Nitrofast 100mg Tablet Sr: Complete Medicine Guide
Clinical Reference Standards: CDSCO (Central Drugs Standard Control Organisation), Indian Pharmacopoeia (IP) & WHO | Last Updated: September 2026
When to Call Your Doctor IMMEDIATELY
- Blood in stool or vomit
- Severe abdominal pain
- Chest pain or difficulty breathing
- Severe headache with visual changes
- Sudden swelling of face, lips, or throat
- Yellowing of skin or eyes
- Decreased urine output
- Numbness or tingling in hands or feet
If experiencing severe symptoms, call emergency services immediately.
What is nitrofast 100mg tablet sr used for?
This medicine is an antibiotic used to treat and prevent uncomplicated urinary tract infections. It works by killing bacteria in the urinary tract. Take it with food, swallow the tablet whole, and complete the full course as prescribed.
- Generic Name: Information coming soon
- Manufacturer: Multiple manufacturers
- Form: Allopathy
- Pregnancy Category: Consult doctor
- Prescription Required: Yes
🇮🇳 nitrofast 100mg tablet sr के बारे में (Hindi Summary)
उपयोग: यह दवा नाइट्रोफ्यूरेंटोइन का एक सस्टेन्ड-रिलीज़ टैबलेट है, जिसका उपयोग मूत्र मार्ग के संक्रमण (यूटीआई) के इलाज और रोकथाम के लिए किया जाता है। यह बैक्टीरिया को मारकर काम करती है और मूत्र मार्ग में संक्रमण को फैलने से रोकती है। यह दवा केवल उन रोगियों के लिए है जिन्हें मूत्र मार्ग में संक्रमण है, और इसे भोजन के साथ लेना चाहिए। गुर्दे की बीमारी, गर्भावस्था के अंतिम चरण, या 1 महीने से छोटे बच्चों में इसका उपयोग नहीं करना चाहिए।
साइड इफेक्ट्स: इस दवा के सामान्य दुष्प्रभावों में मतली, सिरदर्द, पेट में गैस, और दस्त शामिल हैं। गंभीर दुष्प्रभावों में फेफड़ों की प्रतिक्रिया, तंत्रिका क्षति, यकृत की समस्या, और एनीमिया शामिल हो सकते हैं। यदि आपको सांस लेने में कठिनाई, सुन्नपन, या पीलिया जैसे लक्षण दिखें, तो तुरंत डॉक्टर से संपर्क करें।
सुरक्षा सलाह: इस दवा को भोजन के साथ लें ताकि पेट की परेशानी कम हो और अवशोषण बेहतर हो। टैबलेट को पूरा निगलें, चबाएं या तोड़ें नहीं। पूरा कोर्स पूरा करें, भले ही लक्षण ठीक हो जाएं। खूब पानी पिएं। मैग्नीशियम ट्राइसिलिकेट वाले एंटासिड को इस दवा के 2 घंटे के भीतर न लें। यदि आपको सुन्नपन, झुनझुनी, या मांसपेशियों में कमजोरी महसूस हो, तो तुरंत डॉक्टर से मिलें।
💊 nitrofast 100mg tablet sr Uses & Benefits
[{"condition":"Uncomplicated urinary tract infection (acute cystitis)","description":"This medicine is used to treat acute uncomplicated urinary tract infections caused by susceptible strains of Escherichia coli, Enterococcus species, Staphylococcus saprophyticus, and certain Klebsiella species.","evidence":"Well-established"},{"condition":"Recurrent urinary tract infection prophylaxis","description":"This medicine is prescribed for long-term prevention of recurrent urinary tract infections in women and in patients with structural or functional urinary tract abnormalities.","evidence":"Well-established"}]
Off-label uses: [{"condition":"Prophylaxis for urinary tract infections in patients undergoing urological procedures","description":"Sometimes used off-label to prevent urinary tract infections after catheterization or urological surgery.","evidence":"Limited"}]
Primary treatment for: Urinary tract infection
Also treats: Recurrent urinary tract infection, Cystitis
📋 Drug Information
| Generic Name(s) | Information coming soon |
| Brand Name | nitrofast 100mg tablet sr |
| Manufacturer | Multiple manufacturers |
| Packaging / Form | Varies by brand (Allopathy) |
| Therapeutic Class | UROLOGY |
| Action Class | Urinary Antiseptic-Nitrofurantoin |
| Route of Administration | Oral |
| Storage | Store at room temperature (15-30°C) in a dry place, away from direct sunlight. Keep in the original container. |
| Shelf Life | 24 months from the date of manufacture. |
| WHO Guideline | Not established from the available information. |
| ICMR Guideline | Not established from the available information. |
👨⚕️ Doctor's Practical Tips
Evidence-based practical advice from experienced clinicians
🔍 Is This Medicine Right for Your Symptom?
