Perphenazine–fumaric acid salts with improved solubility: preparation, physico-chemical characterization and in vitro dissolution
作者:Giovanna Bruni、Mariarosa Maietta、Lauretta Maggi、Marcella Bini、Doretta Capsoni、Stefania Ferrari、Massimo Boiocchi、Vittorio Berbenni、Chiara Milanese、Amedeo Marini
DOI:10.1039/c2ce25846c
日期:——
New compounds of perphenazine and fumaric acid in 2â:â1 and 1â:â2 molar ratios have been prepared by solvent evaporation with the aim of increasing the drug solubility. Their physico-chemical properties were thoroughly characterized by differential scanning calorimetry, powder X-ray diffraction, Fourier infrared spectroscopy and scanning electron microscopy coupled with energy dispersive X-ray spectrometry. In addition, the crystal structure of the 2â:â1 salt was determined by single-crystal X-ray diffraction. The pharmaceutical characterization included solubility and dissolution studies in comparison with the commercial product Trilafon®. Perphenazine solubility is strongly pH-dependent: the binary systems show improved solubility and intrinsic dissolution rate compared with perphenazine, but only the capsule formulation containing the 1â:â2 dihydrate sample shows a quick and complete dissolution behaviour at neutral pH. This sample could represent an interesting perphenazine formulation to improve drug bioavailability and perhaps reduce in vivo variability even when the gastric fluid pH is increased by the presence of food.
已经通过溶剂蒸发法制备了不同摩尔比的氟哌噻吨和富马酸新化合物,旨在提高药物的溶解度。通过差示扫描量热法、粉末X射线衍射、傅里叶变换红外光谱及扫描电子显微镜结合能量色散X射线光谱,对其物理化学性质进行了详细表征。此外,2:1盐的晶体结构通过单晶X射线衍射法进行确定。药物特性表征包括溶解度和溶出研究,并与商业产品Trilafon®进行比较。氟哌噻吨的溶解度与pH密切相关:与氟哌噻吨相比,二元体系表现出改善的溶解度和内在溶出速率,但只有含有1:2二水合物样品的胶囊制剂在中性pH条件下显示出快速和完全的溶解行为。该样品可能代表了一种有趣的氟哌噻吨制剂,有望提高药物生物利用度,并可能减少即使在食物存在下胃液pH升高时的体内变异。