Also - if you donate peripheral blood stem cells, you won't take an erythropoetin compound (EPO) (something like Procrit, which stimulates red blood cell formation), you will take neupogen, which is a different compound acting in the blood system. It mobilizes peripheral blood progenitor cells. Don't quote me, but I don't think neupogen is banned, but I just did a cursory look at WADA's list of agents and didn't see it on there.

OK, I just did a little search and every marrow donation site refers to neupogen use, but in 2007 the FDA labeled the drug to NOT be used in healthy subjects donating marrow due to some risks involved with its use in this setting. It looks like the label approved in Sept of 07 says that this is not an approved use of the drug. So not sure if it is still being used in this setting or not.