PHARMACOTECHNICAL DEVELOPMENT AND OPTIMIZATION OF MULTILAYERED TABLETS: AN UPDATED INDUSTRIAL REVIEW WITH EMPHASIS ON BILAYER TABLETS
Keywords:Fixed-dose combination formulations, Multilayered tablets, Novel approaches, Manufacturing improvement, Process parameters, Characterization tests
Fixed-dose combination formulations are multilayered platforms designed for solving complex medication regimens and overcoming polypharmacy problems especially in chronic diseases with geriatric patients. Multilayered tablets are considered promising avenues to combine different active pharmaceutical ingredients (APIs) for a synergic therapeutic effect, or different formulations of the same API in order to achieve a specific drug release profile. Besides, multilayered tablets can extensively help in avoiding possible interactions between different drugs, as well as optimizing each formulation individually in terms of pharmacokinetics and manufacturability. This review article discusses the most suitable materials used in the manufacturing of multilayered tablets, describes novel approaches to manufacturing improvement and process parameters, the influence of process parameters on layer adhesion, and the characterization tests of multilayered tablets.
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