Solid dispersions based on organic polymers can have stability issues. Inorganic solids, especially those based on silica chemistry, may be suitable alternatives to organic polymers due to their pre-formed pore system, high absorptivity, and commercial availability in pharmaceutical quality. Mesoporous granulated colloidal silicon dioxide has been studied with class II and IV actives of the Biopharmaceutics Classification System for its ability to improve dissolution. Using suitable formulation strategies, the dissolution of these APIs could be significantly increased. The absorption of poorly soluble APIs onto silicon dioxide can, therefore, be considered a viable formulation path to overcome solubility challenges.
