Macrodantin (Nitrofuratoin)
- Macrodantin is a bactericidal oral antibiotic
- Used for: uncomplicated UTI’s, except those caused by Proteus, P. aeruginosa or Serratia
- It cannot be used to treat pyelonephritis or systemic infections due to its poor serum levels
- UTI prophylaxis should be avoided long term because of the potential to cause chronic pulmonary syndrome which can be fatal
- Not recommended for patients with poor renal function
- Side effects: Brown urine, anemia, neuropathy, pulmonary fibrosis, nausea & more
- Pregnant women in their last week of pregnancy with a UTI should not be treated with Macrodantin
- Can take with food to decrease nausea
Contraindications & Precautions
- Hypersensitivity to drug class
- History of hepatic impairment
- History of cholestatic jaundice
- <1 mo of age
- CrCl <60
- Oliguria
- Anuria
- Pregnancy 38-42 wk gestation
- Labor and delivery
- Use with caution in patients with peripheral neuropathy, anemia, DM, electrolyte abnormalities, G6PD deficiency & recent antibiotic associated colitis hx
See CDC Treatment Recommendations
Adult Dosing
Dosage forms: 25,50,100
Adult Dosing for UTI
- 50-100 mg PO Q 6 HR x7 days
- CrCl <60: contraindicated
Adult Dosing for UTI prophylaxis
- 50-100 mg PO Q HS
- CrCl <60: contraindicated
Pediatric Dosing
Dosage forms: 25,50,100
Pediatric Dosing for UTI
1 mo and older
- Dose: 5-7 mg/kg/day PO divided Q 6 HR x7 days; Max: 400 mg/day
Pediatric Dosing for UTI prophylaxis
1 mo and older
- Dose: 1-2 mg/kg/day PO divided Q12-24 HR; Max: 100 mg/day
- CrCl <60: contraindicated
***This is a study guide only & not intended for drug dosing
References
Edmunds, M. W., & Mayhew, M. S. (2014). Pharmacology for the primary care provider (4th ed.). St. Louis, MO: Elsevier Mosby.
Harvey, R. A., Clark, M. A., Finkel, R., Rey, J. A., & Whalen, K. (2012). Pharmacology (5th ed.). Baltimore, MD: Lippincott.