| 羟丙基甲基纤维素在凝胶骨架中的含量与水溶性药物释放机制的关系 |
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| 引用本文： | 董志超,蒋雪涛. 羟丙基甲基纤维素在凝胶骨架中的含量与水溶性药物释放机制的关系[J]. 药学学报, 1996, 31(1): 43-47 |
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| 作者姓名： | 董志超 蒋雪涛 |
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| 作者单位： | 上海第二军医大学药学院药剂教研室 |
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| 摘 要： | 研究了羟丙基甲基纤维素(HPMC)在亲水凝胶骨架中的含量对水溶性药物释放机制的影响。本研究以水溶性药物卡托普利和硫酸沙丁胺醇为模型药物,通过对Peppas方程中n值的讨论,证实水溶性药物从凝胶骨架中释放的机制为非Fick扩散。结果认为30%以上的HPMC构成的凝胶骨架才能阻滞水溶性药物的释放。随着骨架中HPMC含量的增加,药物释放逐渐减慢。骨架中HPMC含量的不同将使药物释放后期偏离Higuchi线性方程,但不影响水溶性药物释放机制。
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| 关 键 词： | 羟丙基甲基纤维素 水溶性药物 释放机制 |
| 收稿时间： | 1995-01-18 |
MECHANISM OF SOLUBLE DRUG RELEASE FROM HYDROPHILIC MATRICES,THE EFFECT OF HYDROXYPROPYLMETHYLCELLULOSE CONTENT |
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| ZC Dong and XT Jiang. MECHANISM OF SOLUBLE DRUG RELEASE FROM HYDROPHILIC MATRICES,THE EFFECT OF HYDROXYPROPYLMETHYLCELLULOSE CONTENT[J]. Acta pharmaceutica Sinica, 1996, 31(1): 43-47 |
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| Authors: | ZC Dong and XT Jiang |
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| Abstract: | The effect of hydroxypropylmethylcellulose(HPMC)content on mechanism ofsol uble drug release from hydrophilic ma trix tablets was studied.Captopril and salbutamol sulphatewere chosen as model drugs.The study confirmed that soluble drugs were released by non-Fickiandiffusion mechanism by evaluating the n value in Peppas equation,The 30%of HPMC content wasregarded as the minimum content,at which dose the release of soluble drugs could be retarded. Different contents of HPMC in matrix only affected the Higuchi release patterns of soluble drugs afterabout 80%of the total drugs were released but did not change their release mechanism. |
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| Keywords: | Hydroxypropylmethylcellulose Soluble drug Release mechanism |
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