Describe the design of an OROS controlled release tablet (type used in Adalat OROS)

Describe the design of an insoluble matrix tablet (used to produced controlled/extended/sustained release)

Cardizem CD capsules are controlled release and are capsules with beads inside. Explain how controlled release is produced

Some cardiovascular drugs are sustained/extended release tablets that are hydrophilic matrix design. Explain how extended/sustained release is produced in this design