Skip to main content

Ferrous sulfate/folic acid Side Effects

Applies to ferrous sulfate/folic acid: oral tablet, oral tablet extended release.

Before using this medication, tell your doctor if you are allergic to any drugs, or if you have iron overload syndrome, hemolytic anemia (a lack of red blood cells), porphyria (a genetic enzyme disorder that causes symptoms affecting the skin or nervous system), thalassemia (a genetic disorder of red blood cells), if you are an alcoholic, or if you receive regular blood transfusions.

Seek emergency medical attention if you think you have used too much of this medicine, or if anyone has accidentally swallowed it. An overdose of iron can be fatal, especially in a young child.

Overdose symptoms may include nausea, severe stomach pain, bloody diarrhea, coughing up blood or vomit that looks like coffee grounds, shallow breathing, weak and rapid pulse, pale skin, blue lips, and seizure (convulsions).

Do not give ferrous sulfate to a child without the advice of a doctor.

Take ferrous sulfate and folic acid on an empty stomach, at least 1 hour before or 2 hours after a meal. Avoid taking antacids or antibiotics within 2 hours before or after taking ferrous sulfate and folic acid.

Ferrous sulfate and folic acid is only part of a complete program of treatment that may also include a special diet. It is very important to follow the diet plan created for you by your doctor or nutrition counselor. You should become very familiar with the list of foods you should eat to make sure you get enough iron and folic acid from both your diet and your medication.

Get emergency medical help if you have any of these signs of an allergic reaction while taking ferrous sulfate/folic acid: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Stop using this medication and call your doctor at once if you have any of these serious side effects:

Less serious side effects of ferrous sulfate/folic acid may include:

This is not a complete list of side effects and others may occur. Tell your doctor about any unusual or bothersome side effect.

More about ferrous sulfate/folic acid

Related treatment guides

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.