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You are here : 3-RX.com > Drugs & Medications > Detailed Drug Information (USP DI) > Nitrofurantoin : Side Effects

Nitrofurantoin (Systemic)

Brand Names : Furadantin, Macrobid, Macrodantin, Apo-Nitrofurantoin, Novo-Furantoin

Nitrofurantoin | Before Using | Proper Use | Precautions | Side Effects

Side Effects of This Medicine

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

      Changes in facial skin color; chest pain; chills; cough; fever; general feeling of discomfort or illness; hives; hoarseness; itching; joint or muscle pain; shortness of breath; skin rash; sudden trouble in swallowing or breathing; swelling of face, mouth, hands, or feet; troubled breathing

    Less common

      Black, tarry stools; blood in urine or stools; burning, numbness, tingling, or painful sensations; dizziness; drowsiness; headache; pinpoint red spots on skin; sore throat; unusual bleeding or bruising; unusual tiredness or weakness; weakness in arms, hands, legs, or feet


      Abdominal or stomach pain; blistering, peeling, or loosening of skin and mucous membranes; bluish color of skin; blurred vision or loss of vision, with or without eye pain; bulging fontanel in infants; confusion; darkening of urine; diarrhea, watery and severe, which may also be bloody; loss of appetite; mental depression; mood or mental changes; nausea or vomiting; pale skin; pale stools; red skin lesions, often with a purple center; red, thickened, or scaly skin; skin rash; sores, ulcers, or white spots on lips or in mouth; swollen or painful glands; unpleasant breath odor; visual changes; vomiting of blood; wheezing or tightness in chest; yellow eyes or skin

Other 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. However, check with your doctor if any of the following side effects continue or are bothersome:

    More common

      Diarrhea; gas

    After you stop using this medicine, your body may need time to adjust. The length of time this takes depends on the amount of medicine you were using and how long you used it. During this period of time check with your doctor immediately if you notice any of the following side effects:

        Abdominal or stomach cramps or pain, severe; diarrhea, watery and severe, which may also be bloody; fever

This medicine may cause the urine to become rust-yellow to brown. This side effect does not require medical attention.

Nitrofurantoin may cause a temporary loss of hair in some people.

Other side effects not listed above may also occur in some patients. If you notice any other effects, check with your doctor.

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Nitrofurantoin: Precautions


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