Investigating the influence of processing conditions on dissolution and physical stability of solid dispersions with fenofibrate and mesoporous silicaBaumgartner, Ana (Avtor) Dobaj, Nina (Avtor) Planinšek, Odon (Avtor) mesoporous silicaamorphous solid dispersionsolvent evaporation methodfenofibrate dissolutionphysical stabilityThe study aimed to enhance the solubility of the poorly water-soluble drug, fenofibrate, by loading it onto mesoporous silica, forming amorphous solid dispersions. Solid dispersions with 30% fenofibrate were prepared using the solvent evaporation method with three solvents (ethyl acetate, acetone, and isopropanol) at different temperatures (40 °C, boiling point temperature). Various characteristics, including solid-state properties, particle morphology, and drug release, were evaluated by different methods and compared to a pure drug and a physical mixture of fenofibrate and silica. Results revealed that higher solvent temperatures facilitated complete amorphization and rapid drug release, with solvent choice having a lesser impact. The optimal conditions for preparation were identified as ethyl acetate at boiling point temperature. Solid dispersions with different fenofibrate amounts (20%, 25%, 35%) were prepared under these conditions. All formulations were fully amorphous, and their dissolution profiles were comparable to the formulation with 30% fenofibrate. Stability assessments after 8 weeks at 40 °C and 75% relative humidity indicated that formulations prepared with ethyl acetate and at 40 °C were physically stable. Interestingly, some formulations showed improved dissolution profiles compared to initial tests. In conclusion, mesoporous silica-based solid dispersions effectively improved fenofibrate dissolution and demonstrated good physical stability if prepared under appropriate conditions.20242024-04-24 12:01:23Članek v reviji155933UDK: 544.351.3:615.45ISSN pri članku: 1999-4923DOI: 10.3390/pharmaceutics16050575COBISS_ID: 193690883sl