Educational reference. Always consult a doctor for diagnosis.
🔬 How This Medicine Works (Pharmacology)
Pharmacokinetics
How It Works
This medicine works by entering bacterial cells and being reduced by bacterial flavoproteins to reactive intermediates that inactivate ribosomal proteins and other macromolecules. This leads to inhibition of protein synthesis, RNA and DNA synthesis, and carbohydrate metabolism, ultimately causing bacterial cell death. It is bactericidal against susceptible organisms.
Mechanism Steps
💡 How to Take nitrofast 100mg tablet sr
Strength: 100 mg sustained-release tablet
Dosage Information
| Adult Dosage | The usual adult dose of this medicine for acute uncomplicated urinary tract infection is 100 mg twice daily for 5 to 7 days. For prophylaxis of recurrent urinary tract infections, the dose is 50 to 100 mg once daily at bedtime. Dose must be individualized by a qualified clinician based on indication, age, weight, renal and hepatic function. |
| Pediatric Dosage | Pediatric dosing is not established from available information. Consult a pediatrician. |
| Elderly Dosage | Elderly patients may have reduced renal function and are at higher risk of adverse effects. Dose should be adjusted based on creatinine clearance. Consult a doctor for individualized dosing. |
| Renal Impairment | This medicine is contraindicated in patients with creatinine clearance less than 60 mL/min. For patients with creatinine clearance between 60 and 90 mL/min, no dose adjustment is usually needed, but monitor closely. Consult a doctor for individualized dosing. |
| Hepatic Impairment | No specific dose adjustment is established for hepatic impairment. Use with caution and monitor liver function. Consult a doctor. |
| Maximum Daily Dose | The maximum recommended daily dose of this medicine is 200 mg for treatment and 100 mg for prophylaxis. |
Dosage Timeline
🍽️ Food Timing Guide
⏰ What to Do If You Miss a Dose
⚠️ Side Effects of nitrofast 100mg tablet sr
✅ Common Side Effects
🚨 Serious Side Effects
⚠️ Rare Side Effects
Consult your doctor if you experience any unusual symptoms.
🔬 Drug Interactions
| Drug | Severity | Effect |
|---|---|---|
| Fluoroquinolones | Major | |
| Antacids (magnesium trisilicate) | Major | |
| Uricosuric drugs | Major | |
| Warfarin | Moderate | |
| Live typhoid vaccine | Moderate | |
| Anticholinergic drugs | Minor |
🚨 Major Interactions
- Fluoroquinolones (e.g., ciprofloxacin, levofloxacin)
- Antacids containing magnesium trisilicate
- Uricosuric drugs (e.g., probenecid, sulfinpyrazone)
⚡ Moderate Interactions
- Warfarin
- Live typhoid vaccine
🍷 Alcohol Interaction
Alcohol may worsen gastrointestinal side effects such as nausea and diarrhea. It is advisable to avoid alcohol while taking this medicine.
🔎 Check Your Other Medicines
Educational tool. Always confirm with your doctor or pharmacist.
🛡️ Safety & Warnings
🚫 Contraindications
["Known allergy to nitrofurantoin or any component of the formulation","Significant renal impairment (creatinine clearance
⚠️ Warnings & Precautions
["Take with food to improve absorption and reduce stomach upset.","Swallow the sustained-release tablet whole; do not crush, chew, or split.","Complete the full prescribed course even if symptoms improve.","Drink plenty of water to help flush the urinary tract.","Avoid antacids containing magnesium trisilicate within 2 hours of this medicine.","Inform your doctor if you have kidney disease, anemia, diabetes, or a history of lung or nerve problems.","Do not use for longer than prescribed without medical supervision.","Stop the medicine and contact your doctor immediately if you experience numbness, tingling, or muscle weakness."]
🤱 Lactation Safety
This medicine is excreted in breast milk. It is generally considered safe during breastfeeding if the infant is healthy and full-term, but avoid use in infants under 1 month of age or those with glucose-6-phosphate dehydrogenase deficiency. Consult your doctor.
💊 Overdose Management
Overdose of this medicine may cause nausea, vomiting, and diarrhea. In severe cases, it can lead to peripheral neuropathy or hepatotoxicity. There is no specific antidote. Treatment is supportive and symptomatic. Seek immediate medical attention if overdose is suspected.
⏰ Missed Dose
If you miss a dose, take it as soon as you remember. If it is almost time for your next dose, skip the missed dose and continue with your regular schedule. Do not double dose to catch up.
Additional Safety Advice
Take this medicine with food to improve absorption and reduce stomach upset. Swallow the sustained-release tablet whole; do not crush, chew, or split it. Complete the full prescribed course even if you feel better. Drink plenty of water to help flush the urinary tract. Avoid taking antacids containing magnesium trisilicate within two hours of this medicine, as they can reduce its effectiveness. Inform your doctor if you have kidney disease, anemia, diabetes, or a history of lung or nerve problems. Do not use this medicine for longer than prescribed without medical supervision. If you experience numbness, tingling, or muscle weakness, stop the medicine and contact your doctor immediately.
