Advance Techniques of Bilayer tablet: A Review

Abstract

Bilayer tablet is new era for the successful development of controlled release formulation along with various
features to provide a way of successful drug delivery system. Bi-layer tablets developing a combination of two
or more Active Pharmaceutical Ingredients (API) in a single dosage form (bilayer tablet) has increased in the
pharmaceutical industry, promoting patient convenience and compliance. For a variety of reasons: patent
extension, therapeutic, marketing to name a few. To reduce capital investment, quite often existing but modified
tablet presses are used to develop and produce such tablets. This article explains why the development and
production of quality bi-layer tablets needs to be carried out on purpose-built tablet presses to overcome
common bi-layer problems, such as layer-separation, insufficient hardness, inaccurate individual layer weight
control, cross-contamination between the layers, reduced yield, etc. Using a modified tablet press may therefore
not be your best approach to producing bilayer tablet under GMP-condition. Especially when in addition high
production output is required.