C. diff Risk


Oral Bioavailability


Approximate Cost

$1-2/day (Oral)

General Information

First Line Indications

Nitrofurantoin can only be used to treat cystitis (not febrile UTI nor suspected or confirmed pyelonephritis) as the blood levels are low or undetectable.

Total duration of therapy for cystitis should be 5 - 7 days.

Oral Liquids

Concentration: 10 mg/mL (compounded)

Taste: Fair

Not all strengths of oral liquids are listed nor be available on the CHEO Formulary

Tablet/Capsule Strengths

  • 100 mg capsule (macrocrystals)

  • 50 mg tablet

  • 100 mg tablet

Tablets or capsules are preferred especially over an unpleasant tasting oral liquid.

Not all strengths of oral tablets/capsules are listed and they are not all available on the CHEO Formulary.