Generic Name: Nitrofurantoin

  • What is Macrobid?

    Macrobid is an antibiotic used to treat urinary tract infections.

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

    Macrobid is intended to treat infections from bacteria, not viruses (such as the flu or the common cold). Although you may feel better soon after starting treatment, it is important to take Macrobid exactly as directed for the full course of treatment. Skipping doses or not completing the full course of treatment may decrease the effectiveness of Macrobid and lead to the bacteria developing resistance so that it may not be treatable by Macrobid or other antibiotics in the future.

    Macrobid commonly causes diarrhea, which usually ends when the drug is discontinued. Sometimes after starting treatment with Macrobid, you may get watery and bloody stools (with or without stomach cramps or fever), even as late as 2 or more months after taking the last dose of Macrobid. If this happens, call your doctor as soon as possible.

    Rarely, Macrobid has caused serious side effects, which has led to death in some cases. These side effects included lung problems, liver or blood disorders, and nerve pain.

  • Who should not take Macrobid?

    Do not take Macrobid if you are allergic to any of its ingredients, have kidney problems, or if you developed jaundice (yellowing of the skin or whites of the eyes) or liver problems related to previous treatment with Macrobid.

    This drug should not be used in pregnant women at term (38-42 weeks); during labor and delivery; or in newborns under 1 month old.

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

    Tell your doctor about all prescription, over-the-counter, and herbal medications you are taking before beginning treatment with Macrobid. Also, talk to your doctor about your complete medical history, especially if you have gout (severe and painful inflammation of the joints).

  • 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 and children >12 years: One 100-milligram (mg) capsule every 12 hours for 7 days.

  • How should I take Macrobid?

    Take Macrobid with food (preferably at breakfast and dinner) and complete the full course of therapy.

  • What should I avoid while taking Macrobid?

    Do not use antacids containing magnesium while taking Macrobid.

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

    If Macrobid 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 Macrobid with antacids containing magnesium and gout drugs such as probenecid and sulfinpyrazone.

  • What are the possible side effects of Macrobid?

    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, lung problems, liver damage, nerve pain, nausea, headache, gas, diarrhea, dizziness, hair loss, red blood cell disorder

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

    The effects of Macrobid during pregnancy and breastfeeding are unknown. 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 Macrobid?

    If you miss a dose of Macrobid, 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 Macrobid?

    Store at room temperature.

Meet the Pharmacists

I'm Beth Isaac, PharmD. Welcome to PDR Health!

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