Pharmaceutical compositions comprising low doses of sensitive complexes between an estrogen and a cyclodextrin are provided with improved stability. In specific embodiments the composition comprises a complex between ethinyl estradiol and &bgr;-cyclodextrin in a granulate preparation and in yet another embodiment the composition comprises a limited amount of polyvinylpyrrolidone since this excipient was found to degrade ethinyl estradiol. Furthermore, a method for improving the stability of an estrogen in a composition and for manufacturing such a stable composition is provided. Essentially, the granulate preparation are manufactured under careful control of the relative humidity.
本发明提供了含有
雌激素和
环糊精之间低剂量敏感复合物的制药组合物,其稳定性得到了改善。在特定实施例中,该组合物包括
乙炔雌
酚和β-
环糊精之间的复合物,以颗粒制备的形式呈现。在另一个实施例中,该组合物包括有限量的聚
乙烯吡咯烷酮,因为发现这种赋形剂会降解
乙炔雌
酚。此外,本发明提供了一种改善组合物中
雌激素稳定性并制造这种稳定组合物的方法。基本上,颗粒制备是在相对湿度的谨慎控制下制造的。