Nitrofurantoin is an antibiotic that fights bacteria in the body.
Nitrofurantoin is used to treat urinary tract infections.
Nitrofurantoin may also be used for purposes not listed in this medication guide.
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Furadantin, Macrobid, Macrodantin
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have:
diarrhea that is watery or bloody;
sudden chest pain or discomfort, wheezing, dry cough or hack;
new or worsening cough, trouble breathing;
fever, chills, body aches, tiredness, unexplained weight loss;
numbness, tingling, or pain in your hands or feet;
liver problems--nausea, upper stomach pain, itching, tired feeling, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes); or
lupus-like syndrome--joint pain or swelling with fever, swollen glands, muscle aches, chest pain, vomiting, unusual thoughts or behavior, and patchy skin color.
Serious side effects may be more likely in older adults and those who are ill or debilitated.
Common side effects may include:
gas, upset stomach;
mild diarrhea; or
vaginal itching or discharge.
Adults 50-100 mg four times a day -- the lower dosage level is recommended for uncomplicated urinary tract infections.