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Everolimus use while Breastfeeding

Medically reviewed by Last updated on Jan 13, 2024.

Drugs containing Everolimus: Afinitor, Zortress, Afinitor Disperz

Everolimus Levels and Effects while Breastfeeding

Summary of Use during Lactation

In two women, everolimus was either undetectable or detectable in very small amounts in the colostrum. However, no information is available on the use of everolimus during breastfeeding. An alternate drug may be preferred, especially while nursing a newborn or preterm infant.

Drug Levels

Maternal Levels. A woman was receiving everolimus 2 mg daily and cyclosporine 1.5 mg/kg daily during pregnancy and postpartum following a heart transplant. Although she did not breastfeed, a colostrum sample was obtained one day postpartum which contained undetectable everolimus levels (<0.5 mcg/L). The timing of the sample with respect to the previous everolimus dose was not stated. Measurement of serial plasma levels of everolimus obtained transplacentally found the estimated elimination half-life of everolimus to be about 86 hours in the newborn.[1]

A woman with a kidney transplant received azathioprine 125 mg, methylprednisolone 12 mg, and everolimus 0.5 mg daily during pregnancy and postpartum. On the second day postpartum, 6 colostrum samples were collected. The pre-dose level was 33 ng/L. The highest level was 66 ng/L at 4 hours after the dose. Samples taken at 2, 6, 8 and 12 hours after the dose contained concentrations that ranged from 45 to 51 ng/L.[2]

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

Effects in Breastfed Infants

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

Effects on Lactation and Breastmilk

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

Alternate Drugs to Consider

Azathioprine, Cyclosporine, Tacrolimus


Fiocchi R, D'Elia E, Vittori C, et al. First report of a successful pregnancy in an everolimus-treated heart-transplanted patient: Neonatal disappearance of immunosuppressive drugs. Am J Transplant 2016;16:1319-22. [PubMed: 26555407]
Kociszewska-Najman B, Szpotanska-Sikorska M, Mazanowska N, et al. Transfer of everolimus into colostrum of a kidney transplant mother. Ann Transplant 2017;22:755-8. [PMC free article: PMC6248263] [PubMed: 29255138]

Substance Identification

Substance Name


CAS Registry Number


Drug Class

Breast Feeding


Milk, Human

Immunosuppressive Agents

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Further information

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