CN100464752C - 格拉司琼巴布剂及其制法 - Google Patents
格拉司琼巴布剂及其制法 Download PDFInfo
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Abstract
本发明涉及医药技术领域,是5-HT3受体拮抗剂格拉司琼(Granisetron)的一种新剂型——巴布剂。格拉司琼为临床上预防和治疗因细胞毒治疗(抗肿瘤化疗和放疗)引起的恶心及呕吐等症状的药物,现有的剂型为口服剂型(如片剂、胶囊剂)和注射剂型。但是格拉司琼已有剂型存在不足,注射剂使用不便,需有专业人员帮助使用;口服给药有较强的首过代谢,且病人往往因为胃肠道反应造成服药困难。本发明以盐酸格拉司琼或其游离碱为主药,加不同的辅料制成巴布剂,通过透皮途径给药,不仅可以避免口服给药的首过效应,降低全身的血药浓度,减少毒副反应,维持恒定有效血药浓度,而且具有减少给药次数,使用方便,提高病人用药的顺应性及生活质量等优点,为格拉司琼的临床应用提供了一种新的剂型。
Description
技术领域:
本发明涉及医药技术领域,是5-HT3受体拮抗剂格拉司琼(Granisetron)的一种新剂型——巴布剂。
背景技术:
格拉司琼是强效、高选择性外周和中枢神经系统5-HT3受体拮抗剂,用于预防和治疗因细胞毒治疗(抗肿瘤化疗和放疗)引起的恶心及呕吐等症状,与其他传统型止吐药物相比,具有高效、低毒、安全可靠等优点,已广泛应用于临床。目前,该药的药物剂型有片剂、胶囊剂、注射剂,但是已有剂型存在不足,注射剂使用不便,需有专业人员帮助使用;口服给药有较强的首过代谢,且病人往往因为胃肠道反应造成服药困难;不能有效维持稳定的血药水平。
发明内容:
本发明提供一种格拉司琼的透皮给药制剂——巴布剂。
透皮给药制剂能够避免口服给药肝脏的首过效应,降低全身的血药浓度,减少毒副反应,维持恒定有效血药浓度;而且具有减少给药次数,使用方便,提高病人的顺应性等优点。因此,将格拉司琼设计成透皮给药制剂,通过缓慢持续低剂量给药,不仅能够保持其良好的治疗效果,而且克服以往剂型的不足,提高药物使用便利性和病患依从性。
格拉司琼巴布剂包括背衬层、药物储库层和防粘层三层。药物储库层由盐酸格拉司琼或其游离碱和基质组成。其基质由骨架材料、交联剂和保湿剂剂组成,亦可含有促透剂、消泡剂和交联调节剂。骨架材料选自明胶、羧甲基纤维素钠、聚乙烯吡咯烷酮、D—山梨醇、部分中和聚丙烯酸(NP—700、NP—600)、高岭土或氧化锌,可同时选用其中的1—6种化合物;交联剂选自Ca(OH)2、Al(OH)3、CaCl2、AlCl3中的一种;保湿剂为丙二醇和甘油;促透剂选自二甲基亚砜、氮酮、油酸、N-甲基吡咯烷酮类、十二烷基硫酸钠、水杨酸、薄荷脑、樟脑、柠檬烯、肉豆蔻异丙脂、水溶性氮酮,可同时选用其中的1—6种化合物,优选氮酮;消泡剂选自乙醇、异丙醇、正丁醇、戊醇、正辛醇、油酸、聚乙二醇、磷酸三丁酯、聚丙二醇中的一种;交联调节剂为柠檬酸。优选组分及配比为:盐酸格拉司琼0.2—1份,明胶1—2份,羧甲基纤维素钠2—4份,聚乙烯吡咯烷酮4—6份,D—山梨醇32—40份,部分中和聚丙烯酸(NP—700)1—2份,高岭土或氧化锌1—2份,Ca(OH)2、Al(OH)3、CaCl2或AlCl30.12—0.36份、甘油2—10份、丙二醇8—18份、蒸馏水60份;促透剂的用量为药物储库层的0.5—10%;消泡剂的用量为药物储库层的0—2%;交联调节剂的用量为药物储库层的0—1%。
本发明巴布剂的制备方法为:
1、制备(I)相溶液:按上述配比将明胶加水充分溶胀,将盐酸格拉司琼或其游离碱与D-山梨醇混合均匀后加入明胶中,充分搅拌,得(I)相溶液;
2、制备(II)相溶液:将羧甲基纤维素钠、聚乙烯吡咯烷酮、部分中和聚丙烯酸(NP-700)、保湿剂、促透剂、高岭土或氧化锌以及交联调节剂混合均匀,得(II)相溶液;
3、将(I)、(II)相溶液混合,加入规定量的交联剂,搅拌均匀,铺于无纺布上,50℃烘适当时间,覆盖上防粘膜,切割成规定大小的巴布剂,密封包装。
本发明将格拉司琼制成巴布剂,通过透皮途径给药,不仅可以避免口服给药的胃肠道刺激和肝脏的首过效应,降低全身的血药浓度,减少毒副反应,维持恒定有效的血药浓度,而且可以通过给药面积的调整控制给药剂量,也可随时中断给药,使用方便,减少给药次数,提高了病人用药的顺应性,为格拉司琼的临床应用提供了一种新的剂型。
具体实施方式:
实施例1 制备-格拉司琼巴布剂
