Coating is a process involving the application of coating material to the moving bed of core material. Coating is done to confer benefits from the dosage form in respect of its appearance and its function. With the improved technologies and innovations there is occurring a increase in competition to produce a better dosage form and the coating process is one of the field which is being used as a tool to produce a better dosage form according to the requirements but there is an inherent opposition to changes expressed by pharmaceutical manufacturers towards accepting major changes in the processing technologies which is leading to the advancements and modifications in the conventional coating process . There has been seen modification of the different processing parameters like spray pattern, spray time, type of coating material, drying methods, etc which led to development of dry coating, compression coating, magnetic coating, etc with reduced air pollution, high time and energy consumption and expensive operation cost as encountered by liquid coating. Thus, the change tends to be gradual in spite of drastic, means it is “Evolutionary rather than Revolutionary”. So as a result, there has been seen many modifications in the tableting and coating process to meet the required specifications according to the needs.
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