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Drug Safety-related Labeling Changes (SrLC)

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REMERON SOLTAB (NDA-021208)

(MIRTAZAPINE)

Safety-related Labeling Changes Approved by FDA Center for Drug Evaluation and Research (CDER)

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04/29/2020 (SUPPL-24)

Approved Drug Label (PDF)

8 Use in Specific Populations

8.1 Pregnancy

(PLLR conversion)

Pregnancy Exposure Registry

There is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to antidepressants during pregnancy. Healthcare providers are encouraged to register patients by calling the National Pregnancy Registry for Antidepressants at 1-844-405-6185 or visiting online at https://womensmentalhealth.org/clinical-and-research-programs/pregnancyregistry/antidepressants/.

Risk Summary

Prolonged experience with mirtazapine in pregnant women, based on published observational studies and postmarketing reports, has not reliably identified a drug-associated risk of major birth defects, miscarriage or adverse maternal or fetal outcomes. There are risks associated with untreated depression in pregnancy (see Clinical Considerations).

 

In animal reproduction studies, oral administration of mirtazpine to pregnant rats and rabbits during the period of organogenesis revealed no evidence of teratogenic effects up to 20 and 17 times the maximum recommended human dose (MRHD) of 45 mg, respectively, based on mg/m2 body surface area.

However, in rats, there was an increase in postimplantation loss at 20 times the MRHD based on mg/m2 body surface area. Oral administration of mirtazapine to pregnant rats during pregnancy and lactation resulted in an increase in pup deaths and a decrease in pup birth weights at doses 20 times the MRHD based on mg/m2 body surface area (see Data).

 

The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. In the

U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2 to 4% and 15 to 20%, respectively.

Clinical Considerations

Disease-Associated Maternal and/or Embryo/Fetal Risk

Women who discontinue antidepressants during pregnancy are more likely to experience a relapse of major depression than women who continue antidepressants. This finding is from a prospective, longitudinal study that followed 201 pregnant women with a history of major depressive disorder who were euthymic and taking antidepressants at the beginning of pregnancy. Consider the risk of untreated depression when discontinuing or changing treatment with antidepressant medication during pregnancy and postpartum.

Data

Animal Data

Mirtazapine was administered orally to pregnant rats and rabbits during the period of organogenesis at doses of 2.5, 15, and 100 mg/kg/day and 2.5, 10, and 40 mg/kg/day, respectively, which are up to 20 and 17 times the maximum recommended human dose (MRHD) of 45 mg based on mg/m2 body surface area, respectively. No evidence of teratogenic effects was observed. However, in rats, there was an increase in postimplantation loss in dams treated with mirtazapine at 100 mg/kg/day which is 20 times the MRHD based on mg/m2 body surface area. Oral administration of mirtazapine at doses of 2.5, 15, and 100 mg/kg/day to pregnant rats during pregnancy and lactation resulted in an increase in pup deaths during the first 3 days of lactation and a decrease in pup birth weights at 20 times the MRHD based on mg/m2 body surface area. The cause of these deaths is not known. The no effect dose level is 3 times the

MRHD based on mg/m2 body surface area.

8.2 Lactation

(PLLR conversion)

Risk Summary

Data from published literature report the presence of mirtazapine in human milk at low levels with relative infant doses for mirtazapine ranging between 0.6 and 2.8% of the maternal weight-adjusted dose (see Data). No adverse effects on the breastfed infant have been reported in most cases of maternal use of mirtazapine. There are no data on the effects of mirtazapine on milk production.

 

The developmental and health benefits of breastfeeding should be considered along with the mother’s clinical need for mirtazapine and any potential adverse effects on the breastfed infant from mirtazapine or from the underlying maternal condition.

 

Data

In a published pooled analysis of 8 breastfeeding mother-infant pairs, the mean (min, max) total relative infant doses for mirtazapine and its desmethyl metabolite were 1.5% (0.6%, 2.8%) and 0.4% (0.1%, 0.7%) of the maternal weight-adjusted dose (median (min, max) dose of 38 mg (30 mg, 120 mg), respectively). No adverse drug effects were reported for any of the infants.

17 PCI/PI/MG (Patient Counseling Information/Patient Information/Medication Guide)

MEDICATION GUIDE

(additions underlined)

Before taking REMERON or REMERONSolTab, tell your healthcare provider about all your medical conditions, including if you:

 

  • are pregnant or plan to become pregnant. It is not known if REMERON and REMERONSolTab will harm your unborn baby.

    • Talk to your healthcare provider if you become pregnant or think you may be pregnant during treatment with REMERON and REMERONSolTab.

    • If you become pregnant while taking REMERON and REMERONSolTab, talk to your healthcare provider about registering with the National Pregnancy Registry for Antidepressants. You can register by calling 1- 844-405-6185 or visiting online at https://womensmentalhealth.org/clinical-and-research- programs/pregnancyregistry/antidepressants/. The purpose of this registry is to monitor the pregnancy outcomes in women who have been treated with REMERON and REMERONSolTab at any time during pregnancy.

       

PATIENT COUNSELING INFORMATION

(additions underlined)

Pregnancy

  • Advise patients to notify their physician if they become pregnant or intend to become pregnant during REMERON/REMERONSolTab therapy.

  • Advise patients that there is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to REMERON/REMERONSolTab during pregnancy.

 

Lactation

Advise patients to notify their physician if they are breastfeeding an infant.

04/29/2020 (SUPPL-26)

Approved Drug Label (PDF)

6 Adverse Reactions

6.2 Postmarketing Experience

(additions underlined)

Reproductive system and breast disorders: priapism

03/04/2020 (SUPPL-19)

Approved Drug Label (PDF)

Other

(PLR conversion; please refer to label)

09/05/2019 (SUPPL-25)

Approved Drug Label (PDF)

6 Adverse Reactions

(Additions and/or revisions are underlined)

Other Adverse Events Observed During Postmarketing Evaluation of REMERON

Adverse events reported since market introduction, which were temporally (but not necessarily causally) related to mirtazapine therapy, include cases of the ventricular arrhythmia Torsades de Pointes. In the majority of these cases, however, concomitant drugs were implicated.

Cases of severe skin reactions, including Stevens-Johnson syndrome, bullous dermatitis, erythema multiforme and toxic epidermal necrolysis have also been reported.

Increased creatine kinase blood levels and rhabdomyolysis have also been reported.

Hyperprolactinemia (and related symptoms, e.g., galactorrhea and gynecomastia) has been reported.

Somnambulism (ambulation and other complex behaviors out of bed) has been reported.

Other

Trade name “REMERONSolTab” was removed and replaced with “REMERON” throughout the entire label.