Using echinacea as a treatment for a cold during breastfeeding should not
cause a problem.  I have had several moms use it with great success.  I,
however, do not promote its use on a daily basis (as a "preventative") for
the breastfeeding or not.
Wishing you health and wellness!

Tami Karnes,                            One With Nature
Certified Herbalist                     P.O. Box 1724
Sedona, AZ                              Sedona, AZ  86339-1724
[log in to unmask]                       (800) 230-5166
   http://home.earthlink.net/~onewthnature/