fo-suz injection - Fosfomycin (4gm) medicine

Fosfotas 4gm Injection: Complete Medicine Guide

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🏭 Suzan Pharma 📦 Varies by brand 💊 Allopathy 📅 Updated: Sep 24, 2026
⚠️ Hepatotoxicity Risk 📋 Prescription Required 💊 Generic Available
Medically Reviewed
11 min read
Evidence: High for complicated urinary tract infections; moderate for other indications.
Reviewed by
SaathiMed Expert Panel | Sep 24, 2026

When to Call Your Doctor IMMEDIATELY

  • Difficulty breathing or swelling of the face, lips, or throat
  • Severe or persistent diarrhea, which may be bloody
  • Signs of a severe allergic reaction, such as a widespread rash or hives
  • Decreased urine output or swelling in the legs
  • Yellowing of the skin or eyes, or dark urine
  • Unusual bleeding or bruising
  • Seizures or severe confusion

If experiencing severe symptoms, call emergency services immediately.

What is fo-suz injection used for?

This medicine is a powerful injectable antibiotic containing fosfomycin (4gm). It is used to treat serious bacterial infections, especially complicated urinary tract infections and those caused by multi-drug resistant bacteria. It works by blocking the formation of the bacterial cell wall, leading to bacterial death. It is administered by a healthcare professional in a hospital setting.

  • Generic Name: Fosfomycin (4gm)
  • Manufacturer: Suzan Pharma
  • Form: Allopathy
  • Pregnancy Category: Consult doctor
  • Prescription Required: Yes

🇮🇳 fo-suz injection के बारे में (Hindi Summary)

उपयोग: यह दवा फॉस्फोमाइसिन (4 ग्राम) इंजेक्शन है, जिसका उपयोग गंभीर बैक्टीरियल संक्रमणों के इलाज के लिए किया जाता है। यह विशेष रूप से जटिल मूत्र मार्ग संक्रमण (यूटीआई), गुर्दे के संक्रमण, और उन संक्रमणों के लिए उपयोगी है जो कई दवाओं के प्रति प्रतिरोधी बैक्टीरिया के कारण होते हैं। यह दवा अस्पताल में डॉक्टर या नर्स द्वारा इंजेक्शन के रूप में दी जाती है। यह बैक्टीरिया की कोशिका भित्ति को तोड़कर उन्हें मार देती है। यह दवा वायरल संक्रमण जैसे सर्दी-जुकाम के लिए प्रभावी नहीं है।

साइड इफेक्ट्स: इस दवा के सामान्य दुष्प्रभावों में मतली, उल्टी, दस्त, सिरदर्द, चक्कर आना, और इंजेक्शन लगाने की जगह पर दर्द या सूजन शामिल हैं। कुछ रोगियों को मुँह में धातु जैसा स्वाद या पेट में असुविधा हो सकती है। गंभीर लेकिन दुर्लभ दुष्प्रभावों में एलर्जी की प्रतिक्रिया, सांस लेने में कठिनाई, चेहरे या गले में सूजन, और गंभीर दस्त शामिल हैं। यदि आपको कोई भी गंभीर लक्षण दिखे तो तुरंत डॉक्टर से संपर्क करें।

सुरक्षा सलाह: यह दवा केवल अस्पताल में डॉक्टर या प्रशिक्षित स्वास्थ्यकर्मी द्वारा ही दी जानी चाहिए। अपने डॉक्टर को अपनी सभी दवाओं और एलर्जी के बारे में बताएं। गुर्दे की बीमारी होने पर खुराक कम करनी पड़ सकती है, इसलिए गुर्दे की कार्यप्रणाली की निगरानी की जाएगी। गर्भवती या स्तनपान कराने वाली महिलाएं डॉक्टर से सलाह लें। इलाज के दौरान शराब न पिएं। कोई भी नया लक्षण जैसे गंभीर दस्त, दाने, या सांस लेने में कठिनाई हो तो तुरंत डॉक्टर को बताएं।

💡 Did You Know? The Indian pharmaceutical market is expected to reach $130 billion by 2030.

