Iron supplements - oral
ferrous sulfate, dried ER 159 mg (45 mg iron) tablet,extended release
Accidental overdose of iron-containing products is a leading cause of fatal poisoning in children younger than 6 years. Keep this product out of reach of children. If overdose does occur, get medical help right away or call a poison control center.
This medication is an iron supplement used to treat or prevent low blood levels of iron (such as those caused by anemia or pregnancy). Iron is an important mineral that the body needs to produce red blood cells and keep you in good health.
Follow all directions on the product package, or take as directed by your doctor. Do not take more than the recommended dosage. If you have any questions, ask your doctor or pharmacist.
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 this medication 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 this medication because they will decrease its effectiveness.
Take tablets or capsules with a full glass of water (8 ounces or 240 milliliters) unless otherwise directed by your doctor. Do not lie down for at least 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 medication thoroughly, then swallow.
If you are taking a liquid suspension form of this medication, 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 to 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 this medication right after a meal. Follow the directions on the product package for the brand that you use.
Take this medication regularly in order to get the most benefit from it. To help you remember, take it at the same time(s) each day.
Constipation, diarrhea, stomach cramps, or upset stomach may occur. These effects are usually temporary and may disappear as your body adjusts to this medication. If any of these effects last or get worse, contact your doctor or pharmacist promptly.
Iron may cause your stools to turn black, an effect that is not harmful.
If your doctor has prescribed this medication, remember that your doctor has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including:
- itching/swelling (especially of the face/tongue/throat)
- severe dizziness
- trouble breathing
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
In the US -
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
Before taking this medication, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before taking this medication, tell your doctor or pharmacist your medical history, especially of:
- iron overload disorder (such as hemochromatosis, hemosiderosis)
- use/abuse of alcohol
- liver problems
- stomach/intestinal problems (such as ulcer, colitis)
If your brand of iron supplement also contains folic acid, be sure to tell your doctor or pharmacist if you have vitamin B12 deficiency (pernicious anemia) before taking it. Folic acid may falsely improve certain lab tests for vitamin B12 deficiency without actually treating this anemia. Untreated vitamin B12 deficiency may result in serious nerve problems (for example, peripheral neuropathy symptoms such as numbness/pain/tingling sensations). Consult your doctor or pharmacist for details.
Chewable tablets of this medicine may contain aspartame. If you have phenylketonuria (PKU) or any other condition that requires you to restrict your intake of aspartame (or phenylalanine), consult your doctor or pharmacist about using this drug safely.
Liquid preparations of this product may contain sugar and/or alcohol. Caution is advised if you have diabetes, alcohol dependence, or liver disease. Ask your doctor or pharmacist about using this product safely.
During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor.
This medication passes into breast milk. Consult your doctor before breast-feeding.
Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.
This product can decrease the absorption of other drugs such as bisphosphonates (for example, alendronate), levodopa, penicillamine, quinolone antibiotics (for example, ciprofloxacin, levofloxacin), thyroid medications (for example, levothyroxine), and tetracycline antibiotics (for example, doxycycline, minocycline). Separate your doses of these medications as far as possible from your doses of this product. Ask your doctor or pharmacist about how long you should wait between doses and for help finding a dosing schedule that will work with all your medications.
Avoid taking this medication at the same time as antacids. Wait at least 2 hours between taking this medication and an antacid.
If your brand of iron also contains folic acid, be sure to tell your doctor or pharmacist if you take certain anti-seizure drugs (for example, hydantoins such as phenytoin).
This medication may interfere with certain lab tests (such as fecal occult blood tests), possibly causing false test results. Make sure lab personnel and all your doctors know you use this drug.
If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center. Symptoms of overdose may include: stomach pain, nausea, vomiting, diarrhea.
If your doctor has prescribed this medication, do not share it with others.
Lab and/or medical tests (such as complete blood count) may be done while you are taking this product. Keep all medical and lab appointments. Consult your doctor for more details.
This medication is not a substitute for a proper diet. It is important to maintain a well-balanced diet. Foods rich in iron include red meats (especially liver), fish, beans, dried fruit, and iron-fortified/enriched cereals and bread.
If you are taking this product on a prescribed schedule and miss a dose, take it as soon as you remember. If it is near the time for the next dose, skip the missed dose. Take your next dose at the regular time. Do not double the dose to catch up.
Store at room temperature away from light and moisture. Do not freeze liquid forms of this medication. Do not store in the bathroom. Keep all medications away from children and pets.
Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.
HOW TO USE THIS INFORMATION: This is a summary and does NOT have all possible information about this product. This information does not assure that this product is safe, effective, or appropriate for you. This information is not individual medical advice and does not substitute for the advice of your health care professional. Always ask your health care professional for complete information about this product and your specific health needs.
Information last revised August 2023.
Copyright(c) 2023 First Databank, Inc.
Selected from NATIONAL DRUG DATA FILE (NDDF) data included with permission and copyrighted by First Databank, Inc., 2019. This copyrighted material has been downloaded from a licensed data provider.
The above information is intended to supplement, not substitute for, the expertise and judgment of your health care professional. You should consult your health care professional before taking any drug, changing your diet, or commencing or discontinuing any course of treatment.