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Mirena (Levonorgestrel Intrauterine) - Summary



MIRENA ® (levonorgestrel-releasing intrauterine system) consists of a T-shaped polyethylene frame (T-body) with a steroid reservoir (hormone elastomer core) around the vertical stem. The reservoir consists of a cylinder, made of a mixture of levonorgestrel and silicone (polydimethylsiloxane), containing a total of 52 mg levonorgestrel. The reservoir is covered by a silicone (polydimethylsiloxane) membrane. The T-body is 32 mm in both the horizontal and vertical directions. The polyethylene of the T-body is compounded with barium sulfate, which makes it radiopaque. A monofilament brown polyethylene removal thread is attached to a loop at the end of the vertical stem of the T-body.

MIRENA ® is indicated for intrauterine contraception for up to 5 years. Thereafter, if continued contraception is desired, the system should be replaced.

See all Mirena indications & dosage >>


Media Articles Related to Mirena (Levonorgestrel)

Domestic violence deters contraception
Source: Abortion News From Medical News Today [2015.04.02]
Domestic violence takes many forms. The control of a woman's reproductive choices by her partner is one of them.

'15 million unwanted pregnancies' created by low contraception in 35 poorer countries
Source: Abortion News From Medical News Today [2015.02.05]
Some 90% of the 16.7 million unwanted pregnancies across a third of the world's population every year are due to a failure to use modern contraception, study suggests.

Research reveals more than half of young women who have abortions were using contraception when they fell pregnant
Source: Abortion News From Medical News Today [2014.04.30]
Reproductive health charity Marie Stopes UK has launched the findings of the first research in the UK into the contraceptive use of women aged 16-24 having one or more abortions.

Adolescent women 'more likely to have unsafe sex' if obese
Source: Sexual Health / STDs News From Medical News Today [2015.07.01]
Obese adolescent women were found less likely to use contraception than their peers with healthy weights, with those that did use contraception less likely to use it consistently.

Female cystic fibrosis patients need more contraceptive guidance, study finds
Source: Cystic Fibrosis News From Medical News Today [2015.05.11]
As life span for once-deadly disease increases, unplanned and mistimed pregnancies are commonOnly half of women with cystic fibrosis (CF) report using contraception and frequently apt to become...

more news >>

Published Studies Related to Mirena (Levonorgestrel)

An overview of four studies of a continuous oral contraceptive (levonorgestrel 90 mcg/ethinyl estradiol 20 mcg) on premenstrual dysphoric disorder and premenstrual syndrome. [2012]
and premenstrual syndrome (PMS)... CONCLUSIONS: These data, although not consistent, indicate that continuous LNG/EE

Ethinyl estradiol and levonorgestrel pharmacokinetics with a low-dose transdermal contraceptive delivery system, AG200-15: a randomized controlled trial. [2011.11.29]
BACKGROUND: This study evaluated the ethinyl estradiol (EE) and levonorgestrel (LNG) pharmacokinetic profiles of AG200-15, a transdermal contraceptive delivery system, compared with a combination oral contraceptive (COC) containing EE 35 mcg and norgestimate 250 mcg... CONCLUSIONS: EE and LNG daily exposure during AG200-15 treatment was within the range reported for a low-dose COC. The daily EE dose with AG 200-15 was equivalent to a 30-mcg COC and was safe and well tolerated. Copyright (c) 2011 Elsevier Inc. All rights reserved.

Naproxen or estradiol for bleeding and spotting with the levonorgestrel intrauterine system: a randomized controlled trial. [2011.09.24]
OBJECTIVE: The purpose of this study was to evaluate whether oral naproxen or transdermal estradiol decreases bleeding and spotting in women who are initiating the levonorgestrel-releasing intrauterine system... CONCLUSION: The administration of naproxen resulted in a reduction in bleeding and spotting days compared with placebo. Copyright A(c) 2011 Mosby, Inc. All rights reserved.

Immediate versus delayed insertion of the levonorgestrel-releasing intrauterine device following dilation and evacuation: a randomized controlled trial. [2011.09.13]
BACKGROUND: The study was conducted to compare 6-month usage of the levonorgestrel-releasing intrauterine device (LNG-IUD) when placed immediately or 3 to 6 weeks after dilation and evacuation (D&E) procedure... CONCLUSION: Significantly more participants had the LNG-IUD placed in the immediate insertion group compared with the delayed insertion group. Given the low risk of complications, immediate post-D&E insertion of the LNG-IUD should be offered, especially for populations that may have difficulty returning for follow-up. Copyright (c) 2011 Elsevier Inc. All rights reserved.

Efficacy and safety of a levonorgestrel enteric-coated tablet as an over-the-counter drug for emergency contraception: a Phase IV clinical trial. [2011.09]
BACKGROUND: An enteric-coated levonorgestrel emergency contraceptive pill (E-LNG-ECP) is an improved formulation, in terms of side effects, which both dissolves and is absorbed in the intestine. Our aim was to evaluate the efficacy and safety of E-LNG-ECP as an over-the-counter (OTC) drug for emergency contraception (EC) in Chinese women... CONCLUSIONS: The study found that E-LNG-ECP was effective, safe and well tolerated as an OTC drug. However, an randomized controlled trial should be performed to compare standard LNG tablets with E-LNG-ECP.

more studies >>

Clinical Trials Related to Mirena (Levonorgestrel)

Mirena Efficiency and Tolerability During the First Year of Use [Completed]
In this trial the efficacy and safety of Mirena was investigated during the first year of use

