Odeku O A, Itiola O A
Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, University of Ibadan, Ibadan, Nigeria.
Drug Dev Ind Pharm. 2003 Mar;29(3):311-20. doi: 10.1081/ddc-120018205.
A study of the comparative effects of khaya gum and two standard binding agents-polyvinylpyrrolidone (PVP) and gelatin--on crushing strength and friability, and the disintegration and dissolution characteristics of paracetamol tablets was made. The crushing strength-friability ratio (CSFR), the disintegration times, D, and the dissolution times t50, t90, and t1 (derived from the equation of Noyes and Whitney), all increased with an increase in binder concentration; however, the dissolution rate constants, k1 and k2, decreased. The ranking for the values of CSFR for tablets containing the different binders was PVP > gelatin > khaya gum. The ranking for D and the dissolution times was gelatin > khaya gum > PVP, whereas the ranking for the dissolution rate constants was PVP > khaya gum > gelatin. There were significant linear correlations between CSFR, D, t50, t90, and t1 for the tablets. There were also significant correlations between k1 and D, t50, t90, and t1, and between k2 and t90. The results suggest that khaya gum could be useful as an alternative binding agent to produce tablets with particular mechanical strength and drug release profiles.
对卡亚胶与两种标准粘合剂——聚乙烯吡咯烷酮(PVP)和明胶——对扑热息痛片的抗压强度、脆碎度以及崩解和溶出特性的比较效果进行了研究。抗压强度-脆碎度比(CSFR)、崩解时间D以及溶出时间t50、t90和t1(由诺伊斯-惠特尼方程得出)均随粘合剂浓度的增加而增加;然而,溶出速率常数k1和k2则降低。含有不同粘合剂的片剂的CSFR值排序为PVP>明胶>卡亚胶。D和溶出时间的排序为明胶>卡亚胶>PVP,而溶出速率常数的排序为PVP>卡亚胶>明胶。片剂的CSFR、D、t50、t90和t1之间存在显著的线性相关性。k1与D、t50、t90和t1之间以及k2与t90之间也存在显著相关性。结果表明,卡亚胶可用作替代粘合剂,以生产具有特定机械强度和药物释放曲线的片剂。