Mirena Ius

MIRENA IUS by BAYER ZYDUS PHARMA PVT LTD

Name

• Common Name: Levonorgestrel-releasing intrauterine system (IUS) or hormonal intrauterine device (IUD).
• Brand Name: Mirena.

Composition

Mirena is a T-shaped plastic frame that releases a progestogenic hormonal agent. The active ingredient is levonorgestrel, with each device containing 52 mg of levonorgestrel. The system's T-body also contains barium sulfate, making it radiopaque.

Uses

Mirena is primarily used for:

• Contraception: Preventing pregnancy for up to 8 years. It works by thickening cervical mucus, inhibiting sperm movement, and thinning the uterine lining.
• Treatment of Heavy Menstrual Bleeding (Menorrhagia): Approved for this use for up to 5 years in women who choose intrauterine contraception. It can significantly reduce menstrual blood loss and may lead to periods becoming lighter or stopping altogether.
• Protection from endometrial hyperplasia during estrogen replacement therapy.

Dosage and Administration

Mirena is an intrauterine device that is inserted into the uterus by a trained healthcare professional.

• For contraception, it is effective for up to 8 years.
• For the treatment of heavy menstrual bleeding, it is effective for up to 5 years.
• The device initially releases approximately 20-21 mcg of levonorgestrel per day, with the rate gradually decreasing over time.
• It can be inserted at any time during the menstrual cycle, provided pregnancy is reasonably ruled out. Backup contraception may be required for the first 7 days if not inserted within the first 7 days of the menstrual cycle.

Side Effects

Common Side Effects:

• Changes in menstrual bleeding patterns (irregular bleeding, spotting, lighter periods, or no periods).
• Headache or migraine.
• Acne.
• Breast soreness.
• Ovarian cysts (usually harmless).
• Abdominal or pelvic pain and cramping.
• Vaginal discharge or vulvovaginitis.

Serious Side Effects (Rare):

• Perforation of the uterus or cervix.
• Pelvic Inflammatory Disease (PID), particularly within the first few weeks after insertion.
• Ectopic pregnancy (if pregnancy occurs with Mirena in place, there is a higher likelihood it will be ectopic).
• Serious infection, including sepsis, following insertion.
• Expulsion of the device.

Precautions

• Contraindications: Mirena should not be used if pregnancy is suspected or confirmed, in cases of untreated pelvic or genital infections, certain cancers (breast, uterine, cervical), liver disease, or uterine anomalies that distort the cavity.
• Monitoring: Regular follow-up examinations (e.g., 4-6 weeks post-insertion, then yearly) are recommended to ensure correct placement and rule out complications.
• STI Protection: Mirena does not protect against HIV or other sexually transmitted infections (STIs).
• Pregnancy with Mirena: If pregnancy occurs, Mirena should be removed as it increases the risk of miscarriage, sepsis, and preterm labor.

Storage

Mirena is supplied in a sterile package and is typically stored by the healthcare provider. It should be stored at 25°C (77°F), with excursions permitted between 15-30°C (59-86°F). The package should not be opened until required for insertion.

MIRENA IUS (Intrauterine System) is a hormone-releasing intrauterine device manufactured by Bayer Zydus Pharma Pvt Ltd. It is a small, T-shaped plastic device that is inserted into the uterus.

Here are some frequently asked questions about Mirena IUS:

What is Mirena IUS used for?

Mirena IUS is primarily used for long-term birth control (contraception) and can prevent pregnancy for up to 8 years. It is also approved to treat heavy menstrual bleeding for up to 5 years in women who choose intrauterine contraception. Additionally, it can be used to protect the lining of the womb during menopause as part of hormone replacement therapy (HRT).

How does Mirena IUS work?

Mirena IUS works by slowly releasing a progestin hormone called levonorgestrel directly into the uterus. This hormone prevents pregnancy by several mechanisms: it thickens the cervical mucus, making it difficult for sperm to reach and fertilize an egg; it can inhibit sperm movement and survival; and it thins the lining of the uterus, making it less likely for a fertilized egg to implant.

What is the usual dosage?

Mirena IUS is a single device containing 52 mg of levonorgestrel. It is inserted into the uterus by a healthcare professional and continuously releases levonorgestrel. The release rate is approximately 21 mcg/day after 24 days, which gradually decreases to about 11 mcg/day after 5 years and 7 mcg/day after 8 years. For contraception, it is effective for up to 8 years, and for heavy menstrual bleeding, it is effective for up to 5 years.

What are the possible side effects?

Common side effects of Mirena IUS include changes in menstrual bleeding patterns (such as irregular bleeding, spotting, lighter periods, or even no periods), abdominal or pelvic pain, headache or migraine, and ovarian cysts. Some women may also experience pain, bleeding, or dizziness during and after insertion. Serious but rare side effects can include severe infection (like pelvic inflammatory disease, or PID), perforation of the uterus, and ectopic pregnancy.

Is it safe during pregnancy or breastfeeding?

Mirena IUS should not be used if you are pregnant or suspect you might be pregnant. If pregnancy occurs with Mirena in place, there is an increased risk of miscarriage, sepsis, and premature labor, and the device should be removed if possible.

Mirena can be used while breastfeeding. Small amounts of levonorgestrel may pass into breast milk, but it is not likely to affect the quality or amount of breast milk or the health of the nursing baby. However, the risk of uterine perforation may be higher if Mirena is inserted while breastfeeding or soon after childbirth.

Can it be taken with other medications?

Mirena IUS is not known to have significant drug interactions with most other medications because it acts locally within the uterus, and very little of the hormone reaches the rest of the body. However, it's always important to inform your healthcare provider about all prescription, over-the-counter medications, and supplements you are taking.

What precautions should be taken?

Mirena is not suitable for everyone. It should not be used if you have known or suspected pregnancy, a serious pelvic infection, certain cancers (like breast, uterine, or cervical cancer), liver disease, or unexplained vaginal bleeding. There is an increased risk of pelvic inflammatory disease (PID) within the first few weeks after insertion. Patients should regularly check for the device's threads to ensure it is in place. Mirena does not protect against sexually transmitted infections (STIs).

What happens if a dose is missed?

Mirena IUS is a long-acting device and does not involve daily dosing, so there is no concept of a "missed dose" in the traditional sense. If you suspect the device has moved or been expelled (e.g., if you cannot feel the threads), or if it has been in place beyond its recommended duration, you should contact your healthcare provider immediately and use a backup birth control method until it can be checked or replaced.

How should it be stored?

Mirena IUS is inserted by a healthcare provider in a medical setting and is not stored at home by the user. It is supplied in a sterile package and should be stored at 25°C (77°F), with excursions permitted between 15-30°C (59-86°F).