Marta De Diego

By Sigrid Mennickent, Marta de Diego, Mario Vega and Carmen Gloria Godoy

Part of the book: Quality Control of Herbal Medicines and Related Areas

By Sigrid Mennickent, M. de Diego, B. Schulz, M. Vega and C. G. Godoy

Part of the book: Latest Research into Quality Control

By Sigrid Mennickent and Marta de Diego

The authors have developed and validated some chromatographic methods with the aim of quantifying drugs as drug substance and drug product, suitable for stability and quality control studies, as at original products as at its remainder doses. The stability of a pharmaceutical is defined by its resistance to different chemical, physical, and microbiological reactions that may change their original properties. The stability of a pharmaceutical product is closely related to its potency; therefore, whether the compounds are degraded, a decrease of the therapeutic effect or changes in their toxicological properties can be produced, affecting their efficacy and safety, which becomes important to maintain a stable pharmaceutical product and to have the analytical tools to demonstrate stability. Therefore, stability-indicating methods are required to the quality control of pharmaceuticals. Analytical methods presented here are useful stability-indicating methods to analyze drugs and have adequate linearity, precision, accuracy, selectivity, and LOD/LOQ values. The examples presented here are stability-indicating methods since they allow the determination of drugs in the presence of their degradation products, according to the International Conference on Harmonization (ICH) guidelines.

Part of the book: Quality Management and Quality Control