There are several types of controlled release systems, each with its own advantages and limitations:
Matrix Systems: The active ingredient is dispersed within a matrix, and release occurs through diffusion or matrix erosion. Reservoir Systems: The active ingredient is enclosed within a reservoir, and release is controlled by a surrounding membrane. Osmotic Systems: These systems use osmotic pressure to achieve a controlled release of the active ingredient. Microencapsulation: The active ingredient is encased in microcapsules, which release their contents over time.