👴 Special Considerations for Elderly
💡 For Patients Above 65
Elderly patients are at higher risk of adverse effects due to reduced renal function. Dose should be adjusted based on creatinine clearance. Monitor closely for signs of toxicity.
🤰 Pregnancy Planning (TTC)
If you are planning pregnancy, consult your doctor before taking this medicine. It is not recommended during pregnancy at term. Alternative antibiotics may be considered.
🏥 Post-Surgery Considerations
This medicine may be used prophylactically after urological procedures. Consult your doctor for appropriate timing and duration.
🦷 Dental Procedures
Inform your dentist if you are taking this medicine. It may interact with certain antibiotics used in dentistry. No routine dose adjustment is needed for dental procedures.
💚 Lifestyle Tips for Better Results
🏋️ Exercise Considerations
Moderate exercise is generally safe while taking this medicine. However, if you experience dizziness or fatigue, avoid strenuous activities until you feel better. Stay hydrated during exercise.
🥗 Diet Recommendations
💼 Impact on Daily Work & Life
This medicine may cause dizziness or fatigue in some people. If affected, avoid driving or operating heavy machinery until you know how it affects you. Otherwise, it should not significantly impact your daily activities.
🛑 When to Stop This Medicine
Stop taking this medicine and contact your doctor immediately if you experience numbness, tingling, muscle weakness, difficulty breathing, chest pain, or signs of an allergic reaction. Do not stop the course early unless advised by your doctor, as this may lead to recurrence or resistance.
📅 Long-Term Use Effects
Long-term use of this medicine may increase the risk of pulmonary reactions, peripheral neuropathy, and hepatotoxicity. Regular monitoring of lung, liver, and nerve function is recommended for patients on prolonged therapy. Report any new symptoms promptly.
🌿 Non-Medicine Approaches
These can complement medicine but do not replace prescribed treatment.
Drinking plenty of water helps flush bacteria from the urinary tract and can complement antibiotic therapy.
Evidence: Well-establishedCranberry juice or supplements may help prevent UTIs by preventing bacteria from adhering to the urinary tract lining.
Evidence: LimitedProbiotics may help restore healthy gut and urinary tract flora, especially during and after antibiotic therapy.
Evidence: Limited💉 Vaccination Considerations
💉 If You're Getting Vaccinated
This medicine may reduce the efficacy of live bacterial vaccines such as the live typhoid vaccine. Avoid concurrent use and complete the antibiotic course before vaccination.
📦 Storage Guide
✅ DO
Store at room temperature (15-30°C)
❌ DON'T
Do not refrigerate unless specified
✅ DO
Keep in original container
❌ DON'T
Do not transfer to unmarked containers
✅ DO
Keep away from direct sunlight
❌ DON'T
Do not store in bathroom cabinet
✈️ Traveling with This Medicine
Carry this medicine in its original packaging with a copy of your prescription. Store at room temperature and protect from direct sunlight. If traveling across time zones, adjust dosing times gradually to maintain consistent intervals. Check customs regulations for carrying prescription medicines. Keep enough supply for your entire trip.
💰 Cost Analysis & Savings
👥 Real Patient Stories
Educational, anonymized scenarios. Individual results may vary.
💬 Questions Patients Often Ask
A: This medicine starts working within 1 to 2 hours, but symptom relief may take 24 to 48 hours. Complete the full course as prescribed.
A: Yes, take this medicine with food to improve absorption and reduce stomach upset.
A: If you miss a dose, take it as soon as you remember. If it is almost time for your next dose, skip the missed dose and continue with your regular schedule. Do not double dose.
A: This medicine is not recommended during pregnancy at term (38-42 weeks) or during labor and delivery. Consult your doctor for guidance.
A: Alcohol may worsen gastrointestinal side effects such as nausea and diarrhea. It is advisable to avoid alcohol while taking this medicine.
🤔 Common Patient Concerns
🛑 Myths vs. Facts
- Myth: This medicine can be used for any type of infection.
Fact: This medicine is only effective for urinary tract infections caused by susceptible bacteria. It is not effective for other infections. - Myth: You can stop taking this medicine once symptoms improve.
Fact: You must complete the full prescribed course to prevent bacterial resistance and recurrence. - Myth: This medicine is safe for everyone.
Fact: It is not safe for patients with significant kidney impairment, pregnant women at term, infants under 1 month, or those with G6PD deficiency.
🔄 Alternative Options
Generic Alternatives
- Nitrofurantoin sustained-release tablet
Brand Alternatives
- Nitrofurantoin sustained-release tablet