OBJECTIVE:To prepare Carbinoxamine maleate sustained-release suspension,and evaluate its quality. METH-ODS:Using carbinoxamine maleate as raw material,drug-loaded resin was prepared by cation exchange resin;surface coating method was used to finally prepare sustained-release suspension,using Eudragit RS100 as sustained-release coating material to pre-pare sustained-release microparticles. HPLC was conducted to determine the content of carbinoxamine maleate,release degree of original preparations and self-made suspensions was compared,drug-loading capacity was calculated. RESULTS:The drug amount in preparing drug-loaded resin was 2%,reaction temperature was 25 ℃,and reaction time was 4 h;the drug-loading capacity in surface coating was 35%,amount of coating material was 10%,and reaction temperature was 40 ℃. The drug-loading capacities of sustained particles before and after coating were 35.23%,32.72%,respectively;the yield was 96.82%. The carbinoxamine ma-leate in prepared sustained-release suspension accounted for 98.76% of the labeled amount;release degree in 10 h reached about 80%,f2 was 65.73. CONCLUSIONS:Carbinoxamine maleate sustained-release suspension is prepared successfully,and its release is similar to the original preparation.%目的:制备马来酸罗托沙敏缓释混悬液并评价其质量.方法:以马来酸罗托沙敏为原料,采用阳离子交换树脂制备载药树脂;并通过表面包衣法,以Eudragit RS100为包衣材料制备缓释微粒,最终制成缓释混悬液.采用高效液相色谱法测定马来酸罗托沙敏的含量,计算载药量,比较原研制剂与自制混悬液的释放度.结果:载药树脂制备时药物用量为2%、反应温度为25℃、反应时间为4 h,表面包衣时载药量为35%、包衣材料的用量为10%、反应温度为40℃.缓释微粒包衣前、后的载药量分别为35.23%和32.72%,收率为96.82%;所制缓释混悬液中马来酸罗托沙敏占标示量的98.76%,10 h的累积释放度达80%左右,与原研制剂比较的相似因子f2为65.73.结论:成功制得马来酸罗托沙敏缓释混悬液,其释放特性与原研制剂相似.
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