A 43-year-old male patient undergoing treatment for peptic ulcer complains of weakness, dizziness, coffee-ground vomiting, melena. After administration of haemostatics the patient's condition has not improved, fresh blood has shown up in the vomit, skin bruises of different sizes have appeared. In blood: thrombocytes -50 × 109/l, Lee-White clotting time - 35 minutes, APTT - 80 seconds. In this case it is most rational to administer the following preparation: