EPO or Procrit increases the number and size of the red blood cells. Works great for those patients who are anemic. In healthy individuals, it will thicken the blood. Thickened blood leads to poor circulation and stroke and MI. All AAS increase red blood cell number and thicken the blood. So, combining any AAS with Procrit/EPO is dangerous. I do not recommend the use of Procrit in healthy individuals unless the rewards far outweigh the risks (stroke, MI, etc).