CN115137696A - 一种托拉塞米注射液及其制备方法 - Google Patents
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- 229960005461 torasemide Drugs 0.000 title claims abstract description 32
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- 229940068918 polyethylene glycol 400 Drugs 0.000 claims description 21
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 claims description 21
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- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 2
- 150000001413 amino acids Chemical class 0.000 claims description 2
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- XPFJYKARVSSRHE-UHFFFAOYSA-K trisodium;2-hydroxypropane-1,2,3-tricarboxylate;2-hydroxypropane-1,2,3-tricarboxylic acid Chemical compound [Na+].[Na+].[Na+].OC(=O)CC(O)(C(O)=O)CC(O)=O.[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O XPFJYKARVSSRHE-UHFFFAOYSA-K 0.000 claims description 2
- 239000007853 buffer solution Substances 0.000 claims 2
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Abstract
本发明公开一种托拉塞米注射液,注射液包含托拉塞米、助溶剂、pH缓冲剂、碱、酸和水。该注射液避免使用乙醇和活性炭,符合FDA的指标要求,避免发生溶血作用、避免给患者带来疼痛感;同时稳定性好,杂质含量少,制备工艺简单且溶解速度快,适合工业化生产的要求。
Description
技术领域
本发明属于医药领域,具体涉及一种托拉塞米注射液及其制备方法。
背景技术
托拉塞米,化学名为1-[4-(3-甲基苯基)氨基吡啶-3-基]磺酰-3-异丙基脲,分子式为C16H20N4O3S,是新一代高效髓袢利尿剂。经近30年临床应用证实,托拉塞米适应症广,利尿作用迅速强大且持久,不良反应发生率低,更符合药物经济学要求,是临床上值得推广的一类高效利尿剂。
托拉塞米的结构式如下:
CN105997860B公开了一种托拉塞米注射液,所用增溶剂为乙醇,且含量为10%~20%(w/w)。根据FDA IID数据库显示,乙醇的最大使用量是1.5%w/v,专利中用量从表示上判断已经超过限度,不符合FDA的标准;同时,根据《药剂学》教科书,乙醇浓度超过10%时可能会有溶血作用或疼痛感,对患者的恢复产生不利的影响;此外,该方法的制备过程中使用了活性炭,不符合关于注射剂一致性评价中“注射剂生产中不建议使用活性炭”的要求。
发明内容
本发明目的在于提供一种托拉塞米注射液及其制备方法,上述注射液避免使用乙醇和活性炭,符合FDA的指标要求,避免发生溶血作用、避免给患者带来疼痛感;同时稳定性好,杂质含量少,制备工艺简单且溶解速度快,适合工业化生产的要求。
为了解决上述技术问题,本发明采用的技术方案如下。
一种托拉塞米注射液,注射液包含托拉塞米、助溶剂、pH缓冲剂、碱、酸和水。
进一步地,助溶剂为聚乙二醇400、丙二醇、甘油中的一种或多种。
进一步地,pH缓冲剂为枸橼酸-枸橼酸钠缓冲体系、磷酸盐缓冲体系、三羟甲基氨基甲烷-盐酸缓冲体系、磷酸盐缓冲体系、氨丁三醇、氨基酸中的一种或多种。
进一步地,碱为碳酸氢钠、氢氧化钠、氢氧化钾、碳酸氢钾中的一种或多种。
进一步地,酸为盐酸、磷酸、枸橼酸中的一种或多种。
进一步地,注射液包含5~20mg托拉塞米、100~500mg聚乙二醇400、2~10mg氨丁三醇、适量氢氧化钠、适量盐酸和适量注射用水。
更进一步地,注射液包含8~12mg托拉塞米、200~250mg聚乙二醇400、4~6mg氨丁三醇、适量氢氧化钠、适量盐酸和适量注射用水;更为优选地,所述注射液包含10mg托拉塞米、225mg聚乙二醇400、4.8mg氨丁三醇、适量氢氧化钠、适量盐酸和适量注射用水。
进一步地,盐酸的浓度为0.05~1mol/L。
进一步地,氢氧化钠为氢氧化钠水溶液;优选地,氢氧化钠水溶液的浓度为1~3mol/L;更优选地,氢氧化钠水溶液的浓度为2~3mol/L。
一种托拉塞米注射液的制备方法,包含如下步骤:
(1)在注射用水中加入托拉塞米分散;
(2)加入氢氧化钠溶液,搅拌至溶液澄清后继续搅拌;
(3)加入聚乙二醇400,搅拌混匀,再加入氨丁三醇,搅拌至溶解后用盐酸调节pH,补水;
(4)过滤灌装。
具体实施方式
实施例1注射液处方考察
