A REVIEW ON TABLET MODIFIED DRUG DELIVERY AND COATING TECHNOLOGY

The tablet is one of the most favorable and highly used solid dosage forms. The coating is defined as methods in which the desired dosage form may be a tablet or granule coated with an outer dry film to obtain particular objectives such as masking taste or protecting against environmental conditions. Among three types of tablet-coating processes (sugar coating, film coating, and press coating), film coating is the most generally used approach to solve various issues experience during manufacturing, storage, transport, and clinical use of drug products. The various tablet modified technologies are diffusion system, dissolution system, osmotic system, ion exchange resin, floating systems, bio-adhesive systems, matrix systems and stimuli inducing releasing. As tablet coating is a process driven by technology, it relies on advancements in coating techniques uses, equipment used for the coating process, examination of coated tablets, and coated material used. Polymers play a vital role in coating technology; sometimes, they are used for changing the delivery of dosage forms, taste masking, and film forming agent.

Keywords: Tablets, Coatings, Modified drug delivery, Tablet evaluations.