초록

This invention relates to an improved intravaginal ring for use as a contraceptive comprising an inert elastomer core, a medicated layer encircling the core and an outer inert elastomer layer and method of manufacturing the intravaginal ring.

대표청구항 ▼

A shell design intravaginal ring comprising in combination a core made of an inert elastomer, a medicated layer encircling the core, and an outer inert elastomer layer having a thickness of about 0.1 to 0.6 mm, the medicated layer comprising an inert elastomer and a combination of estradiol with a p

A shell design intravaginal ring comprising in combination a core made of an inert elastomer, a medicated layer encircling the core, and an outer inert elastomer layer having a thickness of about 0.1 to 0.6 mm, the medicated layer comprising an inert elastomer and a combination of estradiol with a progestogen selected from the group consisting of levonorgestrel, d,l-norgestrel and norethindrone and the medicated layer having a thickness of not more than twice the thickness of the outer layer.