Taking iron tablets can cause constipation. Iron supplements are one of the common causes of stomach upset, dark colored stools, constipation, and diarrhea.
Your doctor may prescribe Iron supplements if you have low iron levels or anemia. In some countries, iron tablets are routinely given to pregnant mothers. A recent study found giving iron pills to blood donors may be beneficial for them. So, the number of people who take Iron pills have been increasing.
Gastrointestinal symptoms are the main side effects reported by these people. Constipation is the most troublesome adverse effect that many people want to avoid.
Iron supplements come in various forms such as enteric coated tablets, liquid, and injection. The active component of these preparations also varies.
The common forms of active ingredients are:
- Ferrous sulphate
- Ferrous gluconate
- Ferrous fumarate
- Iron-Dextran (in injection or infusion)
Only oral iron preparations cause bowel problems. Any iron component in oral supplements can make you constipated. However, Ferrous sulphate is appeared to be more constipating. People taking this particular preparation often complain difficulty in bowel movements due to hard stools.
Changing the preparation may help in some people. If not, you may see your doctor about getting iron injections.
You can take the tablets with or after meals to reduce the gastrointestinal side effects. However, some foods reduce the absorption of iron. So, if you take the pills with food, you may not get enough iron.
Related: Red meat contains large amounts of iron. Eating too much red meat can cause constipation.
How to avoid constipation when taking iron tablets
- Take the tablets with plenty of water.
- Spread the dose. If you take three tablets a day, take one tablet three times a day. That means one tablet after each main meal.
- Avoid other medications that can cause constipation such as calcium tablets.
- You can take a stool softener with the advice of your doctor or pharmacist.
- Eat plenty of fruits and vegetables.
Bottom line:
You may need to take iron tablets if you have iron deficiency anemia. They can cause constipation and other side effects.
Iron deficiency can be due to some serious medical conditions such as coeliac disease, Inflammatory bowel disease, and bowel cancer. So, consult your doctor if you have any symptoms.