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This study examined the selection of small amounts of excipients capable of improving the compactability of ibuprofen, thereby enabling the miniaturization of ibuprofen tablets. Various glidants in amounts of 1% of the total volume were added to dry surface-modified ibuprofen, and the tensile strengths of the resulting tablets were evaluated. The characteristics of the excipients that affected the tensile strengths of the tablets were then extracted using a tensile strength prediction model. We confirmed that the effective angle of the internal friction of the mixed powder, the coating form of the glidant, the packing fraction of the raw material, and the mixed powder affect the tensile strength of the tablet. A smooth particle layer was formed on the surface of the ibuprofen particles when a glidant with a packing fraction of &lt;0.05 was used. In the sample with a smooth particle layer, the angle of the critical state line increased significantly and the tensile strength improved. We inferred that the smoothness of the particle layer allowed the ibuprofen particles to come into close contact with each other. Consequently, the number of junctions increased, and the frictional force between the particles improved, resulting in tablets with improved tensile strengths. In conclusion, the compactability of ibuprofen was improved by adding 1% glidant with a packing fraction of &lt;0.05. The reduction in excipients will allow the creation of smaller tablets, making them easier to swallow. Therefore, the medication adherence of customers will be improved.

Selection of Small Amounts of Glidant Capable of Improving the Tensile Strength of Ibuprofen Tablets