配方干预以克服低Tg无形药物的动力溶解性降低的方法
Mangesh S Bordawekar1, Madhu Pudipeddi2,3, Colleen E Ruegger1
1Technical Portfolio and Project Management, Technical Research and Development, Novartis Pharmaceuticals Corporation, East Hanover, New Jersey, 07936, USA.
AAPS PharmSciTech
|July 7, 2023
概括
无形药物NVS-1由于烧结而经历了显著的溶解速率损失,这是一个由湿度和接近其玻璃过渡温度 (Tg) 的温度加剧的粒子聚变过程. 重制努力部分减轻了这种影响,但在高湿度条件下仍然存在挑战.
科学领域:
- 制药科学 制药科学
- 材料科学 材料科学 材料科学
- 物理化学 物理化学
背景情况:
- 含有无形药物的干混合囊配方可能面临稳定性挑战,特别是在溶解速度方面.
- 无形固体分散在加速储存条件下 (温度和湿度升高) 容易发生物理不稳定,包括烧结.
- 无形材料的玻璃过渡温度 (Tg) 是影响其物理稳定性和烧结倾向的关键参数.
研究的目的:
- 在加速稳定性研究中,研究无形药物NVS-1在干混合囊配方中的溶解速度损失.
- 阐明观察到的溶解速率下降背后的机制,重点关注粒子形态和烧结.
- 评估配方修改对无形药物的稳定性和溶解性能的影响.
主要方法:
- 在各种温度和相对湿度 (RH) 条件下对NVS-1囊配方进行了加速稳定性研究 (例如40°C/75%RH,50°C/75%RH).
- 在存储样本上进行溶解速率测试,以量化药物释放的损失.
- 扫描电子显微镜 (SEM) 用于描述粒子形态,并确定存储样本中烧结的证据.
主要成果:
- 在6个月后在40°C/75%RH下观察到溶解速率显著下降 (≤40%的初始值).
- 在SEM分析中,发现了具有"融化和融合"形态的粒子聚合,表明无形NVS-1粒子的烧结.
- 湿度起到塑化剂的作用,降低粘度并促进烧结,因为储存温度接近药物的Tg (76°C).
- 使用L-HPC和蒸二氧化的再配制,以及去除crospovidone,改善了短期稳定性,但在高湿度下仍然存在烧结.
结论:
- 无形NVS-1粒子的烧结,由温度,湿度和Tg的接近驱动,是溶解速率损失的主要原因.
- 湿度吸附导致部分溶解,形成粘性层,阻碍溶解介质的透,进一步减缓释放.
- 对于含有大量药物 (34%) 的配方来说,在高湿度条件下减轻烧结具有挑战性;未来的策略包括吸水器,降低药物负载和优化分解剂.
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