Abstract
Self-medication refers to the use of medications without consulting a doctor. This study aimed to determine the effect of education on students’ knowledge about self-medication of mefenamic acid using Powerpoint slides at the Luhur Islamic Boarding School in Malang City. This was quantitative research with a pre-experimental method and a one-group pretest-posttest design. The number of samples needed was determined using the Slovin formula, and 70 respondents participated. Data were collected using a questionnaire. Respondents filled out the pretest questionnaire to determine the knowledge related to self-medication of the drug mefenamic acid, then the researcher delivered the education by using Powerpoint slides and after that the posttest questionnaire was distributed. The data were analyzed using the Wilcoxon test. The pretest and posttest values were significantly different (p < 0.05). Therefore, we can conclude that education about self-medication of mefenamic acid using Powerpoint slides had an effect on the knowledge of students at the Luhur Islamic Boarding School in Malang.
 Keywords: self-medication, mefenamic acid, education, Powerpoint slides, knowledge level
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