7 Weird Mirena IUD Side Effects You Should Know About Before Getting One

Be aware.

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When you are using birth control like a Mirena IUD, you need to know the risks of getting it inserted. There are common and expected Mirena side effects you can anticipate.

What is Mirena? It's an IUD you can leave it in for up to five years, and it’s more reliable than birth control pills or condoms. That said, nothing is perfect and since hormones are involved, there are some potential Mirena IUD side effects to be cautious of.


Well, it turns out there's actually many side effects. According to Seema Sarin, MD, of EHE Health, "Mirena side effects can include changes in your menstruation cycle, pelvic/abdominal pain, and changes in your vaginal discharge.”

But that's not all, because your body can react to this birth control in other ways as well.

RELATED: 9 Weird Signs That Your IUD Is Moving

1. Weight fluctuations

Dr. Heather Bartos, OB/GYN FACOG, says, “Weight fluctuations are one [of the side effects]. The studies tell us it is usually 3.2 pounds gained over 3 years... it's a very common side effect.”

2. Missed periods

While Mirena (and other IUDs) have been known to lead to missed periods, if this occurs, you should consult your doctor. Missed periods can also be a sign of pregnancy, which is dangerous when wearing a IUD.


3. Long periods

Both a non-hormonal and hormone-based IUD can cause abnormally long periods.

“This usually happens after the first few months of insertion, so if you’re still experiencing these symptoms after three cycles, you should check in with your doctor,” advises Caleb Backe, a certified health and wellness expert for Maple Holistics. It’s also possible that the IUD has moved out of position or isn’t the right birth control for your body.

RELATED: What It Means If You're Cramping After IUD Insertion (And What To Do Immediately)

4. Mood swings

Any birth control with hormones can impact your mood, and Mirena is no different. If you find that this birth control is negatively affecting your mental health, check with your doctor immediately.


5. Nausea

On birth control to avoid morning sickness? Well, we have some bad news for you. Nausea or an upset stomach is pretty common on hormonal birth control, and this is expecially true with IUDs like Mirena. You may be better off with another birth control option.

6. Medical interactions

Some medications do not act well together with hormonal-based birth control and impact its ability to work. For example, if you are on the pill and take antibiotics, your birth control may not work.

“Be sure to let your doctor know of any drugs you are taking, as this medication may have potentially significant interactions,” advises Dr. Sarin.

7. Dislodging

What, what?! Though an IUD moving or falling out isn't common, it does happen. An IUD can be dislodged from bad placement, pregnancy, or something else dislodging it.


RELATED: A Guide To The Best Birth Control For Every Type Of Woman

Aly Walansky is a NY-based lifestyles writer. Her work appears in dozens of digital and print publications regularly. Visit her on Twitter or email her at alywalansky@gmail.com.