💊 fo-suz injection Uses & Benefits

  • [{"condition":"Complicated urinary tract infections","description":"This medicine is used to treat complicated UTIs, including pyelonephritis, caused by susceptible bacteria such as E.
  • coli and Enterococcus faecalis.","evidence":"Well-established"},{"condition":"Multi-drug resistant bacterial infections","description":"It is effective against certain multi-drug resistant Gram-negative and Gram-positive bacteria, including ESBL-producing organisms.","evidence":"Well-established"},{"condition":"Bone and joint infections","description":"Used as part of combination therapy for osteomyelitis and septic arthritis caused by susceptible organisms.","evidence":"Moderate"},{"condition":"Nosocomial infections","description":"May be used for hospital-acquired infections such as ventilator-associated pneumonia or bloodstream infections when other options are limited.","evidence":"Limited"}]

Off-label uses: [{"condition":"Prostatitis","description":"Sometimes used off-label for chronic bacterial prostatitis caused by resistant organisms.","evidence":"Limited"},{"condition":"Meningitis","description":"Rarely used off-label as part of combination therapy for meningitis caused by resistant bacteria.","evidence":"Limited"}]

Primary treatment for: Complicated urinary tract infections

Also treats: Pyelonephritis, Multi-drug resistant bacterial infections, Bone and joint infections, Nosocomial infections

📋 Drug Information

Generic Name(s)Fosfomycin (4gm)
Brand Namefo-suz injection
ManufacturerSuzan Pharma
Packaging / FormVaries by brand (Allopathy)
Therapeutic ClassANTI INFECTIVES
Action ClassCell wall synthesis inhibitor- UTI
Route of AdministrationParenteral (intravenous or intramuscular)
StorageStore the unreconstituted powder at room temperature (15-30°C). After reconstitution, the solution should be used immediately or stored as directed by the manufacturer. Protect from light and moisture.
Shelf Life24 months from the date of manufacture for the unreconstituted powder. After reconstitution, use within the time specified by the manufacturer, typically within 24 hours if refrigerated.
WHO GuidelineThe World Health Organization includes fosfomycin in its list of essential medicines for the treatment of urinary tract infections and other susceptible infections. It is recommended as an alternative for multi-drug resistant infections.
ICMR GuidelineThe Indian Council of Medical Research recognizes fosfomycin as a reserve antibiotic for the treatment of complicated urinary tract infections and multi-drug resistant Gram-negative infections, to be used under antimicrobial stewardship.

👨‍⚕️ Doctor's Practical Tips

Evidence-based practical advice from experienced clinicians

1
Always reconstitute fosfomycin powder with the recommended diluent and use immediately.
2
Administer the injection slowly over 5-10 minutes to minimize injection site reactions.
3
Adjust the dose based on creatinine clearance, especially in elderly patients.
4
Monitor renal function before and during therapy, particularly if used with other nephrotoxic drugs.
5
Watch for signs of superinfection, such as oral thrush or C. difficile diarrhea.
6
Educate patients about the importance of completing the full course of therapy.
7
Use fosfomycin judiciously to prevent resistance, reserving it for appropriate indications.

🔍 Is This Medicine Right for Your Symptom?

Educational reference. Always consult a doctor for diagnosis.

Burning sensation during urination
This medicine is commonly prescribed for complicated urinary tract infections.
Likely Use
Fever with flank pain
This medicine is used for kidney infections (pyelonephritis).
Likely Use
Common cold
This medicine is not effective against viral infections.
Not Primary
Skin rash
This medicine is not used for skin infections unless caused by susceptible bacteria and given systemically.
Not Primary

🔬 How This Medicine Works (Pharmacology)

Pharmacokinetics

AbsorptionThis medicine is administered intravenously or intramuscularly, so absorption is not applicable in the same way as oral medicines. After intravenous administration, it achieves high plasma concentrations rapidly. Intramuscular administration results in slightly slower absorption but is still well absorbed.
DistributionThis medicine distributes widely into body tissues and fluids, including the kidneys, bladder wall, prostate, and bone. It crosses the placenta and is excreted in breast milk. It has a low protein binding capacity.
Protein BindingVery low (less than 5%)
MetabolismThis medicine is not metabolized in the body and is excreted unchanged.
Half-LifeApproximately 2 to 4 hours in patients with normal kidney function. The half-life is prolonged in patients with renal impairment.
ExcretionThis medicine is primarily excreted unchanged in the urine through glomerular filtration. Up to 90% of a dose is recovered in the urine within 24 hours.
BioavailabilityNot applicable for intravenous administration. For intramuscular administration, bioavailability is approximately 90%.
Onset of ActionRapid bacterial killing begins within 1 to 2 hours after intravenous administration.
Peak Plasma TimeImmediately after intravenous infusion; approximately 1 to 2 hours after intramuscular injection.
Duration of ActionThe antibacterial effect lasts for approximately 12 to 24 hours, depending on the dose and renal function.

