hi.. your mother is sufferring from chronic kidney failure secondary to diabetes and hypertension. Espogen is erythropoetin hormone that is normally secreated by kidney and promotes hemoglobin synthesis that is blood formation. in condition of kidney failure natural production of this hormone is decreased and we have to supplement it from outside.. usually it is quite safe except some local redness at injection site, muscle pain or joint pain that subsides gradually, uncommonly sometimes there is severe breathing problem, bronchospasm or low bp in that case immediate physician consultation is required but uncommon with new molecules which are prepared by recommbitant technology