Iron infusion is given to treat anemia due to iron deficiency. So, you can use these infusions if your anemia is due to iron deficiency. You can not use iron infusions for other than this anemia. Remember, If you are allergic to iron, or have liver disease, rheumatoid arthritis and inflammatory diseases then you can not use it. Visible improvement will be after 2-3 weeks. Iron Supplements can cause anaphylactoid reactions.