If you are trying to build up your breastmilk supply, you might also want to consider fenugreek. It's an herb that you can by at GNC or any health food store. See
www.kellymom.com for proper dosing (btw...kellymom is a great resource for nursing moms).
I used fenugreek on and off while I was bf and it really helped out my supply. I had some supply problems when I went back to work full time and talked to a couple of different lactation consultants and La Leche League. They all gave a thumbs up to fenugreek. It is also one of the main ingredients in "nursing mother's tea" that you will also find at a health food store.
Good luck.