Answer
Yes, cefalexin passes into human breast milk; after a 500 mg dose, milk levels peaked at 4 micrograms/ml within 4 hours and disappeared by 8 hours, and caution is advised during breastfeeding.
Sources for this answer
- Cefalexin oral suspension BP 250mg/5mlSandoz Limited · emc · SmPC §4.6 Fertility, pregnancy and lactation · Version 7Document updated
Sources checked