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    • 7. 发明申请
    • pH-responsive film for intravaginal delivery of a beneficial agent
    • 用于阴道内递送有益剂的pH响应膜
    • US20060018951A1
    • 2006-01-26
    • US10912814
    • 2004-08-06
    • Manoj ManiarShoreh Parandoosh
    • Manoj ManiarShoreh Parandoosh
    • A61K9/14A61K9/70
    • A61K9/0036A61K9/7007
    • The present invention provides a delivery system for the intravaginal administration of prophylactic and therapeutic agents. In one embodiment, the invention provides a pH-responsive, biocompatible film for intravaginal administration of a beneficial agent, comprising a biocompatible, hydrophilic polymer that is positively charged at a first pH and in electronically neutral form at a higher pH; an effective amount of a beneficial agent; and, optionally, at least one film-forming binder. The pH responsive film may also include other additives such as plasticizers, sustained release polymers, antioxidants, and antimicrobial agents. In another embodiment, the pH-responsive film of the present invention comprises a laminated composite of (a) a bioadhesive layer that serves to affix the film to a mucosal surface within the vagina and, laminated thereto, (b) at least one reservoir layer comprising at least one beneficial agent and a biocompatible hydrophilic polymer. The pH responsive films of the present invention can be used for contraception, treatment and/or prevention of viral infections, treatment of vaginal infections, relief of vaginal itch, vaginal cleansing, and enhancement of vaginal lubrication.
    • 本发明提供了阴道内施用预防和治疗剂的递送系统。 在一个实施方案中,本发明提供用于阴道内施用有益剂的pH响应性生物相容性膜,其包含在较高pH下以第一pH和电子中性形式带正电的生物相容性亲水性聚合物; 有效量的有益剂; 和任选的至少一种成膜粘合剂。 pH响应膜还可以包括其它添加剂,例如增塑剂,缓释聚合物,抗氧化剂和抗微生物剂。 在另一个实施方案中,本发明的pH响应薄膜包括层压复合物,其包含(a)用于将膜粘贴到阴道内的粘膜表面并且层压在其上的生物粘附层,(b)至少一个储层 包含至少一种有益剂和生物相容的亲水性聚合物。 本发明的pH响应薄膜可用于避孕,治疗和/或预防病毒感染,治疗阴道感染,缓解阴道瘙痒,阴道清洁和增强阴道润滑。