Illness or Medication and Breastfeeding
La Leche League - My doctor has prescribed a medication for me. Is it safe for me to continue breastfeeding?
http://www.llli.org/FAQ/medications.html
Abstract
This brief FAQ provides a general answer to a question about whether medication for a mother is safe for a baby. Breastfeeding women and staff providing support can read this before contacting the mother's health care provider.