If you are taking iron supplements, you may occasionally become constipated. A common side effect of iron supplementation, along with gas and bloating, the reasons for this symptom are not clear, but you can take other forms of iron that are less likely to have the same effect on you. Discuss supplements with your physician.
Ferrous Sulfate
Iron sulfate, also called ferrous sulfate, is the most commonly prescribed iron supplement for women who have a deficiency. The typical recommended dose is 325 milligrams, taken two or three times a day. Ferrous sulfate is the form of iron most often associated with constipation. If you are experiencing this problem, it can help to lower your total daily dose or switch to an alternative iron supplement, like ferrous gluconate.
Ferrous Gluconate
Ferrous gluconate, a different iron salt, contains less iron per milligram and is less likely to cause constipation. However, this form of iron contains about 57 percent the amount of iron compared to ferrous sulfate, which means you will likely have to take the supplement for a longer period of time. Liquid iron supplements are also available. Lowering your total dose of iron gradually should help you find a dose that does not cause you constipation.
Iron Polysaccharide
Iron polysaccharide is a product engineered to cause less constipation and nausea. It is available under various brand names, such as Niferex, Niferex Elixir, Ezfe, Ferrex-150, Nu-Iron 150 and Poly Iron. You should take it with vitamin C to boost iron absorption. Another alternative is slow-release iron. However, these supplements, while less constipating, may not be absorbed properly because they don't release their iron at the right area of the digestive tract.
Additional Information
Iron supplements are readily available without a prescription. They are typically recommended for iron deficiency that is associated with some forms of anemia or blood loss, such as occurs with heavy menstruation. Pregnancy also increases the need for iron. You should consult with your doctor about starting iron supplementation. However, if you do not have an iron deficiency, you really don't need extra supplementation and there would be no reason for you to take it.
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