Know the basics
What is ferrous fumarate used for?
Ferrous fumarate is an iron supplement used to treat or prevent low blood levels of iron (e.g., for anemia or during pregnancy). Iron is an important mineral that the body needs to produce red blood cells and keep you in good health.
How should I take ferrous fumarate?
Iron is best absorbed on an empty stomach (usually if taken 1 hour before or 2 hours after meals). If stomach upset occurs, you may take ferrous fumarate with food. See the instructions below for the liquid drops for infants/children. Avoid taking antacids, dairy products, tea, or coffee within 2 hours before or after ferrous fumarate because they will decrease its effectiveness.
Take tablets or capsules with a full glass of water (8 ounces or 240 millilitres) unless otherwise directed by your doctor. Do not lie down for 10 minutes after taking your tablet or capsule dose.
Swallow extended-release capsules whole. Do not crush or chew extended-release capsules or tablets. Doing so can release all of the drug at once, increasing the risk of side effects. Also, do not split extended-release tablets unless they have a score line and your doctor or pharmacist tells you to do so. Swallow the whole or split tablet without crushing or chewing.
If you are taking chewable tablets, chew the Ferrous fumarate thoroughly, then swallow.
If you are taking a liquid suspension form of ferrous fumarate, shake the bottle well before each dose.
If you are taking the liquid form for adults, carefully measure the dose using a special measuring device/spoon. Do not use a household spoon because you may not get the correct dose. Mix the dose in a glass of water or juice, and drink the mixture through a straw to prevent staining the teeth.
If you are giving the liquid drops into an infant or child, use the dropper provided to carefully measure the dose. The dose may be placed directly into the mouth (towards the back of the tongue) or it may be mixed in formula (not milk), fruit juice, cereal, or other food as directed to increase your child’s acceptance. It is best to give ferrous fumarate right after a meal. Follow the directions on the product package for the brand that you use.
Take ferrous fumarate regularly in order to get the most benefit from it. To help you remember, take it at the same time(s) each day.
How do I store ferrous fumarate?
Ferrous fumarate is best stored at room temperature away from direct light and moisture. To prevent drug damage, you should not store ferrous fumarate in the bathroom or the freezer. There may be different brands of Ferrous fumarate that may have different storage needs. It is important to always check the product package for instructions on storage, or ask your pharmacist. For safety, you should keep all medicines away from children and pets.
You should not flush ferrous fumarate down the toilet or pour them into a drain unless instructed to do so. It is important to properly discard this product when it is expired or no longer needed. Consult your pharmacist for more details about how to safely discard your product.
Know the precautions & warnings
What should I know before using ferrous fumarate?
You should not use ferrous fumarate if you are allergic to it, or if you have: iron overload syndrome; anemia (a lack of red blood cells); or thalassemia (a genetic disorder of red blood cells).
Is it safe to take ferrous fumarate during pregnancy or breast-feeding?
There isn’t enough information about the safety of using ferrous fumarate during pregnancy and breast-feeding. Please always consult with your doctor to weigh the potential benefits and risks before taking ferrous fumarate.
Know the side effects
What are the side effects of ferrous fumarate?
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have: bright red blood in your stools; or pain in your chest or throat when swallowing a ferrous fumarate tablet.
Common side effects may include: constipation, diarrhea; nausea, vomiting, heartburn; loss of appetite; or black or dark-colored stools or urine.
Not everyone experiences these side effects. There may be some side effects not listed above. If you have any concerns about a side-effect, please consult your doctor or pharmacist.
Know the interactions
What drugs may interact with ferrous fumarate?
Ferrous fumarate may interact with other drugs that you are currently taking, which can change how your drug works or increase your risk for serious side effects. To avoid any potential drug interactions, you should keep a list of all the drugs you are using (including prescription drugs, nonprescription drugs and herbal products) and share it with your doctor and pharmacist. For your safety, do not start, stop, or change the dosage of any drugs without your doctor’s approval.
Using dietary supplements in this class with any of the following medicines is usually not recommended, but may be required in some cases: Altretamine, Amygdalin, Dabrafenib, Deferoxamine, Digoxin, Eltrombopag, Elvitegravir, Ketoconazole, Ledipasvir, Pazopanib, Phenytoin, Rilpivirine, Vismodegib.
If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.
Does food or alcohol interact with ferrous fumarate?
Ferrous fumarate may interact with food or alcohol by altering the way the drug works or increase the risk for serious side effects. Please discuss with your doctor or pharmacist any potential food or alcohol interactions before using this drug.
