Generic Name: Nitrofurantoin

  • What is Furadantin?

    Furadantin is an antibiotic used to treat certain bacterial infections of the urinary tract.

  • What is the most important information I should know about Furadantin?

    Furadantin can cause serious side effects, including lung problems, liver or blood disorders, and damage to your nerves. Your doctor will monitor you for these conditions.

    Furadantin can cause diarrhea or colitis (inflammation of the colon). This can occur a couple of months after receiving the last dose of Furadantin. Tell your doctor immediately if you have diarrhea or colitis.

    Use Furadantin as prescribed by your doctor for the full course of treatment, even if symptoms improve earlier. Do not skip doses. Skipping doses or not completing the full course of Furadantin can decrease its effectiveness and can lead to growth of bacteria that are resistant to the effects of Furadantin.

    Furadantin can cause false-positive reactions when testing for the presence of sugar in the urine using certain testing devices.

  • Who should not take Furadantin?

    Do not take Furadantin if you are unable to produce urine, you produce a small amount of urine, you have significant kidney impairment, or a history of jaundice (yellowing of the skin or whites of the eyes) or liver problems associated with nitrofurantoin.

    Do not take Furadantin if you are allergic to it or any of its ingredients; or during the late stages of your pregnancy or labor and delivery.

  • What should I tell my doctor before I take the first dose of Furadantin?

    Tell your doctor about all prescription, over-the-counter, and herbal medications you are taking before beginning treatment with Furadantin. Also, talk to your doctor about your complete medical history, especially if you have kidney or liver disease, anemia, diabetes, electrolyte (chemicals that are important for the cells in your body to function, such as sodium and potassium) imbalances, vitamin B deficiency, debilitating diseases, are pregnant, plan to become pregnant, or are breastfeeding.

  • What is the usual dosage?

    The information below is based on the dosage guidelines your doctor uses. Depending on your condition and medical history, your doctor may prescribe a different regimen. Do not change the dosage or stop taking your medication without your doctor's approval.

    Adults: The recommended dose is 50-100 milligrams (mg) four times a day.

    Children ≥1 month: Your doctor will prescribe the appropriate dose for your child, based on their weight.

  • How should I take Furadantin?

    Take Furadantin exactly as prescribed by your doctor. You can take Furadantin with food to improve its absorption.

  • What should I avoid while taking Furadantin?

    Do not take antacid preparations containing magnesium trisilicate while taking Furadantin.

  • What are possible food and drug interactions associated with Furadantin?

    If Furadantin is taken with certain other drugs, the effects of either could be increased, decreased, or altered. It is especially important to check with your doctor before combining Furadantin with antacids containing magnesium trisilicate, probenecid, or sulfinpyrazone.

  • What are the possible side effects of Furadantin?

    Side effects cannot be anticipated. If any develop or change in intensity, tell your doctor as soon as possible. Only your doctor can determine if it is safe for you to continue taking this drug.

    Side effects may include: allergic reactions, changes in sensation, changes in vision, chest pain, chills, colitis, cough, diarrhea, difficulty breathing, dizziness, drowsiness, fever, headache, jaundice, loss of appetite, motion sickness, nausea, rash, vomiting, weakness

  • Can I receive Furadantin if I am pregnant or breastfeeding?

    The effects of Furadantin during pregnancy are unknown. Furadantin can be found in your breast milk if you take it during breastfeeding. Tell your doctor immediately if you are pregnant, plan to become pregnant, or are breastfeeding.

  • What should I do if I miss a dose of Furadantin?

    If you miss a dose of Furadantin, take it as soon as you remember. However, if it is almost time for your next dose, skip the one you missed and return to your regular dosing schedule. Do not take two doses at once.

  • How should I store Furadantin?

    Store at room temperature. Do not expose to strong light. Protect from freezing.