Description
Urifast 100 mg (Nitrofurantoin) – Uses, Dosage, Side Effects & Safety
Urifast 100 mg contains Nitrofurantoin, a highly effective antibiotic widely prescribed for urinary tract infections (UTIs), including infections of the bladder (cystitis). It works by killing bacteria specifically in the urinary tract and is considered one of the most trusted first-line medications for uncomplicated UTIs in women and select male patients.
Nitrofurantoin concentrates in urine, making it extremely effective for UTIs while causing minimal resistance compared to many other antibiotics. Urifast 100 mg is suitable for adults and older children as prescribed.
Product introduction
Urifast 100 mg is an oral antibacterial medication that targets bacteria in the urinary system. It prevents bacteria from producing the essential components needed for survival. Because the drug concentrates in urine, it effectively eliminates bacteria in the bladder with minimal systemic spread.
Urifast is typically prescribed for uncomplicated urinary tract infections, especially those caused by E. coli, the most common UTI-causing bacteria.
Uses of Urifast 100 mg (Nitrofurantoin)
Doctors prescribe Urifast 100 mg for:
- Acute uncomplicated urinary tract infections (UTIs)
- Bacterial cystitis (bladder infection)
- Recurrent UTIs (as prophylaxis depending on doctor’s advice)
- UTIs caused by susceptible strains of E. coli, Enterococcus, Staphylococcus saprophyticus, and others
Not for: kidney infections (pyelonephritis) or severe UTIs involving fever, flank pain, or blood infection.
Benefits of Urifast 100 mg (Nitrofurantoin)
Urifast is widely recommended due to several advantages:
- UTI-specific action – concentrates in urine, making treatment highly targeted
- Low bacterial resistance – effective even when other antibiotics fail
- Fast symptom relief – burning urination, urgency and frequency reduce quickly
- Safe for repeated use when monitored by a doctor for chronic UTI patients
- Minimal effect on gut flora compared to broad-spectrum antibiotics
In Treatment of Worm infections
Important note: Nitrofurantoin does not treat worm (helminth) infections. This heading is part of your standard template but is not medically applicable.
Side effects of Urifast 100 mg (Nitrofurantoin)
Common side effects
- Nausea or vomiting
- Loss of appetite
- Diarrhea or stomach pain
- Headache
- Dark yellow or brown urine (harmless)
How to use Urifast 100 mg (Nitrofurantoin)
Use exactly as your doctor prescribes. General guidelines:
- Take with food to enhance absorption and reduce stomach upset.
- Swallow the tablet whole with water.
- Maintain regular dosing intervals for best results.
- Complete the entire course even if symptoms improve early.
Typical dosing:
- 100 mg twice daily for 5–7 days (uncomplicated UTI)
- 100 mg once daily (preventive therapy for recurrent infections, doctor-directed)
How Urifast 100 mg (Nitrofurantoin) works
Nitrofurantoin interferes with bacterial enzymes involved in metabolism and cell wall formation. This results in the destruction of bacterial DNA, protein and cell walls. Because it concentrates in the urinary tract, it works specifically where infection occurs, making it highly effective for bladder infections.
Safety advice
| Pregnancy | Generally safe during early to mid pregnancy. Avoid near term (weeks 38–42). Consult your doctor before use. |
| Breastfeeding | Small amounts pass into breast milk; avoid if baby has G6PD deficiency. |
| Kidney problems | Not recommended for patients with reduced kidney function (low eGFR). |
| Liver disease | Use with caution; monitor liver function during long-term therapy. |
| G6PD deficiency | May cause hemolysis; avoid unless advised by a specialist. |
What if you forget to take Urifast 100 mg?
Take the missed dose as soon as you remember. If it’s nearly time for the next dose, skip the missed dose. Do not double dose.
All substitutes
Alternatives depend on urine culture results, allergies, and antibiotic resistance. Common substitutes include:
- Fosfomycin 3g sachet
- Trimethoprim–Sulfamethoxazole (if no allergy)
- Ciprofloxacin (used cautiously due to resistance trends)
- Cefalexin (in select cases)
Quick tips
- Drink plenty of water to flush bacteria.
- Avoid alcohol during treatment.
- Urinate frequently; do not hold urine.
- Take with food to reduce stomach side effects.
- Avoid antacids containing magnesium trisilicate.
Fact Box
| Generic Name | Nitrofurantoin |
| Brand | Urifast 100 mg |
| Drug Class | Urinary antibacterial |
| Uses | UTIs, Cystitis |
| Strength | 100 mg |
| Route | Oral |
| Safe With Food | Yes |
Patient concerns
Why doesn’t nitrofurantoin treat kidney infections? Because the drug does not reach sufficient levels in kidney tissue. It’s suitable only for lower UTIs.
How quickly does Urifast work? Most patients feel relief within 24–48 hours.
Can it be used long-term? Sometimes, yes — for UTI prevention — but only with regular monitoring.
User feedback
Are you currently taking Urifast 100 mg (Nitrofurantoin)? Let us know how well it is working for you by taking this survey.
FAQs
Can Urifast 100 mg be stopped when my symptoms are gone?
No. Complete the full course to prevent relapse or antibiotic resistance.
Can the use of Urifast cause dark urine?
Yes, nitrofurantoin may turn urine brownish — this is harmless.
Will Urifast be more effective at a higher dose?
No. Higher doses increase side effects without improving effectiveness.
Storage & disposal instructions
Store in a cool, dry place below 25°C. Keep out of children’s reach. Dispose through pharmacy take-back programs.
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Disclaimer:
This content is for educational purposes only and does not replace medical advice. Always consult a licensed healthcare professional before using Urifast 100 mg (Nitrofurantoin).
References
- Clinical UTI management guidelines
- Nitrofurantoin pharmacology data
- Standard drug reference monographs
Marketer details
GlobalMedShip Pharmacy – support@globalmedship.com – www.globalmedship.com
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Lab tests offered by us
- Urine Routine Test
- Urine Culture & Sensitivity
- Kidney Function Test
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