− if you are allergic (hypersensitive) to erythropoietins or any of the other ingredients of Retacrit − if you have developed Pure Red Cell Aplasia (PRCA; reduced or stopped production of red blood cells) following treatment with any erythropoietin − if you have high blood pressure, which is not properly controlled with blood pressure-lowering medicines − if you cannot be given medicines to thin blood for the prevention of blood clots − if you are donating your own blood before surgery, and: