Mirena trademark (levonorgestrel-releasing intrauterine system) 52 mg

Important Safety Information

If you have a pelvic infection, get infections easily, or have certain cancers, don't use Mirena. Less than 1% of users get a serious pelvic infection called pelvic inflammatory disease (PID). If you have persistent pelvic or stomach pain or if Mirena comes out, tell your healthcare provider (HCP)... Continue below

What to expect after placement of Mirena

When you start Mirena, it's important to pay close attention to your body and the changes it may go through.

While your body is adjusting, you may notice the following:

In the first 3 to 6 months,

Your period may be irregular

Your period may be heavier at first and the number of bleeding days may increase

You may have frequent spotting or light bleeding

A few women may find that their periods are heavier than normal. Some women have heavy bleeding during this time. Call your healthcare provider if your period continues to be heavier than usual.

After you have used Mirena for a while:

The number of bleeding and spotting days is likely to lessen

There is a small chance that your period will stop altogether

These effects may continue for as long as you have Mirena. However, your period is likely to return once Mirena is removed. If you haven't gotten your period for 6 weeks or more during Mirena use, or you feel like you may be pregnant, call your healthcare provider to rule out pregnancy.

Mirena may also affect heavy periods in other ways. The number of spotting and bleeding days may initially increase but then typically decreases in the months that follow. Bleeding may also continue to be irregular. Call your healthcare provider if bleeding becomes heavy after it has been light for a while.

Checking your threads

With Mirena, there’s no daily routine. However, you will need to do a self-check of the threads of your Mirena once a month to make sure it’s where it’s supposed to be. Ask your healthcare provider to explain how.

The threads attached to Mirena are the only part you should feel when it is in your uterus. If you feel more than just the threads, Mirena is not in the right position and may not prevent pregnancy.

If you have trouble finding the threads or feel more than just the threads, call your healthcare provider right away. And in the meantime, use a non-hormonal form of birth control as a back-up.

No birth control is right for everyone and there are risks associated with Mirena that you should know about. For detailed information about possible side effects, some potentially serious, please see Mirena Safety Considerations and the Patient Information.

Removal or replacement of Mirena

At the end of 5 years with Mirena, it's up to you whether to remove or replace it. Remember, Mirena can be removed at any time by your healthcare provider and you can try to get pregnant right away. About 8 out of 10 women who try to become pregnant after removal of Mirena will become pregnant within one year.

If you and your healthcare provider choose to replace Mirena with a new one after 5 years, be sure to:

Let your healthcare provider know in advance so he or she can remove your current Mirena and replace it during the same visit—removal, like placement, takes only a few minutes

Schedule a follow-up visit 4 to 6 weeks after your new Mirena is placed to check that it's in the right position

Graphic representation of thickness of uterine lining with and without Mirena