Stability means the time during which the drug product remain in its same property and characters. Stability study necessary during the decomposition of active drug, toxic product may be formed. In manufacturing, good formulation will taken long time for decomposition. Drug degradation has studied individually but it time consuming. In accelerated stability testing to predict the shelf life of a product by accelerating the rate of decomposition, preferably by testing the temperature of reaction condition. In this rapid detection in the formulation prediction of shelf life, protect reputation of producer, established storage condition. There are different stages of drug development during stability study. Some basic principle of stability testing follow during testing of product i.e. selection of batches and samples, testing criteria, analytical procedure, specification, storage condition, number of batches, packaging material, evaluation, testing frequency, storage period, stability information.
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