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Slow-release iron

Brand name: Feosol for ferrous sulfate. Other brands include ferosul and Fe-Vite Drops.
Drug class: iron products

What is Slow-Release Iron (SRI)?

Slow Release Iron is one type of iron. Iron is normally obtained from food. Iron plays an essential role in carrying oxygen throughout your body's organs and tissues. It also helps muscle cells store oxygen.

Iron deficiency is treated with slow-release iron. Slow-release iron can be used in other ways not mentioned in this guide.

Side effects of Slow-release iron

If you notice any of the following symptoms of an allergic reaction: hives, difficulty breathing and swelling of lips, face or throat. Seek medical help immediately.

Slow-release iron can cause serious side effects. If you experience:

  • Severe stomach pain or nausea
  • A cough that contains bloody mucus or vomit that resembles coffee grounds
  • Bloody or tarry stool.

Side effects of slow-release iron include:

  • Diarrhea, constipation;
  • Nausea, stomach pain;
  • Green-coloured stools
  • Loss of appetite

There may be other side effects. For medical advice on side effects, call your doctor. The FDA can be contacted at 1-800-FDA-1088 to report side effects.


Do not use it other than as directed. Inform your doctor of any other medications you are taking or if you have allergies or other medical conditions.

What should I talk about before taking slow-release iron?

Have You Experienced Any of These?:

  • Iron overload syndrome
  • A disorder of the red blood cells, such as thalassemia
  • A condition that requires regular blood transfusions.

Consult your doctor before taking this medication if you're pregnant or nursing. Don't give slow-release iron without consulting a doctor.

How to take Slow-release iron?

Follow the instructions on the label or those prescribed by your doctor. Do not eat for at least an hour or two hours before you take the pill. Measuring liquid medicine is important. Use the provided dosing device or a dose-measuring tool (not a spoon). Do not chew or crush the tablet.

Follow your doctor or dietitian's instructions regarding diet to stay healthy. Find out which foods you should avoid or eat. Store away from heat and moisture at room temperature.

What happens if I miss the dose?

If it is almost time for your next dose, skip the one you missed and wait. Never take two doses of the same medicine at once.

What happens if I overdose?

Call the Poison Help Line at 1-800-222-1222 or seek emergency medical care. If a child accidentally swallows a tablet, call 911. A child can die from an iron overdose. Overdose symptoms include nausea, vomiting, bleeding, diarrhea, dry skin, and muscle cramps.

What should be avoided?

Avoid taking any other iron supplements. Take any vitamins or minerals only after consulting your doctor or pharmacist.

Interaction with other drug

Slow Release Iron should be taken 2 to 6 hours prior to or after any of the following medications:

  • An antacid;
  • Anti-microbial
  • A laxative.

This list is incomplete. Slow-release iron may be affected by other drugs, such as vitamins and herbs. This list does not include all possible drug interactions.