It is important to maintain an optimum level of Hb in chronic kidney disease patients as low Hb contributes to symptoms like weakness & fatigue. Inj erythropoitin is useful in improving Hb, however, at the same time it is important to evaluate & treat other causes of low Hb like Iron deficiency. I suggest you first to check for adequacy of iron stores in body before initiating Inj Wepox. Also it is important not to aim for high levels of Hb  (Hb>12.0) since research suggests complications associated with that.