A Practical Solid Form Screen Approach To Identify a Pharmaceutical Glutaric Acid Cocrystal for Development
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Abstract
Pharmaceutical cocrystals could be used to improve the physicochemical properties of active pharmaceutical ingredients. Here, a practical solid form screen approach to identify pharmaceutical cocrystals in the early development stage is proposed. This approach first used a cogrinding screen to identify potential cocrystal former leads that could form cocrystals with the compound of interest, followed by a solvent-based screen to identify, evaluate, and generate the cocrystal candidates. This approach not only allows fast identification of the cocrystal candidates but also provides insights on their scalability. Using this approach for the development drug candidate, a glutaric acid cocrystal was identified that provided an improved intrinsic dissolution rate in comparison to that of the free form, and therefore this cocrystal is potentially a better solid form for development. The effects of solvents and structures of cocrystal formers on the cocrystal formation and the rationales for this approach are also discussed.
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