The stability study is one of the very important parameter for pharmaceutical products. Stability studies are performed at various stages of drug development process to assure efficacy of drug. Stability is an essential factor of quality, safety and efficacy of a drug product. The objective of stability study is to determine the estimation of shelf life, the time period of storage at a specified condition within which the drug product still meets its established specifications. Present article provides an overview of types of stability testing, its application in pharmacy and regulatory guidelines. Stability testing is basically done to achieve a safer quality of drug product. Forced degradation studies (stress testing) are very important tool in pharmaceutical research and development to predict long-term stability. Stress studies should be performed in method development to understand drug behavior but also can be performed with method validation for regulatory filling predict stability and measure impurities.
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