A Study Comparing Mirena and Systemic Progestin for Endometrial Hyperplasia [Recruiting]
Randomized controlled multi-center study with three arms including 200 patients with low risk endometrial hyperplasia. After confirmed diagnosis the patients will receive one of the following treatments:

1. Provera (Medroxyprogesterone (MPA)/progestin) 10 mg per oral treatment for 6 months 10 day each cycle,

2. MPA 10 mg continuously for 6 months,

3. Mirena (Levonorgestrel) impregnated IUD for 6 months.

Postplacental or Delayed Insertion of the Levonorgestrel-IUD After Vaginal Delivery [Active, not recruiting]
This study is a randomized controlled trial comparing 6 month usage rates of the levonorgestrel-releasing intrauterine device (LNG-IUD) when inserted postplacentally after vaginal delivery or delayed placement at 6-8 weeks postpartum. Given the high rate of unintended pregnancy in the United States, particularly in postpartum women, there is a need for reliable, effective, long-term contraception such as the IUD in postpartum women. Postplacental insertion of intrauterine contraception would help to address this need. The primary hypothesis of this study is that use of the LNG-IUD at 6 months after vaginal delivery will be higher in women who have immediate postplacental insertion as compared to delayed insertion 6-8 weeks following delivery.

Mirena Intrauterine System Timing of Insertion: A Randomized Controlled Trial [Recruiting]
In order to determine the timing of LNG-IUS insertion that results in a greater proportion of women using the LNG-IUS at 6-months post-partum, we will perform a randomized control trial of interval versus immediate post-placenta insertion. Women will be enrolled at 36-weeks gestation and greater. At the time of vaginal delivery, women will be randomized to receive either immediate post-placenta insertion of the LNG-IUS or routine insertion at 4-8 weeks post-partum. All patients will return at 4-6 weeks post-insertion and 6 months post-partum to confirm correct position of the LNG-IUS. The primary outcome of this sub-study is the number of LNG-IUS in the correct position at 6-months. Secondary outcomes include assessing the safety of post-placental LNG-IUS insertion and difference in acceptability and symptoms experienced by participants. This is a sub-study of the Contraceptive Choice Project, a prospective cohort study that aims to improve the use of long-acting contraception by removing financial barriers which has already enrolled over 5,000 patients. Association of this study with CHOICE offers unique advantages including infrastructure to support subject recruitment, retention and completion of follow-up as well as covering the cost of LNG-IUS devices.

We hypothesize that, despite higher expulsion rates, women randomized to receive the LNG-IUS immediately after placenta delivery will have higher rates of LNG-IUS continuation due to poor rates of follow up in the interval insertion group. This is likely to be particularly noticeable in our patient population, which is largely uninsured with poor access to healthcare. Further, typical symptoms of LNG-IUS insertion include bleeding and cramping, which may be disguised by the post-partum period. Published reports of immediate post-placenta insertion focus on expulsion rates and do not report on symptoms and satisfaction rates.

A Study of a Levonorgestrel-Releasing Intrauterine System for Long-Term, Reversible Contraception [Recruiting]
The primary objective of this study is to assess the efficacy of a levonorgestrel-releasing intrauterine system (LNG20) in nulliparous and parous females of child-bearing potential who request long-term, reversible contraception.

more trials >>

Reports of Suspected Mirena (Levonorgestrel) Side Effects

Device Expulsion (4424)Device Dislocation (1921)Abdominal Pain (789)Vaginal Haemorrhage (787)Pregnancy With Contraceptive Device (664)Genital Haemorrhage (629)Pain (525)Procedural Pain (470)Uterine Perforation (424)Amenorrhoea (402)more >>


Based on a total of 1 ratings/reviews, Mirena has an overall score of 3. The effectiveness score is 10 and the side effect score is 4. The scores are on ten point scale: 10 - best, 1 - worst.

Mirena review by 31 year old female patient

Overall rating:  
Effectiveness:   Highly Effective
Side effects:   Severe Side Effects
Treatment Info
Condition / reason:   birth control
Dosage & duration:   standard (dosage frequency: one time insertion good for five years) for the period of 3 years
Other conditions:   n/a
Other drugs taken:   n/a
Reported Results
Benefits:   the treatment benefits were that i did not get pregnant nor did i get a period. occasional spotting but nothing a pantiliner couldn't handle.
Side effects:   the side effects are individual and unfortunately you don't know which ones will effect you the most. my personal side effects were horrible acne, weight gain, hair loss, extreme irritability.
Comments:   just like with any iud you wait for your menstrual cycle to start and have the device inserted then. this was three months after my children were born. approximately one month later i started noticing that my skin was starting to break out really bad, especially on my mid face down, neck, chest and back. i was getting very large cysts which i never had even as a kid. normal zits every now and then but never ones that would leave a scar. when treatments and products wouldn't help i called my obgyn and they told me that was "a common side effect, sorry." well over the course of the next few months i stopped getting a period but would know when my period should've been here because my mood swings were out of control. i would get so angry over nothing. and the next day i would get some cramping. i started keeping track of this and realized that these episodes were happening about every four weeks or so. i also have never felt so bloated and swollen in my life. i sometimes wake up and my fingers don't have any lines on the knuckles. exercise helps this, but i still can't seem to lose those "last 10" pounds. i've spoken to other women who have similiar if not worse effects than me. but the consensus is always that something negative happened after they got it.

See all Mirena reviews / ratings >>

Page last updated: 2015-07-01

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