Description
Colloidal silica is a versatile ingredient in pharmaceutical formulations.
1. As a glidant: It reduces the inter-particle forces of drug particles, enhances granulation and tabletting performance, prevents sticking in gel plasters, and optimizes drug properties through adsorption, improving the uniformity and flowability of oily, high-moisture and poorly soluble drugs. Its anti-static property also helps prevent powder electrostatic adhesion during fluidized bed granulation.
2. As a grinding aid: It promotes the grinding and refinement of raw materials, enhances the disintegration of dispersible tablets, serves as a drug carrier for sustained release and targeted drug delivery, and increases efficacy while reducing side effects.
3. In semi-solid preparations: It provides thickening and thixotropic effects, facilitating storage, application and preventing drug flow.
4. For insoluble drugs: It adsorbs particles to prevent aggregation, ensuring uniform dispersion of drugs in oral suspensions.
5. In creams: It thickens, prevents sedimentation and separation, and ensures accurate dosing.
6. In inhalation preparations: It improves the flowability and dispersibility of drug powders, facilitating pulmonary absorption.