Low-Melting Phenytoin Prodrugs as Alternative Oral Delivery Modes for Phenytoin: A Model for Other High-Melting Sparingly Water-Soluble Drugs
作者:Yumiko Yamaoka、Richard D. Roberts、Valentino J. Stella
DOI:10.1002/jps.2600720420
日期:1983.4
measured. The prodrugs were more readily soluble in various metabolizable glycerol esters such as tributyrin, trioctanoin, and triolein than phenytoin. The solubility of the prodrugs in the various organic vehicles studies was closely correlated to the melting point of the prodrug: the lower the melting point the greater the solubility. The cleavage rates of the prodrugs in plasma and tissue homogenates
苯妥英钠是一种高熔点,弱酸性和微水溶性的药物。由于这些理化特性,苯妥英钠在酸性和钠盐两种形式的各种剂型中都具有不稳定的生物利用度。合成了一系列苯妥英钠的3-酰氧基甲基衍生物(乙酰基至癸酰基),并测量了各种理化性质。与苯妥英相比,前药更容易溶于各种可代谢的甘油酯,如三丁酸甘油三酯,三辛酸甘油酯和三油酸甘油酯。前药在各种有机载体研究中的溶解度与前药的熔点密切相关:熔点越低,溶解度越大。血浆和组织匀浆中前药的裂解率与链长呈抛物线关系。