Nitrofurantoin capsules usp 100 mg uses?

Nitrofurantoin 100 mg capsules (USP) are an antibiotic mainly used for lower urinary tract infections.

- Primary use: treatment of acute uncomplicated cystitis and prevention (prophylaxis) of recurrent UTIs caused by susceptible bacteria.
- Not for: kidney infections (pyelonephritis) or systemic infections.
- Typical adult dosing (for acute cystitis): 100 mg by mouth twice daily for about 5 days (some regimens may be 5–7 days).
- Prophylaxis (recurrent UTIs): low-dose regimens such as 50–100 mg at bedtime, as directed.
- Take with food to improve absorption and reduce GI upset.

Important cautions:
- Do not use if you have significant renal impairment (creatinine clearance <60 mL/min) or in the last part of pregnancy (near term); avoid in newborns and infants <1 month.
- People with G6PD deficiency may have hemolytic anemia.
- Possible side effects: nausea, diarrhea, headache; rare but serious effects include lung, liver, or hematologic toxicity.

If you’re considering this medication, follow your doctor’s exact dosing and check for any drug interactions or contraindications.