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Permethrin use while Breastfeeding

Drugs containing Permethrin: Elimite, Nix, Quellada Scabies Treatment, RID Home Lice Control Spray for Surfaces, Lyclear, Nix Complete Lice Treatment System, Nix Cream Rinse, Ravine Anti-Lice Medicated Treatment, Nix Lice Control, Acticin, Show all 19 »Lice Solution, RID Complete Kit, Complete Lice Treatment Kit, Orange Medic Head Lice Treatment, Lice Bedding Spray, Pyrifoam Lice Breaker, Orange Medic Plus Head Lice Treatment, Quellada Head Lice Treatment for Short Hair, Quellada Head Lice Treatment

Permethrin Levels and Effects while Breastfeeding

Summary of Use during Lactation

Because less than 2% is absorbed after topical application, rapid metabolism to inactive metabolites and safe application directly on infants' skin, topical permethrin products are acceptable in nursing mothers.[1][2][3] This combination is recommended by the Centers for Disease Control and Prevention for the treatment of lice infestations during lactation.[3] Extensive exposure, such as from agricultural use or malaria control might have long-term health concerns because residues can be found in breastmilk.[4] Only water-miscible cream, gel or liquid products should be applied to the breast because ointments may expose the infant to high levels of mineral paraffins via licking.[5]

Drug Levels

Maternal Levels. Permethrin was measured in 53 breastmilk samples from 29 mothers collected 1998 to 1999 in Basel Switzerland. Permethrin was detected in 25 milk samples, even in mothers from households that reported no permethrin use. The average permethrin concentration was 74 mcg/kg of fat (range undetectable [<60 mcg/kg] to 152 mcg/kg fat).[6]

Permethrin was found in the breastmilk of nursing mothers in 3 South African towns. Average levels in breastmilk ranged from 8.3 to 48.4 mcg/L in the 3 towns. The source was thought to be from a dusting powder widely available and used in gardening. The dosage and route of exposure (i.e., topical, inhalation, oral) could not be determined. All milk levels were below the allowable daily limit for permethrin.[7][8]

Samples of mature milk were collected in 2002 from 22 mothers in Mozambique where pyrethrins were used for mosquito control in the thatching of homes from 1993 to 2000 and continued to be used in bed netting after this period. The average permethrin concentration in the milk samples was 79 mcg/kg of lipid; the median concentration was 55 mcg/kg of lipid (range 10 to 230 mcg/kg of lipid). The milk permethrin levels in all mothers were below the allowable daily limit for permethrin.[9]

Breastmilk samples from mothers in Brazil, Colombia and Spain were analyzed for pyrethroids. Permethrin was detected in all samples, regardless of reported household usage. Samples from rural Brazil (n = 9) contained a mean permethrin concentration of 3.57 ng/gram of lipid. Samples from Sao Paulo (n = 8) contained a mean permethrin concentration of 0.36 ng/gram of lipid. Samples from Santiago de Cali, Colombia (n = 27) contained a mean permethrin concentration of 0.91 ng/gram of lipid. Samples from Barcelona, Spain (n = 6) contained a mean permethrin concentration of 2.2 ng/gram of lipid. Other pyrethroids were also detected, but estimated daily intakes by breastfed infants were all below acceptable daily intake limits.[10]

Infant Levels. Relevant published information was not found as of the revision date.

Effects in Breastfed Infants

In a telephone follow-up study, 5 mothers who used permethrin during breastfeeding reported no adverse reactions in their breastfed infants.[11]

Effects on Lactation and Breastmilk

Relevant published information was not found as of the revision date.

Alternate Drugs to Consider

Pyrethrins

References

1. Porto I. Antiparasitic drugs and lactation: focus on anthelmintics, scabicides, and pediculicides. J Hum Lact. 2003;19:421-5. PMID: 14620457

2. Leachman SA, Reed BR. The use of dermatologic drugs in pregnancy and lactation. Dermatol Clin. 2006;24:167-97. PMID: 16677965

3. Workowski KA, Berman S. Sexually transmitted diseases treatment guidelines, 2010. MMWR Recomm Rep. 2010;59 (RR-12):1-110. PMID: 21160459

4. Bouwman H, Kylin H. Malaria control insecticide residues in breast milk: the need to consider infant health risks. Environ Health Perspect. 2009;117:1477-80. PMID: 20019894

5. Noti A, Grob K, Biedermann M et al. Exposure of babies to C(15)-C(45) mineral paraffins from human milk and breast salves. Regul Toxicol Pharmacol. 2003;38:317-25. PMID: 14623482

6. Zehringer M , Herrmann A. Analysis of polychlorinated biphenyls, pyrethroid insecticides and fragrances in human milk using a laminar cup liner in the GC injector. Eur Food Res Technol. 2001;212:247-51.

7. Sereda B, Bouwman H, Kylin H. Comparing water, bovine milk, and indoor residual spraying as possible sources of DDT and pyrethroid residues in breast milk. J Toxicol Environ Health A. 2009;72:842-51. PMID: 19557612

8. Bouwman H, Sereda B, Meinhardt HM. Simultaneous presence of DDT and pyrethroid residues in human breast milk from a malaria endemic area in South Africa. Environ Pollut. 2006;144:902-17. PMID: 16564119

9. Feo ML, Eljarrat E, Manaca MN et al. Pyrethroid use-malaria control and individual applications by households for other pests and home garden use. Environ Int. 2012;38:67-72. PMID: 21982035

10. Corcellas C, Feo ML, Torres JP et al. Pyrethroids in human breast milk: Occurrence and nursing daily intake estimation. Environ Int. 2012;47:17-22. PMID: 22717642

11. Ito S, Blajchman A, Stephenson M et al. Prospective follow-up of adverse reactions in breast-fed infants exposed to maternal medication. Am J Obstet Gynecol. 1993;168:1393-9. PMID: 8498418

Permethrin Identification

Substance Name

Permethrin

CAS Registry Number

52645-53-1

Drug Class

Antiinfective Agents

Antiparasitic Agents

Insecticides

Administrative Information

LactMed Record Number

505

Last Revision Date

20140116

Disclaimer

Information presented in this database is not meant as a substitute for professional judgment. You should consult your healthcare provider for breastfeeding advice related to your particular situation. The U.S. government does not warrant or assume any liability or responsibility for the accuracy or completeness of the information on this Site.

Disclaimer: This information is not intended as a substitute for professional judgment. You should consult your healthcare provider for breastfeeding advice related to your particular situation. Use of this website signifies your agreement to the Terms of Use and Online Privacy Policy.

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