Page 25 - controlled drug delievery
P. 25

1- Diffusion controlled systems

           Drug             Insoluble membrane

Diffusion        Reservoir  Single unit         Coated beads
controlled          type                        Microcapsules
                             Multiple
   DDS            Matrix       units
                    type

                            Drug +Insoluble Matrix
   20   21   22   23   24   25   26   27   28   29   30