Nitrofurantoin (By mouth)
nye-troe-fure-AN-toyn
Treats or prevents urinary tract infections.
Drug classes
Antibiotic (About this – PubMed Health)
Uses
Uses of This Medicine
Nitrofurantoin is used to treat urinary tract infections. This medicine is an antibiotic. It works by killing bacteria or preventing their growth. However, this medicine will not work for colds, flu, or other virus infections.
This medicine is available only with your doctor’s prescription.
Other uses (PubMed Health)
How To Use
Liquid, Tablet
Your doctor will tell you how much medicine to use. Do not use more than directed.
It is best to take this medicine with food or milk.
Measure the oral liquid medicine with a marked measuring spoon, oral syringe, or medicine cup.
Take all of the medicine in your prescription to clear up your infection, even if you feel better after the first few doses.
If a dose is missed:
Take a dose as soon as you remember. If it is almost time for your next dose, wait until then and take a regular dose. Do not take extra medicine to make up for a missed dose.
How to Store and Dispose of This Medicine:
Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light.
Ask your pharmacist, doctor, or health caregiver about the best way to dispose of any outdated medicine or medicine no longer needed.
Keep all medicine out of the reach of children. Never share your medicine with anyone.
Drugs and Foods to Avoid
Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.
Make sure your doctor knows if you are also using probenecid (Benemid®) or sulfinpyrazone (Anturane®).
It is best not to use antacids containing magnesium trisilicate (such as Genaton®) while you are using nitrofurantoin.
When Not To Use
You should not use this medicine if you have had an allergic reaction to nitrofurantoin or if you are in your last few weeks of pregnancy (week 38 or later). You should not use this medicine if you have severe kidney disease, a decreased amount of urine, or are unable to urinate. You should not use this medicine if you had liver problems after using it before. Do not give this medicine to infants younger than 1 month of age.
Warnings
Make sure your doctor knows if you are pregnant or breastfeeding, or if you have kidney disease, liver disease, lung disease, anemia, diabetes, a mineral imbalance in the blood, vitamin B deficiency, or a blood condition called G6PD-deficiency.
This medicine may cause your urine to become brown-colored. This is normal and will not affect how the medicine works.
This medicine can cause diarrhea. Call your doctor if the diarrhea becomes severe, does not stop, or is bloody. Do not take any medicine to stop diarrhea until you have talked to your doctor. Diarrhea can occur 2 months or more after you stop taking this medicine.
Use this medicine only to treat the infection you now have.
Call your doctor if your symptoms do not improve or if they get worse.
Your doctor will do lab tests at regular visits to check on the effects of this medicine. Keep all appointments.
Possible side effects
Summary More details
Call your doctor right away if you notice any of these side effects:
Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing
Blistering, peeling, or red skin rash.
Cough, fever, chills, weakness, shortness of breath, or chest pain.
Dark-colored urine or pale stools.
Nausea, vomiting, loss of appetite, or pain in your upper stomach.
Numbness, tingling, or burning pain in your hands, arms, legs, or feet.
Severe and watery diarrhea that may contain blood.
Yellowing of your skin or the whites of your eyes.
If you notice these less serious side effects, talk with your doctor:
Dizziness, headache, or blurred vision.
Mild nausea, vomiting, stomach pain, or loss of appetite.
Temporary hair loss.
Vaginal itching or discharge.
If you notice other side effects that you think are caused by this medicine, tell your doctor.
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
More side effects of this drug
Brand names include
Furadantin, Macrodantin, Novo-Furan Suspension
There may be other brand names for this medicine.