Your doctor will check on this. – Vascular and thrombotic events (blood clotting) in blood vessels, such as disturbed blood perfusion of the heart, heart attack, cerebral haemorrhages, stroke, temporary disturbance of blood perfusion in the brain, deep vein thrombosis, arterial thrombosis, pulmonary embolism, dilatation of the wall of a blood vessel (aneurysm), retinal thrombosis, and blood clot in an artificial kidney have been reported in patients receiving erythropoietin treatment. – Hypersensitivity reactions have been reported in rare cases, including swelling, mainly in the region of the eyelids and the lips (Quincke's oedema) and shock-like allergic reactions with symptoms of tingling, reddening, itching, hot flush and accelerated pulse. – Pure red cell aplasia (PRCA) has been very rarely reported in patients after months to years of subcutaneous (injection under the skin) erythropoietin treatment.