The bilayer tablet heralds a new chapter in the development of controlled-release formulations with a wide range of properties that result in an effective drug delivery technique. Controlled release dosage forms have been commonly used to increase the treatment of a variety of important drugs. Uses of bilayer tablets for anti-inflammatory and analgesic purposes are a unique feature. Bilayer tablets are useful for releasing two medications in sequence, separating two incompatible chemicals, and creating a sustained-release tablet with the first layer of immediate-release as the initial dose and the second layer as the maintenance dose. The bilayer tablet is a more modern technology that corrects the flaws of single-layer tablets. The objective of this paper is to highlight the obstacles that arise during the preparation of bilayer tablets, as well as to suggest solutions to these issues. To better comprehend bilayer tablets, kinds such as single side press, double side press, and bilayer tablet displacement press are discussed, as well as uses, pros, and disadvantages. Its drug companies have become more interested in mixing two or more APIs (active pharmaceutical ingredients) in a single dosage form to improve patient convenience and compliance throughout the last decade. Many pharmaceutical industries are now working on bi-layer tablets for a variety of purposes, including patent extension, therapeutics, and advertising. This article provides an introduction of bilayer tablet technology, highlighting the key benefits of this type of oral dosage form while also describing current issues and developments in production techniques and the quality of products. The current report covers a variety of elements of bilayer tablets.
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