Nitrofurantoïne Focus Care (Nitrofurantoin)

• Nitrofurantoin is indicated for urinary tract infections and related conditions.
• Uncomplicated urinary tract infection: eliminates the causative bacteria in the bladder, relieving symptoms and preventing progression.
• Acute cystitis: provides rapid bacteriostatic or bactericidal activity to resolve infection.
• Recurrent urinary tract infection prophylaxis: reduces the frequency of future infections when taken as a preventive regimen.

• Nitrofurantoin interferes with bacterial carbohydrate metabolism by inhibiting enzymes such as enolpyruvyl‑shikimate‑3‑phosphate synthase, disrupting cell‑wall synthesis and bacterial replication. At low concentrations it is bacteriostatic; at higher concentrations it becomes bactericidal, primarily against common urinary pathogens like Escherichia coli, Enterococcus spp., and Staphylococcus saprophyticus.

Nitrofurantoin may cause a range of adverse reactions, varying from mild to severe.

Common Side Effects

• Nausea
• Loss of appetite
• Headache
• Diarrhea

Serious or Rare Side Effects

• Pulmonary toxicity (interstitial pneumonitis or fibrosis)
• Hepatic injury (hepatitis, jaundice)
• Severe allergic reactions (anaphylaxis, Stevens‑Johnson syndrome)

When prescribing Nitrofurantïne Focus Care, clinicians should consider several safety measures.

• Assess renal function: avoid use in patients with creatinine clearance below 60 mL/min.
• Monitor for pulmonary symptoms: discontinue if cough, dyspnea, or fever develop.
• Avoid in patients with known G6PD deficiency: risk of hemolysis.
• Use with caution during pregnancy: limited data; consider alternatives when possible.
• Limit duration of therapy: prolonged use increases risk of liver and lung toxicity.
• Store at ambient temperature below 25°C: keep in the original container, protect from moisture and light.

Nitrofurantoin can interact with several medicines, requiring attention to avoid reduced efficacy or increased toxicity.

Major Interactions (Avoid)

• Antacids containing magnesium or aluminum: reduce nitrofurantoin absorption.
• Probenecid: increases plasma concentration, raising toxicity risk.
• Trimethoprim‑sulfamethoxazole: additive bone‑marrow suppression.

Moderate Interactions (Monitor Closely)

• Warfarin: may enhance anticoagulant effect, requiring INR monitoring.
• NSAIDs: can worsen renal impairment when combined.
• Diuretics: may increase risk of crystalluria, especially in dehydrated patients.