**5. Manufacturing technology**

In the past decades, layered tablets have been gaining attention, thus increasing the requirement for the development of newer formulation techniques and technologies. However, most of the techniques are the same as that of a conventional tablet, some variations in compression are necessary. It is important to analyze physio-chemical properties, cohesive properties, compression, and compaction profiles of all the layers used individually before the production of layered tablets. The ultimate objective is to produce stable layered tablets, that remain in a single unit, without layer separation and reduce the bulk of the tablet [5, 16, 17].
