The combination of erythropoietin and calcium, with or without phosphates, is useful for treating haemochromatoses. A method for treating primary haemochromatoses in a patient involves administering to the patient a combination therapy including an erythropoietin preparation and a calcium preparation, where the erythropoietin preparation and the calcium preparation are each administered from 1 to 5 times weekly. Beneficially, this combination therapy further administers a phosphorus preparation.