Nitrofurantoin
Generic Name: Nitrofurantoin
Uses & Medical Indications
Treatment and prophylaxis of urinary tract infections (UTIs)
Uncomplicated Urinary Tract Infections (Cystitis)
Work Mechanism & Pharmacology
Patient Overview of Work Mechanism
Nitrofurantoin works at the cellular level to correct underlying biochemical imbalances, reduce clinical symptoms, and support overall health.
Clinical Mechanism of Action (MoA)
Nitrofurantoin exerts targeted therapeutic activity by interacting with specific cellular receptors, enzymatic pathways, or biological signaling cascades to relieve symptoms and restore physiological balance.
Dosage & Administration Guidelines
100 mg twice daily for 5-7 days (Macrobid)
5-7 mg/kg/day in 4 divided doses (Macrodantin)
Avoid if CrCl < 30 mL/min; Beers Criteria drug
400 mg/day (Macrodantin)
Contraindicated if CrCl < 30 mL/min
Contraindicated in patients with previous nitrofurantoin-associated hepatic toxicity
Side Effects & Safety Warnings
Nausea, headache, flatulence, vomiting, dark urine
Pulmonary toxicity, hepatotoxicity, peripheral neuropathy, hemolytic anemia
Anuria, oliguria, significant renal impairment, pregnancy at term
Pulmonary reactions (acute/chronic), hepatotoxicity
Interactions (Drugs, Food & Alcohol)
Magnesium antacids, probenecid
Take with food to improve absorption and tolerability
No specific interactions
Pregnancy & Breastfeeding Safety
Contraindicated at term (38-42 weeks) due to risk of neonatal hemolytic anemia
Contraindicated if infant is < 1 month or has G6PD deficiency
Patient Counseling & Practical Advice
Take with food. May cause brown urine discoloration.
Take as soon as remembered. Do not double doses.
Signs of pulmonary reaction, liver function, renal function
When to Seek Urgent Medical Attention
Seek immediate emergency medical care (call emergency services or proceed to the nearest emergency department) if you experience signs of a life-threatening allergic reaction (anaphylaxis: facial, lip, tongue, or throat swelling causing airway obstruction), severe cutaneous blistering with skin peeling, sudden intense chest pain, or symptoms of overdose.
Content for Nitrofurantoin was synthesized from standardized public health monographs, official pharmacopoeias, and health authorities:
- Central Drugs Standard Control Organization (CDSCO) — National List of Essential Medicines
- World Health Organization (WHO) — Model List of Essential Medicines
- Indian Pharmacopoeia Commission (IPC) — Indian Pharmacopoeia Drug Monographs
- National Health Service (NHS) — Medicines A to Z Clinical Guidelines
The information provided on this website is for educational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a qualified healthcare provider with any questions you may have regarding a medical condition.