处方组成为:氢氧化钠、氨丁三醇、聚乙二醇400、盐酸、注射用水、托拉塞米。
本发明的实验方案为将上述处方中氢氧化钠用量确定,盐酸用于pH调节,因此只需考察聚乙二醇400、氨丁三醇的用量。
(1)聚乙二醇400用量的考察,如表1所示。
表1
处方 | 处方1 | 处方2 | 处方3 |
托拉塞米 | 10mg | 10mg | 10mg |
聚乙二醇400 | 100mg | 225mg | 300mg |
氨丁三醇 | 0.1mg | 0.1mg | 0.1mg |
2.5mol/L氢氧化钠 | 0.12ml | 0.12ml | 0.12ml |
盐酸 | 适量 | 适量 | 适量 |
注射用水 | 2ml | 2ml | 2ml |
(2)氨丁三醇用量的考察,如表2所示。
表2
处方 | 处方2 | 处方4 | 处方5 | 处方6 | 处方7 |
托拉塞米 | 10mg | 10mg | 10mg | 10mg | 10mg |
聚乙二醇400 | 225mg | 225mg | 225mg | 225mg | 225mg |
氨丁三醇 | 0.1mg | 0.5mg | 1.0mg | 2.4mg | 4.8mg |
2.5mol/L氢氧化钠 | 0.12ml | 0.12ml | 0.12ml | 0.12ml | 0.12ml |
盐酸 | 适量 | 适量 | 适量 | 适量 | 适量 |
注射用水 | 2ml | 2ml | 2ml | 2ml | 2ml |
(3)考察指标
针对以上7种处方,对性状、pH、有关物质(HPLC分析法)进行了考察,如表3和表4所示。
表3
表4
比较处方1、2和3,聚乙二醇400加入量主要影响杂质B和最大单杂的变化,加入量越大,杂质B和除B以外的最大单杂有增加的趋势,但是由于有少量可见异物,故不宜采用上述三种处方。
比较处方2、4、5、6和7,氨丁三醇加入量越大,最大单杂有降低趋势;氨丁三醇加入量越大,pH趋于稳定,性状也有明显改善,当氨丁三醇加入量为4.8mg时,溶液呈无色澄清药液,没有明显可见异物。
实施例2注射剂制备工艺考察
本发明确定的处方如表5所示。
表5
物质名称 | 含量 |
托拉塞米 | 10mg |
聚乙二醇400 | 225mg |
氨丁三醇 | 4.8mg |
氢氧化钠 | 适量 |
0.1mol/L盐酸 | 适量 |
注射用水 | 2ml |
先取适量的氢氧化钠配制成2.5mol/L的氢氧化钠溶液。
聚乙二醇400在注射液中主要作为助溶剂,所以采用以下两种方式:(一)在聚乙二醇400中分散托拉塞米,再加氢氧化钠溶液溶解;(二)在水中分散托拉塞米,加氢氧化钠溶液溶解后再加入聚乙二醇400。上述两种方式平行考察,发现方式(一)溶液混浊,托拉塞米无法溶解,而采用方式(二)的聚乙二醇加入方式不存在该问题。
综上,制备工艺如下:
(1)取80%注射用水,加入托拉塞米分散5min;
(2)缓慢加入氢氧化钠溶液,搅拌至溶液澄清后继续再搅拌5min;
(3)缓慢加入聚乙二醇400,搅拌混匀,再加入氨丁三醇,搅拌至完全溶解,用盐酸调节pH;
(4)补水至全量,继续搅拌10min;
(5)经过滤至灌装缓冲罐;
(6)灌装和轧盖。
应当说明的是,以上所述仅为本发明的较佳实施例而已,并不用于限制本发明的范围,凡在本发明的精神和原则之内所作出的任何修改、等同的替换和改进等,均应包含在本发明的保护范围之内。
Claims (10)
1.一种托拉塞米注射液,其特征在于,所述注射液包含托拉塞米、助溶剂、pH缓冲剂、碱、酸和水。
2.根据权利要求1所述的注射液,其特征在于,所述助溶剂为聚乙二醇400、丙二醇、甘油中的一种或多种。
3.根据权利要求1-2中任一项所述的注射液,其特征在于,所述pH缓冲剂为枸橼酸-枸橼酸钠缓冲体系、磷酸盐缓冲体系、三羟甲基氨基甲烷-盐酸缓冲体系、磷酸盐缓冲体系、氨丁三醇、氨基酸中的一种或多种。
4.根据权利要求1-3中任一项所述的注射液,其特征在于,所述碱为碳酸氢钠、氢氧化钠、氢氧化钾、碳酸氢钾中的一种或多种。
5.根据权利要求1-4中任一项所述的注射液,其特征在于,所述酸为盐酸、磷酸、枸橼酸中的一种或多种。
6.根据权利要求1-5中任一项所述的注射液,其特征在于,所述注射液包含5~20mg托拉塞米、100~500mg聚乙二醇400、2~10mg氨丁三醇、适量氢氧化钠、适量盐酸和适量注射用水。
7.根据权利要求6所述的注射液,其特征在于,所述注射液包含8~12mg托拉塞米、200~250mg聚乙二醇400、4~6mg氨丁三醇、适量氢氧化钠、适量盐酸和适量注射用水;优选地,所述注射液包含10mg托拉塞米、225mg聚乙二醇400、4.8mg氨丁三醇、适量氢氧化钠、适量盐酸和适量注射用水。
8.根据权利要求6-7中任一项所述的注射液,其特征在于,所述盐酸的浓度为0.05~1mol/L。
9.根据权利要求6-8中任一项所述的注射液,其特征在于,所述氢氧化钠为氢氧化钠水溶液;优选地,所述氢氧化钠水溶液的浓度为1~3mol/L;更优选地,所述氢氧化钠水溶液的浓度为2~3mol/L。
10.根据权利要求6-9中任一项所述的注射液,其特征在于,所述注射液的制备方法包含如下步骤:
(1)在注射用水中加入托拉塞米分散;
(2)加入氢氧化钠溶液,搅拌至溶液澄清后继续搅拌;
(3)加入聚乙二醇400,搅拌混匀,再加入氨丁三醇,搅拌至溶解后用盐酸调节pH,补水;
(4)过滤灌装。
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