In: Drugs and Lactation Database (LactMed®) [Internet]. Bethesda (MD): National Institute of Child Health and Human Development; 2006.


No information is available on the clinical use of cobimetinib during breastfeeding. Because cobimetinib is 90% bound to plasma proteins, the amount in milk is likely to be low. However, its half-life is about 44 hours and it might accumulate in the infant. The manufacturer recommends that breastfeeding be discontinued during cobimetinib therapy and for 2 weeks after the last dose.

Publication types

  • Review