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Floating drug delivery system (FDDS) is the main approach to prolonging the gastric residence
time in the stomach in which the bilayer floating tablet has the main role. It is more suitable for
the treatment of local infections such as peptic ulcer, gastritis, Zollinger-Ellision syndrome, indigestion,
and other local infections related to the gastrointestinal tract and also used for systemic applications.
FDDS provides protection for those drugs which are acid labile and have a short half-life. It also improves
bioavailability, reduces drug waste, and enhances the residence time of drugs. Nowadays, various
technologies are being used for the development of FDDS. Novel drug delivery systems incorporation
into bilayer floating tablets have also broadened the role of FDDS. Polymers have the main role in
the development of FDDS, which serve as carriers for the drug and determine the gastric retention time
and drug protection. FDDS is also an easy, cheap, and more convenient method for dual drug delivery
of drugs.