Synergetic Role of Hypromellose and Methacrylic Acid Copolymer in the Dissolution Improvement of Amorphous Solid Dispersions

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Synergetic role of polymer blending on dissolution of amorphous solid dispersion was investigated. Dissolution rates of hypromellose (HPMC) and methacrylic acid copolymer (EUD) from the HPMC/EUD spray-dried sample (SPD) were improved compared to those of each single polymer SPD. Differential scanning calorimetry measurements revealed that the structural change in HPMC following heating was inhibited by co-spray-drying with EUD, suggesting an intermolecular interaction between the polymers.

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