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Drug Safety-related Labeling Changes (SrLC)

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BACTROBAN (NDA-050591)

(MUPIROCIN)

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

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05/08/2017 (SUPPL-34)

Approved Drug Label (PDF)

8 Use in Specific Populations

8.1 Pregnancy

(Pregnancy and Lactation Labeling Rule (PLLR) Conversion; additions and/or revisions are underlined)

Risk Summary

There are insufficient human data to establish whether there is a drug-associated risk with BACTROBAN ointment in pregnant women. Systemic absorption of mupirocin through intact human skin is minimal following topical administration of mupirocin ointment. No developmental toxicity was observed in rats or rabbits treated with mupirocin subcutaneously during organogenesis at doses of 160 or 40 mg per kg per day, respectively (22 and 11 times the human topical dose based on calculations of dose divided by the entire body surface area).

The estimated background risk of major birth defects and miscarriages for the indicated population is unknown. The estimated background risk in the U.S. general population of major birth defects is 2% to 4% and of miscarriage is 15% to 20% of clinically recognized pregnancies.

 

Data

Animal Data: Developmental toxicity studies have been performed with mupirocin administered subcutaneously to rats and rabbits at doses up to 160 mg per kg per day during organogenesis. This dose is 22 and 43 times, respectively, the human topical dose (approximately 60 mg mupirocin per day) based on calculations of dose divided by the entire body surface area. Maternal toxicity was observed (body weight loss/decreased body weight gain and reduced feeding) in both species with no evidence of developmental toxicity in rats. In rabbits, excessive maternal toxicity at the high dose precluded the evaluation of fetal outcomes. There was no developmental toxicity in rabbits at 40 mg per kg per day, 11 times the human topical dose based on calculations of dose divided by the entire body surface area.

Mupirocin administered subcutaneously to rats in a pre- and postnatal development study (dosed during late gestation through lactation) was associated with reduced offspring viability in the early postnatal period at a dose of 106.7 mg per kg, in the presence of injection site irritation and/or subcutaneous hemorrhaging. This dose is 14 times the human topical dose based on calculations of dose divided by the entire body surface area. The no-observed adverse effect level in this study was 44.2 mg per kg per day, which is 6 times the human topical dose.

8.2 Lactation

(Pregnancy and Lactation Labeling Rule (PLLR) Conversion; additions and/or revisions are underlined)

Risk Summary

It is not known whether mupirocin is present in human milk, has effects on the breastfed child, or has effects on milk production. However, breastfeeding is not expected to result in exposure of the child to the drug due to the minimal systemic absorption of mupirocin in humans following topical administration of BACTROBAN ointment. The developmental and health benefits of breastfeeding should be considered along with the mother’s clinical need for BACTROBAN ointment and any potential adverse effects on the breastfed child from BACTROBAN ointment or from the underlying maternal condition.

 

Clinical Considerations

To minimize oral exposure of the drug to children, a breast and/or nipple being treated with BACTROBAN ointment should be thoroughly washed prior to breastfeeding.

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

PATIENT INFORMATION

(Additions and/or revisions are underlined)

How should I use BACTROBAN ointment?

  • If you are breastfeeding and use BACTROBAN ointment on your breast or nipple, wash the area well before breastfeeding your child.