Classification of Floating Drug Delivery System

Floating Drug Delivery Systems can be broadly divided into following categories:

1. Non-Effervescent systems

          A.   Single layer Floating Tablet

          B.   Bilayer Floating Tablet

          C.   Alginate beads

          D.   Hollow microspheres   

2. Effervescent systems 

A.Gas Generating systems

              -tablets/capsules

             -Multiple unit type floating pills

             -Floating systems with ion-exchange resin

B.    Volatile liquid/ Vacuum systems

-Inflatable gastrointestinal drug delivery systems 

-Intragastric osmotically controlled drug delivery