
The following information is a summary about Furadantin. It is not intended to replace a doctor's instructions.
What is nitrofurantoin?
Nitrofurantoin is an antibiotic that fights bacteria in the body.
Nitrofurantoin is used to treat urinary tract infections.
Nitrofurantoin may also be used for purposes other than those listed in this medication
guide.
What is the most important information I should know about nitrofurantoin?
Call your doctor at once if you have a serious side effect such as: feeling short of
breath (even with mild exertion), fever, chills, cough, chest pain, yellowing of the skin or eyes;
pale skin, unusual weakness, numbness or tingling, or diarrhea that is watery or bloody.
Avoid using antacids without your doctor's advice. Use only the specific type of antacid
your doctor recommends. Antacids contain different medicines and some types can make it
harder for your body to absorb nitrofurantoin.
Take this medication for the full prescribed length of time. Your symptoms may
improve before the infection is completely cleared. Nitrofurantoin will not treat a viral infection
such as the common cold or flu.
Take nitrofurantoin with food or milk.
What should I discuss with my healthcare provider before taking
nitrofurantoin?
You should not use this medication if you are allergic to nitrofurantoin, or have
certain conditions. Be sure your doctor knows if you have:
Before taking this medication, tell your doctor if you are allergic to any
drugs, or if you have:
If you have any of these conditions, you may not be able to take
nitrofurantoin, or you may require a dosage adjustment or special tests during treatment.
FDA pregnancy category B. This medication is not expected to be harmful to an
unborn baby, unless it is used during the last 2 to 4 weeks of pregnancy.
Tell your doctor if you are pregnant or plan to become pregnant during treatment.
Nitrofurantoin passes into breast milk and may harm a nursing baby. Do not take this
medication without telling your doctor if you are breast feeding a baby.
Do not give nitrofurantoin to a child younger than 12 years old.
How should I take nitrofurantoin?
Take this medication exactly as prescribed by your doctor. Do not take it in larger
amounts or for longer than recommended. Follow the directions on your prescription label.
Take each dose with a full glass of water.
Take nitrofurantoin with food or milk.
Shake the oral suspension (liquid) well before measuring a dose. To ensure that you
get the correct dose, measure the suspension with a dose-measuring spoon or dropper, not with a
regular table spoon. If you do not have a dose-measuring device, ask your pharmacist where you
can get one.
You may mix your liquid dose with water, milk, or fruit juice to make it easier to
swallow. Drink the entire mixture right away.
Take this medication for the full prescribed length of time. Your symptoms may
improve before the infection is completely cleared. Nitrofurantoin will not treat a viral infection
such as the common cold or flu.
To be sure this medication is not causing harmful effects, your kidney function may need
to be tested. Do not miss any scheduled appointments.
This medication can cause you to have unusual results with certain urine glucose (sugar)
tests. Tell any doctor who treats you that you are using nitrofurantoin.
Store this medication at room temperature away from moisture and heat.
What happens if I miss a dose?
Take the missed dose as soon as you remember. If it is almost time for your next dose,
wait until then to take the medicine and skip the missed dose. Do not take extra
medicine to make up the missed dose.
What happens if I overdose?
Seek emergency medical attention if you think you have used too much of this
medicine.
Overdose symptoms may include nausea or vomiting.
What should I avoid while taking nitrofurantoin?
Antibiotic medicines can cause diarrhea, which may be a sign of a new infection. If you
have diarrhea that is watery or has blood in it, call your doctor. Do not use any medicine to stop
the diarrhea unless your doctor has told you to.
Avoid using antacids without your doctor's advice. Use only the specific type of antacid
your doctor recommends. Antacids contain different medicines and some types can make it
harder for your body to absorb nitrofurantoin.
Nitrofurantoin side effects
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 any of these serious side effects:
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shortness of breath, running out of breath easily;
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fever, chills, cough, chest pain;
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jaundice (yellowing of the skin or eyes);
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pale skin, easy bruising, unusual weakness;
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numbness or tingling; or
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diarrhea that is watery or bloody.
Less serious side effects include:
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rust-colored or brownish urine;
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headache;
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nausea, vomiting, upset stomach;
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bloating or gas, constipation;
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feeling dizzy or drowsy;
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blurred vision; or
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vaginal itching or discharge.
This list is not complete and other side effects may occur. Tell your
doctor about any unusual or bothersome side effect.
What other drugs will affect nitrofurantoin?
Before taking nitrofurantoin, tell your doctor if you are taking:
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magnesium salicylate (Doan's Pills, Mobidin, Momentum);
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choline magnesium salicylate (Tricosal, Trilisate);
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probenecid (Benemid); or
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sulfinpyrazone (Anturane).
This list is not complete and there may be other drugs that can interact
with nitrofurantoin. Tell your doctor about all your prescription and over-the-counter
medications, vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not
start a new medication without telling your doctor.
Where can I get more information?
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Your pharmacist can provide more information about nitrofurantoin.
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Remember, keep this and all other medicines out of the reach of children, never share
your medicines with others, and use this medication only for the indication prescribed.