A phase 3 trial has found oral ferric citrate to be effective in treating iron deficiency anemia in patients with chronic kidney disease. Other treatments for related conditions are also being studied, including low dose ferrous fumarate and iv iron dextran for iron-deficiency anemia. Ferric citrate has been approved to treat iron-deficiency anemia, although the specifics of its approval and the trial results are not entirely clear from the available information.