A gel formation, which is inherently spermicidal and which provides an efficient delivery system for spermicidal and other contraceptively effective compounds intravaginally is disclosed. A contraceptive composition incorporating it comprises:
a) a contraceptively effective amount of a sperm function inhibitor;
b) between about 10% and 30% by weight of a polyoxyethylene-polyoxypropylene block copolymer, having an average molecular weight between about 5,000 and 15,500; and
c) water, and, optionally, other non-toxic pharmaceutically acceptable excipients.
本发明公开了一种凝胶体,它本身具有杀精子的作用,并能为阴道内杀精子和其他避孕有效化合物提供有效的递送系统。 含有它的避孕组合物包括:a) 避孕有效量的精子功能
抑制剂;b) 约 10%至 30%(按重量计)的聚氧
乙烯-聚氧
丙烯嵌段共聚物,其平均分子量约在 5,000 至 15,500 之间;以及 c)
水和其他无毒的药学上可接受的赋形剂。