 12 years in Korea and to investigate characteristics associated with pediatric codeine use.Study DesignA retrospective observational study was conducted to examine codeine prescriptions and patients' characteristics.MethodsWe used the Korea Health Insurance Review and Assessment Service National Patient Sample database. The study participants were patients younger than 12 years who were prescribed codeine as inpatients or outpatients between 2011 and 2016. Pediatric codeine use was defined as codeine prescribed at least once for a child younger than 12 years. The frequency and proportion of pediatric codeine users were analyzed by age group (0-2, 3-6, or 7-11 years), sex, year, region, diagnosis, type of medical institution, and coprescribed medication. Logistic regression analyses were performed to identify characteristics associated with pediatric codeine use.ResultsOf all patients younger than 12 years, 518,895 (55.8%) and 16,337 (1.7%) were treated with codeine in outpatient and inpatient settings, respectively. Odds of pediatric codeine prescriptions were highest for outpatients at clinics (adjusted odds ratio [OR], 1.19; 95% CI, 1.16-1.21) and public hospitals (adjusted OR, 1.56; 95% CI, 1.28-1.91) and for inpatients at public hospitals (adjusted OR, 8.38; 95% CI, 6.64-10.58).ConclusionsCodeine was frequently prescribed for pediatric outpatients in Korea, especially in primary care clinics. Efforts to limit codeine use in children are required to prevent the occurrence of codeine-related adverse events.

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