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Mirena

RxNorm 804156· LEVONORGESTREL· INTRAUTERINE

Progestin [EPC], Progestin-containing Intrauterine System [EPC] · Bayer HealthCare Pharmaceuticals Inc.

Indications and usage

1 INDICATIONS AND USAGE Mirena is a progestin-containing intrauterine system (IUS) indicated for: • Prevention of pregnancy for up to 8 years ( 1.1 ) • Treatment of heavy menstrual bleeding for women who choose to use intrauterine contraception as their method of contraception for up to 5 years. ( 1.2 ) 1.1 Contraception Mirena is indicated for prevention of pregnancy for up to 8 years; replace after the end of the eighth year. 1.2 Heavy Menstrual Bleeding Mirena is indicated for the treatment of heavy menstrual bleeding for up to 5 years in women who choose to use intrauterine contraception as their method of contraception; replace after the end of the fifth year if continued treatment of heavy menstrual bleeding is needed.

Dosage and administration

2 DOSAGE AND ADMINISTRATION • Release rate of levonorgestrel (LNG) is 21 mcg/day after 24 days; this rate is reduced to about 11 mcg/day after 5 years and 7 mcg/day after 8 years. ( 2.1 ) • To be inserted by a trained healthcare provider using strict aseptic technique. Follow insertion instructions exactly as described. ( 2.2 ) • Patient should be re-examined and evaluated 4 to 6 weeks after insertion; then, yearly or more often if clinically indicated. ( 2.3 ) 2.1 Dosing Over Time Mirena contains 52 mg of levonorgestrel (LNG) released in vivo, at a rate of approximately 21 mcg/day after 24 days. This rate decreases progressively to approximately 11 mcg/day after 5 years and 7 mcg/day after 8 years. For contraception, remove Mirena by the end of the eighth year and replace at the time of removal with a new Mirena if continued use is desired. For treatment of heavy menstrual bleeding, replace Mirena by the end of the fifth year if continued use is needed because data on use in this indication beyond 5 years are limited. Mirena is supplied in a sterile package within an inserter that enables single-handed loading (see Figure 1). Do not open the package until required for insertion [see Description ( 11.2 )]. Do not use if the seal of the sterile package is broken or appears compromised. Use strict aseptic techniques throughout the insertion procedure [see Warnings and Precautions ( 5.3 )] . Mirena and Inserter 2.2 Insertion Instructions • Obtain a complete medical and social history to determine conditions that might influence the selection of a levonorgestrel-releasing intrauterine system (LNG IUS) for contraception . If indicated, perform a physical examination, and appropriate tests for any forms of genital or other sexually transmitted infections. [See Contraindications ( 4 ) and Warnings and Precautions ( 5.10 ).] Because irregular bleeding/spotting is common during the first months of Mirena use, exclude endometrial pathology (polyps or cancer) prior to the insertion of Mirena in women with persistent or uncharacteristic bleeding [see Warnings and Precautions ( 5.8 )]. • Follow the insertion instructions exactly as described to ensure proper placement and avoid premature release of Mirena from the inserter. Once released, Mirena cannot be re-loaded . • Check expiration date of Mirena prior to initiating insertion. • Mirena should be inserted by a trained healthcare provider. Healthcare providers should become thoroughly familiar with the insertion instructions before attempting insertion of Mirena. • Insertion may be associated with some pain and/or bleeding or vasovagal reactions (for example, syncope, bradycardia), or with seizure, especially in patients with a predisposition to these conditions. Consider administering analgesics prior to insertion. Timing of Insertion Table 1: When to Insert Mirena Starting Mirena in women not currently using hormonal or intrauterine contraception • Insert Mirena any time there is reasonable certainty that the woman is not pregnant. Consider the possibility of ovulation and conception prior to initiation of this product [see Contraindications (4)]. • If Mirena is inserted during the first seven days of the menstrual cycle or immediately after a first trimester abortion, back-up contraception is not needed. • If Mirena is not inserted during the first seven days of the menstrual cycle, a barrier method of contraception should be used, or the patient should abstain from vaginal intercourse for seven days to prevent pregnancy. Switching to Mirena from an oral, transdermal, or vaginal hormonal contraceptive • Insert Mirena at any time, including during the hormone-free interval of the previous method. • If inserted during active use of the previous method, continue that method for 7 days after Mirena insertion or until the end of the current treatment cycle. • If the woman was using continuous hormonal contraception, discontinue that method seven days after Mirena insertion. Switching to Mi…

