Is it safe to breast feed my child or should I stick to formula. Prednisone has a relatively short duration o action. It is out of your system within days. Therefore, it is safe to breastfeed and you will not be passing along the prednisone to your infant. Be aware that the immunomodulating agents such as beta-interferon is secreted in breast milk.
Current recommendations are against breastfeeding in women taking the interferons.
You are not going to be taking corticosteroids during the breastfeeding period and therefore it is safe. My sister in-law recently was diagnosed with MS during her 2nd pregnancy in her 2nd month. In a 4 day period she went numb from her toes to her neck. She received the diagnosis following her spinal tap. After 3 IVIg doses of SoluMedrol, she regained feeling from the abdomen down.