Three novel cocrystals of a non-steroidal anti-inflammatory drug, flufenamic acid (FFA) with theophylline (TP), 2-pyridone, and 4,4′-bipyridine were discovered in a cocrystal screening. All the cocrystals were thoroughly characterized and their crystal structures were determined. In the crystal structures, the FFA molecule interacts with the coformers via heterosynthons. The pharmaceutical relevance of the FFA·TP cocrystal prompted us to investigate its physicochemical properties and compare it with a reported FFA cocrystal with nicotinamide. In particular, properties such as stability, hygroscopicity, solubility, and dissolution rate were measured. FFA·TP was found to offer better solubility and dissolution rate; in addition, it also helps to circumvent the hygroscopic nature of TP. The fact that the FFA·TP cocrystal involves two active ingredients and shows better physicochemical properties than all other known cocrystals of FFA makes it a promising cocrystal for development of FFA formulations and combination drug products.
在一次共晶体筛选中,发现了非甾体抗炎药
氟芬那酸(FFA)与茶碱(TP)、2-
吡啶酮和 4,4′-联
吡啶的三种新型共晶体。对所有共晶体进行了全面的表征,并确定了它们的晶体结构。在晶体结构中,FFA 分子通过杂合成子与共晶体相互作用。FFA-TP 共晶体的药用价值促使我们对其理化性质进行研究,并将其与已报道的含有烟酰胺的 FFA 共晶体进行比较。特别是对稳定性、吸湿性、溶解度和溶解速率等特性进行了测量。研究发现,FFA-TP 具有更好的溶解度和溶解速率;此外,它还有助于避免 TP 的吸湿性。事实上,FFA-TP 共晶体包含两种有效成分,与所有其他已知的 FFA 共晶体相比,它具有更好的理化性质,因此是一种很有前途的共晶体,可用于开发 FFA 制剂和复方药物产品。