Warnings

5 WARNINGS AND PRECAUTIONS • Remove Mirena if pregnancy occurs with Mirena in place. If pregnancy occurs, there is increased risk of ectopic pregnancy including loss of fertility, pregnancy loss, septic abortion (including septicemia, shock and death), and premature labor and delivery. ( 5.1 , 5.2 ) • Group A streptococcal infection has been reported following insertion of LNG IUS; strict aseptic technique is essential during insertion. ( 5.3 ) • Before using Mirena, consider the risks of PID. ( 5.4 ) • Uterine perforation may occur and may reduce contraceptive effectiveness or require surgery. Risk is increased if inserted in lactating women and may be increased if inserted in women with fixed retroverted uteri or postpartum. ( 5.5) • Partial or complete expulsion may occur, which can be unnoticed, leading to loss of contraceptive efficacy. ( 5.6 ) • Evaluate persistent enlarged ovarian follicles or ovarian cysts. ( 5.7 ) • Bleeding patterns become altered, may remain irregular and amenorrhea may ensue. ( 5.8 ) 5.1 Risk of Ectopic Pregnancy Evaluate women for ectopic pregnancy if they become pregnant with Mirena in place because the likelihood of a pregnancy being ectopic is increased with Mirena. Approximately one-half of pregnancies that occur with Mirena in place are likely to be ectopic. Also consider the possibility of ectopic pregnancy in the case of lower abdominal pain, especially in association with missed menses or if an amenorrheic woman starts bleeding. The incidence of ectopic pregnancy in clinical trials with Mirena, which excluded women with a history of ectopic pregnancy, was approximately 0.1% per year. The risk of ectopic pregnancy, in women who have a history of ectopic pregnancy and use Mirena is unknown. Women with a previous history of ectopic pregnancy, tubal surgery or pelvic infection carry a higher risk of ectopic pregnancy. Ectopic pregnancy may result in loss of fertility. 5.2 Risks with Intrauterine Pregnancy If pregnancy occurs while using Mirena, remove Mirena because leaving it in place may increase the risk of spontaneous abortion and preterm labor. Removal of Mirena or probing of the uterus may also result in spontaneous abortion. In the event of an intrauterine pregnancy with Mirena, consider the following: Septic abortion In patients becoming pregnant with an IUS in place, septic abortion - with septicemia, septic shock, and death - may occur. Continuation of pregnancy If a woman becomes pregnant with Mirena in place and if Mirena cannot be removed or the woman chooses not to have it removed, warn her that failure to remove Mirena increases the risk of miscarriage, sepsis, premature labor and premature delivery. Advise her of isolated reports of virilization of the female fetus following local exposure to LNG during pregnancy with an LNG IUS in place [see Use in Specific Populations ( 8.1 )]. Follow her pregnancy closely and advise her to report immediately any symptom that suggests complications of the pregnancy. 5.3 Sepsis Severe infection or sepsis, including Group A streptococcal sepsis (GAS), have been reported following insertion of Mirena. In some cases, severe pain occurred within hours of insertion followed by sepsis within days. Because death from GAS is more likely if treatment is delayed, it is important to be aware of these rare but serious infections. Aseptic technique during insertion of Mirena is essential in order to minimize serious infections such as GAS. 5.4 Pelvic Infection Promptly examine users with complaints of lower abdominal or pelvic pain, odorous discharge, unexplained bleeding, fever, genital lesions or sores. Remove Mirena in cases of recurrent endometritis or PID, or if an acute pelvic infection is severe or does not respond to treatment. Pelvic Inflammatory Disease (PID) Mirena is contraindicated in the presence of known or suspected PID or in women with a history of PID unless there has been a subsequent intrauterine pregnancy [see Contraindications ( 4 )].…

