Commonly used brand name(s):
In the U.S.
Available Dosage Forms:
Therapeutic Class: Antibiotic
Chemical Class: Nitrofuran
Nitrofurantoin is used to treat urinary tract infections. nitrofurantoin is an antibiotic. It works by killing bacteria or preventing their growth. However, nitrofurantoin will not work for colds, flu, or other virus infections.
nitrofurantoin is available only with your doctor's prescription.
In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For nitrofurantoin, the following should be considered:
Tell your doctor if you have ever had any unusual or allergic reaction to nitrofurantoin or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.
Appropriate studies performed to date have not demonstrated pediatric-specific problems that would limit the usefulness of nitrofurantoin in children. Safety and efficacy have not been established in infants below 1 month of age.
Appropriate studies performed to date have not demonstrated geriatric-specific problems that would limit the usefulness of nitrofurantoin in the elderly. However, elderly patients are more likely to have age-related heart, liver, lung, or kidney problems, which may require caution in patients receiving nitrofurantoin.
|All Trimesters||B||Animal studies have revealed no evidence of harm to the fetus, however, there are no adequate studies in pregnant women OR animal studies have shown an adverse effect, but adequate studies in pregnant women have failed to demonstrate a risk to the fetus.|
There are no adequate studies in women for determining infant risk when using this medication during breastfeeding. Weigh the potential benefits against the potential risks before taking this medication while breastfeeding.
Using nitrofurantoin with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.
Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. Discuss with your healthcare professional the use of your medicine with food, alcohol, or tobacco.
The presence of other medical problems may affect the use of nitrofurantoin. Make sure you tell your doctor if you have any other medical problems, especially:
Take nitrofurantoin only as directed by your doctor. Do not take more of it, do not take it more often, and do not take it for a longer time than your doctor ordered.
Nitrofurantoin is best taken with food or milk. This may lessen stomach upset and help your body to absorb the medicine.
To help clear up your infection completely, keep taking nitrofurantoin for the full time of treatment, even if you begin to feel better after a few days. Do not miss any doses.
Shake the oral liquid forcefully before each dose to make sure the medicine is evenly mixed. Use a specially marked measuring spoon or other device to measure each dose accurately. The average household teaspoon may not hold the right amount of liquid.
Swallow the capsule whole. Do not open, crush, or chew the capsule before swallowing it.
Do not take antacids containing magnesium trisilicate (e.g., Genaton®) while you are using nitrofurantoin. It may prevent the medicine from working properly.
The dose of nitrofurantoin will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of nitrofurantoin. If your dose is different, do not change it unless your doctor tells you to do so.
The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.
If you miss a dose of nitrofurantoin, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses.
Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.
Keep out of the reach of children.
Do not keep outdated medicine or medicine no longer needed.
Ask your healthcare professional how you should dispose of any medicine you do not use.
If you or your child will be taking nitrofurantoin for a long time, it is very important that your doctor check you at regular visits for any problems or unwanted effects that may be caused by nitrofurantoin.
If you or your child's symptoms do not improve within a few days, or if they become worse, check with your doctor.
Diabetic patients that use urine sugar tests should be careful when using nitrofurantoin. Nitrofurantoin may cause false test results with some urine sugar tests. Check with your doctor before changing your diet or the dose of your diabetes medicine.
Liver problems may occur while you are using nitrofurantoin. Stop using nitrofurantoin and check with your doctor right away if you are having more than one of these symptoms: stomach pain or tenderness; clay-colored stools; dark urine; decreased appetite; fever; headache; itching; loss of appetite; nausea and vomiting; skin rash; swelling of the feet or lower legs; unusual tiredness or weakness; or yellow eyes or skin.
Tell your doctor right away if you start having numbness, tingling, or burning pain in your hands, arms, legs, or feet. These may be symptoms of a condition called peripheral neuropathy.
Nitrofurantoin may cause diarrhea, and in some cases it can be severe. Do not take any medicine to treat diarrhea without first checking with your doctor. Diarrhea medicines may make the diarrhea worse or make it last longer. If you have any questions about this, or if mild diarrhea continues or gets worse, check with your doctor.
nitrofurantoin may cause the urine to become a rust-yellow to brown color. This side effect does not require medical attention.
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur:More common
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:More common
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.
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