mirena

Mirena is a hormone-releasing intrauterine device (IUD) that contains the active ingredient levonorgestrel, a synthetic progestin. It is a T-shaped plastic device inserted into the uterus by a healthcare provider. Mirena provides long-term contraception for up to 8 years and is also approved for the treatment of heavy menstrual bleeding (menorrhagia) in women who choose an IUD for contraception, with efficacy for up to 5 years[1][2][4][5][7]. The mechanism of action involves local release of levonorgestrel in the uterine cavity, which thickens cervical mucus to inhibit sperm passage, alters the endometrial lining to prevent implantation, and may partially suppress ovulation in some users[3][4][6]. Only small amounts of hormone reach systemic circulation. Mirena does not contain estrogen and should not be used as emergency contraception.

Brand names

Mirena

Other names

levonorgestrel-releasing intrauterine systemlevonorgestrel IUD