Mirena is a form of birth control that is 99 percent effective at preventing pregnancy. It is a levonorgestrel (progesterone) releasing intrauterine system, also known as an IUD. It is made of soft flexible plastic that is inserted by your healthcare practitioner during a regular office visit. The Mirena IUD may be used for up to five years, and may be removed at any time if pregnancy is desired. Although this method of birth control is highly effective as well as effortless, there are some side effects that you should be aware of.
Pain and Dizziness
Pain, dizziness and bleeding may occur during and after placement of the Mirena IUD. These symptoms are normal and should stop within 30 minutes after placement. If they do not, it may mean that it is not placed correctly and your health care provider should be notified.
Changes in Bleeding
Irregular bleeding and spotting between menstrual periods is another common side effect of Mirena. This usually occurs during the first three to six months and then may subside. According to the manufacturer, about two out of 10 women stop having a menstrual period after one year of Mirena use. If you experience bleeding that remains heavier than usual or becomes heavy after a period of time contact your health care provider.
Ovarian Cysts
According to the manufacturer, about 12 out of every 100 women develop a cyst on their ovary. These types of cycts usually disappear on their own within a few months. These cyst may cause pain and discomfort. If you experience pain in your lower pelvis on one or both sides, you may want to be checked for the presence of a cyst. In rare cases, these cysts may require surgery.
Expulsion
Mirena may come out on its own. If it does, fertility is restored and you may become pregnant. If this happens a back-up method of birth control should be used.