Contraindications

4 CONTRAINDICATIONS The use of Mirena is contraindicated when one or more of the following conditions exist: • Pregnancy or suspicion of pregnancy [see Warnings and Precautions ( 5.2 ), Use in Specific Populations ( 8.1 )] • For use as post-coital contraception (emergency contraception) • Congenital or acquired uterine anomaly including fibroids, that distorts the uterine cavity • Acute pelvic inflammatory disease (PID) or a history of PID unless there has been a subsequent intrauterine pregnancy [see Warnings and Precautions ( 5.4 )] • Postpartum endometritis or infected abortion in the past 3 months • Known or suspected uterine or cervical malignancy • Known or suspected breast cancer or other progestin-sensitive cancer, now or in the past • Uterine bleeding of unknown etiology • Untreated acute cervicitis or vaginitis, including bacterial vaginosis or other lower genital tract infections until infection is controlled • Acute liver disease or liver tumor (benign or malignant) • Conditions associated with increased susceptibility to pelvic infections [see Warnings and Precautions ( 5.4 )] • A previously inserted intrauterine device (IUD) that has not been removed • Hypersensitivity to any component of this product [see Adverse Reactions ( 6.2 ) and Description ( 11.1 )] • Pregnancy or suspicion of pregnancy. Cannot be used for post-coital contraception (emergency contraception) ( 4 ). • Congenital or acquired uterine anomaly if it distorts the uterine cavity ( 4 ) • Acute pelvic inflammatory disease (PID) or a history of PID unless there has been a subsequent intrauterine pregnancy ( 4 ) • Postpartum endometritis or infected abortion in the past 3 months ( 4 ) • Known or suspected uterine or cervical malignancy ( 4 ) • Known or suspected breast cancer or other progestin-sensitive cancer ( 4 ) • Uterine bleeding of unknown etiology ( 4 ) • Untreated acute cervicitis or vaginitis or other lower genital tract infections ( 4 ) • Acute liver disease or liver tumor (benign or malignant) ( 4 ) • Increased susceptibility to pelvic infection ( 4 ) • A previous intrauterine device (IUD) that has not been removed ( 4 ) • Hypersensitivity to any component of Mirena ( 4 )

Drug interactions

7 DRUG INTERACTIONS No drug-drug interaction studies have been conducted with Mirena. Drugs or herbal products that induce or inhibit LNG metabolizing enzymes, including CYP3A4, may decrease or increase, respectively, the serum concentrations of LNG during the use of Mirena. However, the contraceptive effect of Mirena is mediated via the direct release of LNG into the uterine cavity and is unlikely to be affected by drug interactions via enzyme induction or inhibition.

Pregnancy

8.1 Pregnancy Risk Summary The use of Mirena is contraindicated in pregnancy or with a suspected pregnancy and Mirena may cause adverse pregnancy outcomes [see Contraindications ( 4 ), Warnings and Precautions ( 5.1 , 5.2 )]. If a woman becomes pregnant with Mirena in place, the likelihood of ectopic pregnancy is increased and there is an increased risk of miscarriage, sepsis, premature labor, and premature delivery . Remove Mirena, if possible, if pregnancy occurs in a woman using Mirena. If Mirena cannot be removed, follow the pregnancy closely [see Warnings and Precautions ( 5.1 , 5.2 )] . There have been isolated cases of virilization of the external genitalia of the female fetus following local exposure to LNG during pregnancy with an LNG IUS in place.

Adverse events

Most frequently reported events (FDA FAERS). Report frequency does not imply causation.

