Your doctor will probably have you take iron supplement pills and eat foods rich in iron to treat your anemia. Most people begin to feel better after a few days of taking iron pills. But do not stop taking the pills even if you feel better.o not take iron pills on your own without seeing your doctor first. If you take iron pills without talking with your doctor first, the pills may cause you to have too much iron in your blood, or even iron poisoning. Your low iron level may be caused by a serious problem, such as a bleeding ulcer or colon cancer.