组分及配比:
明胶 2g NP-700 2g
羧甲基纤维素钠 4g Ca(OH)2 0.3g
聚乙烯吡咯烷酮 6g 丙二醇 20g
D-山梨醇 38g 高岭土 2g
蒸馏水 60g 氮酮 8g
甘油 8g 盐酸格拉司琼 0.6g
聚乙二醇—200 1g
制备方法为:
1、制备(I)相溶液:按上述配比将明胶加水充分溶胀,60℃水浴下溶解,将D-山梨醇、盐酸格拉司琼混合均匀后加入明胶中,充分搅拌,得(I)相溶液。
2、制备(II)相溶液:将氮酮溶于丙二醇中,与羧甲基纤维素钠、聚乙烯吡咯烷酮、部分中和聚丙烯酸(NP-700)、高岭土、混合均匀,得(II)相溶液。
3、将(I)、(II)相溶液混合,加入甘油,聚乙二醇-200(PEG-200)、Ca(OH)2,充分搅拌,铺于无纺布上,50℃烘90分钟,覆盖上防粘膜,切割成4×5cm2的巴布剂,密封包装,即得成品巴布剂,每贴含药量10mg。
实施例2 制备格拉司琼巴布剂
组分及配比:
明胶 2g NP-700 0.2g
羧甲基纤维素钠 4g Al(OH)3 0.18g
聚乙烯吡咯烷酮 4g 丙二醇 20g
D-山梨醇 32g 氧化锌 4g
蒸馏水 60g 樟脑 6g
甘油 10g 柠檬酸(20%) 0.4ml
异丙醇 1g 盐酸格拉司琼 0.6g
制备方法为:
1、制备(I)相溶液(同实施例1)。
2、制备(II)相溶液:将樟脑溶于丙二醇中,与羧甲基纤维素钠、聚乙烯吡咯烷酮、部分中和聚丙烯酸(NP-700)、氧化锌、柠檬酸混合均匀,得(II)相溶液。
3、将(I)、(II)相溶液混合,加入甘油,异丙醇、Al(OH)3,充分搅拌,铺于无纺布上,50℃烘60分钟,覆盖上防粘膜,切割成4×5cm2的巴布剂,即得成品巴布剂,密封保存,每贴含药量10mg。
实施例3 制备格拉司琼巴布剂
配方及配比:
明胶 2g NP-700 0.6g
羧甲基纤维素钠 3g AlCl3 0.2g
聚乙烯吡咯烷酮 6g 丙二醇 20g
D-山梨醇 36g 高岭土 6g
蒸馏水 60g 氮酮 8g
甘油 10g 柠檬酸(20%) 0.4ml
油酸 0.5g 格拉司琼游离碱 0.6g
制备方法为:
1、制备(I)相溶液:(同实施例1)。
2、制备(II)相溶液:将氮酮、丙二醇与羧甲基纤维素钠、聚乙烯吡咯烷酮、NP-700、高岭土、柠檬酸混合均匀,得(II)相溶液。
3、将(I)、(II)相溶液混合,加入甘油,油酸、AlCl3,充分搅拌,铺于无纺布上,50℃烘30分钟,覆盖上防粘膜,切割成4×5cm2的巴布剂,即得成品巴布剂,密封保存,每贴含药量10mg。
采用改良Franz扩散池,将实施例1制成的格拉司琼巴布剂,进行体外透皮吸收试验,离体透皮吸收试验结果符合零级动力学过程,渗透速率为13.909μg·cm-2·h-1,24h累积透皮量为55.08%,见表1。对在化疗、放疗中均伴有严重的恶心、呕吐症状的癌症患者进行初步临床观察,巴布剂可贴于患者臂、腿、胸或腹等部位,两日一贴,结果表明85%以上的患者恶心感明显减轻,呕吐症状得到控制或消除。未见红肿瘙痒等过敏性表现。
表1 格拉司琼巴布剂透过大鼠腹部皮肤的渗透情况
Claims (2)
1、一种格拉司琼巴布剂,包括背衬层、药物储库层和防粘层,其特征在于药物储库层由药物盐酸格拉司琼或其游离碱和基质组成,基质由骨架材料、交联剂、保湿剂组成,骨架材料由明胶、羧甲基纤维素钠、聚乙烯吡咯烷酮、D-山梨醇,和部分中和聚丙烯酸NP-700或NP-600,和高岭土或氧化锌组成;交联剂选自Ca(OH)2、Al(OH)3、CaCl2、AlCl3中的一种,保湿剂为丙二醇和甘油;各组分的重量配比为:明胶1—2份、羧甲基纤维素钠2—4份、聚乙烯吡咯烷酮4—6份、D—山梨醇19—40份、部分中和聚丙烯酸NP-700或NP-600 1—2份、高岭土或氧化锌1—2份、Ca(OH)2或Al(OH)3或CaCl2或AlCl30.12—0.36份、甘油2—10份、丙二醇8—18份、蒸馏水60份、盐酸格拉司琼或其游离碱0.2—1份。
2、如权利要求1所述的格拉司琼巴布剂,其特征在于组分和配比如下:
明胶 2g 部分中和聚丙烯酸NP-700 2g
羧甲基纤维素钠 4g Ca(OH)2 0.3g
聚乙烯吡咯烷酮 6g 丙二醇 20g
D—山梨醇 38g 高岭土 2g
蒸馏水 60g 氮酮 8g
甘油 8g 盐酸格拉司琼 0.6g
聚乙二醇—200 1g。
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