In the end of 20th Century and beginning of 21st Century the technology of drug formulation has help the field of pharmacy to the great extend by providing newer technique of controlled release of drug at the site of absorption window thus providing maximum chance of absorption that to with phased manner. Hence, change in the operation is a suitable and optimized way to make the some drug more effective by slight alteration in the drug delivery. Controlled Release is also providing promising way to decrease the side effect of drug by preventing the fluctuation of the therapeutic concentration of the drug in the body. This article contains the basic information regarding controlled release tablet formulation and also the recent evaluation part of the same. The evaluation parameters discussed here are also important as it will help in optimization and standardization of formulation.
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