Mirena (generic: levonorgestrel) is a prescription medication that is a hormone-releasing system placed in the uterus to prevent pregnancy for up to 5 years. It is also used to lessen menstrual blood loss in women who have heavy menstrual flow and who also want to use a birth control method that is placed in the uterus to prevent pregnancy. Mirena belongs to a group of drugs called progestins which change the lining of the uterus, alter cervical mucus, and make it difficult for sperm to enter the uterus.
This medication comes in the form of a plastic device that is inserted by a healthcare provider into the uterus.
Common side effects of Mirena include irregular menstrual periods, back pain, headache, and nausea.