羟丙基甲基纤维素在药品中有什么作用

2025-04-03 08:58:31
推荐回答(2个)
回答1:

1、作薄膜包衣材料和成膜材料,常用粘度5-15mPa.S。本品低粘度者用作片剂、丸剂的水溶性薄膜包衣料,使用浓度可在50%左右;高粘度者用于非水溶性薄膜包衣,使用浓度为2~10%。
2、作粘合剂和崩解剂,常用粘度30-100 mPa.S本品低粘度者作片剂、丸剂、颗粒剂的粘合剂和崩解剂,高粘度者仅作粘合剂,用量因型号和要求不同而异,一般为2~5%。
3、作增稠剂和胶体的保护胶,作增稠剂常用浓度为0.45~1.0%。用于增加疏水胶的稳定性,防止粒子聚结、沉淀,常用浓度为0.5~1.5%。
4、作阻滞剂、控释剂和致孔道剂,常用粘度4000 mPa.S、10000 mPa.S、15000 mPa.S、100000 mPa.S mPa.S高粘度型号用于制备混合材料骨架缓释片、亲水凝胶骨架缓释片的阻滞剂和控释剂;低粘度型号用于缓释或控释片的致孔道剂,使这类片剂迅速获得治疗作用的首剂量,然后再缓释或控释,以维持血中有效浓度。
5、作助悬剂,本品高粘度者是混悬型液体制剂的良好的助悬剂,其常用量为0.5~1.5%

回答2:

苏诺克化工提供——
1、包衣:将包衣剂制成有机溶剂的溶液或者水溶液给药片,特别是给制成的颗粒进行喷雾包衣。
2、缓下剂:以每天2-3克,每次1-2G的投料量,于4-5天显出效果。
3、眼药:由于甲基纤维素水溶液的渗透压与眼泪相同,因此对眼睛刺激小,添加眼药中,作为接触眼球水晶体的润滑剂。
4、胶冻剂:作为胶冻状外用药或者软膏的基料。
5、浸渍药:作为增稠剂,保水剂。

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