What health conditions may interact with ferrous fumarate?
Ferrous fumarate may interact with your health condition. This interaction may worsen your health condition or alter the way the drug works. It is important to always let your doctor and pharmacist know all the health conditions you currently have.
The presence of other medical problems may affect the use of dietary supplements in this class. Make sure you tell your doctor if you have any other medical problems, especially:
- Alcohol abuse (or history of);
- Blood transfusions (with high red blood cell iron content);
- Kidney infection;
- Liver disease;
- Porphyria cutaneous tarda—Higher blood levels of the iron supplement may occur, which may increase the chance of side effects;
- Arthritis (rheumatoid) ;
- Asthma or allergies or
- Heart disease—The injected form of iron may make these conditions worse;
- Colitis or other intestinal problems :
- Iron overload conditions (e.g., hemochromatosis, hemosiderosis, hemoglobinopathies):
- Stomach ulcer—Iron supplements may make these conditions worse.
- Other anemias—Iron supplements may increase iron to toxic levels in anemias not associated with iron deficiency.
Understand the dosage
The information provided is not a substitute for any medical advice. You should ALWAYS consult with your doctor or pharmacist before using ferrous fumarate.
What is the dose of ferrous fumarate for an adult?
Usual Adult Dose for Iron Deficiency Anemia
- Initial: 325 mg orally once a day.
- Maintenance: 325 mg orally 3 times a day. Resolution of iron deficiency anemia may require ferrous fumarate supplementation for several weeks or months, depending on the duration and severity of the anemia.
Usual Adult Dose for Anemia Associated with Chronic Renal Failure
- Initial: 325 mg orally once a day.
- Maintenance: 325 mg orally 3 times a day.
In patients with chronic renal failure, iron status should be evaluated if epoetin alfa therapy is initiated.
A transferrin saturation of less than 20%, or a serum ferritin level of less than 100 mcg/L suggests inadequate iron stores and a need for iron replacement therapy.
Continued iron replacement therapy is needed in most patients receiving epoetin alfa treatment.
Usual Adult Dose for Vitamin/Mineral Supplementation during Pregnancy/Lactation: 325 mg orally once a day. The CDC has defined anemia during pregnancy as a hemoglobin concentration less than 100 g/L during the first and third trimesters and less than 105 g/L during the second trimester or a hematocrit value of less than 32%. The recommended daily allowance (RDA) of elemental iron is 30 mg orally during pregnancy and 15 mg orally during lactation.
Usual Adult Dose for Vitamin/Mineral Supplementation: 325 mg orally once a day. The recommended daily allowance (RDA) of elemental iron is 10 mg for adult males, 15 mg for adult, premenopausal women, and 10 mg for postmenopausal women.
What is the dose of Ferrous fumarate for a child?
Usual Pediatric Dose for Iron Deficiency Anemia
- Premature neonates: 2 to 4 mg elemental iron/kg/day divided every 12 to 24 hours (maximum daily dose = 15 mg).
- Infants and children <12 years:
- prophylaxis: 1 to 2 mg elemental iron/kg/day (maximum 15 mg) in 1 to 2 divided doses;
- mild to moderate iron deficiency anemia: 3 mg elemental iron/kg/day in 1 to 2 divided doses;
- severe iron deficiency anemia: 4 to 6 mg elemental iron/kg/day in 3 divided doses;
How is Ferrous fumarate available?
Ferrous fumarate is available in the following dosage forms and strengths: Tablet, Oral: 29 mg, 90mg, 150 mg, 324 mg, 325 mg
What should I do in case of an emergency or overdose?
In case of an emergency or an overdose, call your local emergency services or go to your nearest emergency room.
What should I do if I miss a dose?
If you miss a dose of Ferrous fumarate, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and take your regular dose as scheduled. Do not take a double dose.
Hello Health Group does not provide medical advice, diagnosis or treatment.
Iron Supplement (Oral Route, Parenteral Route). http://www.webmd.com/drugs/search.aspx?stype=drug&source=1&query=Ferrous+fumarate. Accessed June 22,2016.
Ferrous fumarate. https://www.drugs.com/mtm/ferrous-fumarate.html. Accessed June 22,2016.
Iron Supplement (Oral Route, Parenteral Route). https://www.drugs.com/mtm/ferrous-fumarate.html. Accessed June 22,2016.
Review Date: May 30, 2016 | Last Modified: January 4, 2017