  • device expulsion45,206
  • device dislocation20,189
  • menstruation irregular15,052
  • vaginal haemorrhage15,032
  • genital haemorrhage11,056
  • abdominal pain lower9,258
  • nausea8,842
  • abdominal pain8,659
  • procedural pain8,366
  • pain7,659
  • uterine perforation7,425
  • drug ineffective7,421
  • pelvic pain6,849
  • headache6,728
  • pregnancy with contraceptive device5,915
  • menstruation delayed5,776

Adverse reactions (label)

6 ADVERSE REACTIONS The following serious or otherwise important adverse reactions are discussed in elsewhere in the labeling: • Ectopic Pregnancy [see Warnings and Precautions ( 5.1 )] • Intrauterine Pregnancy [see Warnings and Precautions ( 5.2 )] • Group A Streptococcal Sepsis (GAS) [see Warnings and Precautions ( 5.3 )] • Pelvic Inflammatory Disease [see Warnings and Precautions ( 5.4 )] • Perforation [see Warnings and Precautions ( 5.5 )] • Expulsion [see Warnings and Precautions ( 5.6 )] • Ovarian Cysts [see Warnings and Precautions ( 5.7 )] • Bleeding Pattern Alterations [see Warnings and Precautions ( 5.8 )] The most common adverse reactions (≥10% users) are alterations of menstrual bleeding patterns, abdominal/pelvic pain, amenorrhea, headache/migraine, genital discharge, and vulvovaginitis. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Bayer HealthCare Pharmaceuticals Inc. at 1-888-842-2937 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in clinical practice. The data provided in Table 2 reflect the experience with the use of Mirena in the adequate and well-controlled studies as well as in the supportive and uncontrolled studies for contraception and heavy menstrual bleeding (n=5,091). The data cover more than 12,101 women-years of exposure up to 5 years of use, mainly in the contraception studies (11,761 women-years). The frequencies of reported adverse drug reactions represent crude incidences. The most common adverse reactions (≥10% users) are alterations of menstrual bleeding patterns [including unscheduled uterine bleeding (31.9%), decreased uterine bleeding (23.4%), increased scheduled uterine bleeding (11.9%), and female genital tract bleeding (3.5%)], abdominal/pelvic pain (22.6%), amenorrhea (18.4%), headache/migraine (16.3%), genital discharge (14.9%), and vulvovaginitis (10.5%). Adverse reactions reported in ≥ 5% of users are shown in Table 2. Table 2: Adverse Reactions ≥ 5% Reported in Clinical Trials with Mirena System Organ Class Adverse Reactions % (N= 5,091) Reproductive system and breast disorders alteration of menstrual bleeding pattern, including: unscheduled uterine bleeding decreased uterine bleeding increased scheduled uterine bleeding female genital tract bleeding 31.9 23.4 11.9 3.5 amenorrhea 18.4 genital discharge 14.9 vulvovaginitis 10.5 breast pain 8.5 benign ovarian cyst and associated complications 7.5 dysmenorrhea 6.4 Gastrointestinal disorders abdominal/pelvic pain 22.6 Nervous system disorders headache/migraine 16.3 Musculoskeletal and connective tissue disorders back pain 7.9 Skin and subcutaneous tissue disorders acne 6.8 Psychiatric disorders depression/depressive mood 6.4 Other adverse reactions occurring in <5% of subjects include alopecia, (partial and complete) device expulsion, hirsutism, nausea, and PID/endometritis. A separate study with 362 women who have used Mirena for more than 5 years showed a consistent adverse reaction profile in Years 6 through 8 as shown in Table 2. By the end of Year 8 of use, amenorrhea and infrequent bleeding are experienced by 34% and 26% of users, respectively; irregular bleeding occurs in 10%, frequent bleeding in 3%, and prolonged bleeding in 3% of users. In this study, 9% of women reported the adverse event of weight gain; it is unknown if the weight gain was caused by Mirena. 6.2 Postmarketing Experience Adverse Reactions from Postmarketing Spontaneous Reports The following adverse reactions have been identified during post approval use of Mirena. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure. • Arteri…