Nitrofurantoin Q Pharma (Nitrofurantoin, Macrocrystalline)

Nitrofurantoin, the active ingredient in Nitrofurantoin Q Pharma, is a nitrofuran antibiotic presented as a macrocrystalline oral formulation for systemic use. It treats uncomplicated urinary tract infections, especially cystitis, in adult patients and is indicated for short‑course therapy.

GNH USA supplies Nitrofurantoin Q Pharma as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide.

Nitrofurantoin is used to treat bacterial infections of the lower urinary tract. - Uncomplicated urinary tract infection: eradicates susceptible uropathogens and resolves symptoms. - Cystitis: provides rapid relief of dysuria, frequency and urgency while clearing the infection. - Prophylaxis of recurrent urinary tract infection: reduces the incidence of repeat episodes when taken as prescribed.

Adverse reactions may range from mild to severe and should be monitored during therapy.

Common Side Effects: - Nausea: transient stomach upset occurring early in treatment. - Diarrhea: loose stools that usually resolve without intervention. - Headache: mild to moderate pain often improving with hydration. - Metallic taste: temporary alteration of taste perception.

Serious or Rare Side Effects: - Pulmonary toxicity: interstitial pneumonitis or fibrosis requiring discontinuation. - Hepatic injury: elevated liver enzymes or hepatitis. - Hemolytic anemia in G6PD‑deficient patients: sudden drop in hemoglobin. - Severe allergic reactions: rash, angioedema or anaphylaxis. - Peripheral neuropathy: numbness or tingling in extremities.

Nitrofurantoin should be prescribed with attention to patient‑specific factors and safety considerations. - Renal function assessment: avoid use when creatinine clearance is <60 mL/min. - Pregnancy category B: generally safe in pregnancy but use only if clearly needed. - Breastfeeding: small amounts excreted in milk; weigh benefits against potential infant exposure. - G6PD deficiency: contraindicated due to risk of hemolysis. - Monitor for pulmonary symptoms: discontinue if cough or dyspnea develop. - Store below 25°C: keep in the original pack, protect from moisture.

Nitrofurantoin may interact with other medicines, altering its efficacy or safety.

Major Interactions (Avoid): - Antacids containing magnesium or aluminum: reduce absorption; separate dosing by at least 2 hours. - Probenecid: decreases renal excretion, increasing toxicity risk. - Warfarin: may potentiate anticoagulant effect; monitor INR closely.

Moderate Interactions (Monitor Closely): - NSAIDs: may increase risk of renal impairment. - Diuretics: can exacerbate reduced renal clearance. - High‑dose vitamin C: may acidify urine and affect drug stability. - Oral contraceptives: potential reduction in contraceptive efficacy; advise backup method.