Macrodantin (Nitrofurantoin)

Nitrofurantoin is taken up by urinary‑tract bacteria and reduced by bacterial nitroreductases to reactive intermediates. These metabolites damage bacterial DNA and inhibit essential enzymes, leading to bacterial cell death and clearance of the infection.

The dosage of Macrodantin is determined by the prescribing clinician based on the patient’s age, renal function, and severity of infection. Typical adult regimens range from 50 mg to 100 mg taken two to four times daily, but the exact schedule must be individualized by a healthcare professional.

The safety of nitrofurantoin during pregnancy is not well established, and it is generally avoided in the first trimester and near term unless benefits outweigh risks. Limited data suggest it may be excreted in breast milk; therefore, use while breastfeeding should be considered only after careful risk assessment by a physician.

To request Macrodantin, submit an enquiry on the product page at gnhindia.com, specifying the required quantity. GNH India supplies hospitals, pharmacies and procurement teams worldwide, verifies trade or institutional credentials, and then provides pricing, availability, shipping details (including any special handling) and import documentation.

The most common alternative for uncomplicated urinary tract infections is trimethoprim‑sulfamethoxazole. Nitrofurantoin (Macrodantin) is often preferred when local resistance to trimethoprim‑sulfamethoxazole is high, as it achieves high urinary concentrations and has a different resistance profile. However, nitrofurantoin is contraindicated in patients with poor renal function, whereas trimethoprim‑sulfamethoxazole can be used in a broader range of renal conditions.

Macrodantin tablets should be stored at ambient temperature, below 25 °C, in the original container to protect them from moisture and light. Keep the product out of reach of children and avoid storing in areas with high humidity or direct sunlight.

Macrodantin is administered orally as a tablet. It should be taken with a full glass of water, preferably after meals to reduce gastrointestinal irritation. Patients are advised to maintain adequate fluid intake to help prevent crystalluria.

Serious adverse events include pulmonary toxicity (which may present as cough, dyspnea, or fever), severe hepatic injury, hemolytic anemia in individuals with G6PD deficiency, peripheral neuropathy, and rare but life‑threatening skin reactions such as Stevens‑Johnson syndrome. Any signs of these conditions require immediate medical attention.

Macrodantin is contraindicated in patients with a known hypersensitivity to nitrofurantoin or other nitrofurans, those with severe renal impairment (creatinine clearance <30 mL/min), and individuals with glucose‑6‑phosphate dehydrogenase (G6PD) deficiency due to the risk of hemolysis. Caution is also advised for pregnant women near term and for breastfeeding mothers.