<prompt> How much iron a patient can tolerate at a time given intravenously :1000 mg2000 mg2500 mg3000 mg  <response>: Ans. is c i.e. 2500 mg Parenteral iron therapy : Impoant points : In patients on hemoperitioneal dialysis and in pregnant females with severe anemia, seen for the first time during last 8-10 weeks - parenteral iron is absolutely indicated. Rise in hemoglobin concentration after parenteral therapy is 0.7 to 1gm per week. Main advantage of parenteral therapy - ceainity of administration. 