The community service activity was carried out in response to the high number of cases of medication misuse among children, with initial surveys showing that 65% of 4th-5th grade elementary school students in Kediri had taken medication without adult supervision, and 80% did not understand basic dosage rules. The programme, involving 44 students from SDN Bujel 3 Elementary School in Kediri City, was designed to improve health literacy through the Participatory Action Research (PAR) method, comprising three main stages: (1) initial assessment via a pre-test, (2) intervention in the form of interactive education and demonstrations on how to read medication labels, and (3) evaluation using a post-test and observation of skills. Based on the pre-test and post-test analyses, there was a 45% increase in participants' understanding, with only 40% of students correctly answering questions about medication dosages in the pre-test, increasing to 85% in the post-test. Based on these findings, it was concluded that the PAR approach effectively improved students' understanding and skills. For sustainability, the following recommendations were made: (1) developing digital modules, (2) involving parents in follow-up programmes, and (3) strengthening teachers' capacity through training as school health facilitators to ensure programme sustainability. This activity demonstrates that participatory health education can create sustainable behavioural change in school-age children.
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