Abstract
This paper was designed to assess the value of quality by design (QbD) to improve the manufacturing process understanding of botanical drug products. Ethanol precipitation, a widely used unit operation in the manufacture of botanical drug products was employed to illustrate the use of QbD, taking the process of danshen (the dry root of Salvia miltiorrhiza Bunge) as an example. The recovery of four active pharmaceutical ingredients (APIs) and the removal of saccharides were used to represent the performance of ethanol precipitation. Potentially critical variables, including density of concentrate, ethanol consumption, and settling temperature were identified through risk assessment methods. Design of experiments (DOE) was used to evaluate the effects of the potentially critical factors on the performance of ethanol precipitation. It was observed that higher density of concentrate leads to higher removal of saccharides, but results in lower recovery of APIs. With the rise of ethanol consumption, the recovery of different APIs behaves in different ways. A potential design space of ethanol precipitation operation was established through DOE studies. The results in this work facilitate the enhanced understanding of the relationships between multiple factors (material attributes and process parameters) and the performance of ethanol precipitation. This case study demonstrated that QbD is a powerful tool to develop manufacturing process of botanical drug products.
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This work was financially supported by the China International Science and Technology Cooperation Project (2010DFB33630) and Zhejiang Provincial Natural Science Foundation of China (LQ12H29004).
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Zhang, L., Yan, B., Gong, X. et al. Application of Quality by Design to the Process Development of Botanical Drug Products: A Case Study. AAPS PharmSciTech 14, 277–286 (2013). https://doi.org/10.1208/s12249-012-9919-8
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DOI: https://doi.org/10.1208/s12249-012-9919-8