How It Works

This medicine works by inhibiting the enzyme enolpyruvyl transferase, also known as MurA, which is responsible for the first committed step in the synthesis of peptidoglycan, an essential component of the bacterial cell wall. By blocking this step, the bacteria cannot build a proper cell wall, leading to cell lysis and death. This mechanism is unique among antibiotics, which means there is minimal cross-resistance with other antibiotic classes. It is bactericidal and effective against a broad range of Gram-positive and Gram-negative bacteria.

Mechanism Steps

1
Entry into bacteria: This medicine enters the bacterial cell through active transport systems, including the glycerol-3-phosphate transporter and the hexose phosphate transporter.
2
Irreversible inhibition of MurA: Once inside, it irreversibly binds to and inhibits the MurA enzyme, which catalyzes the transfer of enolpyruvate from phosphoenolpyruvate to UDP-N-acetylglucosamine.
3
Blockade of peptidoglycan synthesis: This inhibition prevents the formation of the peptidoglycan precursor, leading to a weakened cell wall.
4
Bacterial cell lysis: Without a proper cell wall, the bacteria cannot withstand osmotic pressure and undergo lysis, resulting in bacterial death.

💡 How to Take fo-suz injection

Strength: Fosfomycin 4gm injection (powder for reconstitution)

1This medicine is given by a healthcare professional as an intravenous or intramuscular injection.
2The powder is reconstituted with sterile water or saline before administration.
3The injection is usually given slowly over 5 to 10 minutes to reduce injection site reactions.
4Do not self-administer this medicine.
5Follow your healthcare provider's instructions regarding the frequency and duration of treatment.

Dosage Information

Adult DosageThe usual adult dose of this medicine is 4 grams administered intravenously or intramuscularly every 12 hours for serious infections, or as a single 4-gram dose for uncomplicated urinary tract infections. For complicated infections, the dose may be repeated every 12 to 24 hours. The dose must be individualized by a qualified clinician based on indication, age, weight, renal and hepatic function.
Pediatric DosagePediatric dosing is not established from available information. Consult a pediatrician.
Elderly DosageElderly patients may have reduced renal function, so the dose should be adjusted based on creatinine clearance. Monitor renal function closely during treatment.
Renal ImpairmentIn patients with renal impairment, the dose of this medicine must be reduced. For creatinine clearance between 20-40 mL/min, the dose may be reduced to 2 grams every 12 hours. For creatinine clearance below 20 mL/min, the dose may be reduced to 2 grams every 24 hours. For patients on hemodialysis, a dose of 2 grams after each dialysis session is recommended. Always consult a clinician for precise dosing.
Hepatic ImpairmentNo specific dose adjustment is required for hepatic impairment, as fosfomycin is not metabolized by the liver. However, monitor liver function in patients with pre-existing liver disease.
Maximum Daily DoseThe maximum recommended daily dose is 8 grams (4 grams every 12 hours) for adults with normal renal function. Doses should not exceed this without careful clinical justification.

Dosage Timeline

🌅 Morning ❌ ☀️ Afternoon ❌ 🌆 Evening ❌ 🌙 Night ❌

🍽️ Food Timing Guide

With food
No specific food restrictions
This medicine is given intravenously, so food does not affect its absorption.
Alcohol
Avoid
May increase risk of liver toxicity and worsen side effects.

⏰ What to Do If You Miss a Dose

📌 Less than half the dosing interval has passed
→ Take the missed dose as soon as you remember.
💡 Continue with the regular schedule.
📌 More than half the dosing interval has passed
→ Skip the missed dose.
💡 Do not double dose to catch up.

⚠️ Side Effects of fo-suz injection

✅ Common Side Effects

Nausea (Common (1-10%))
Usually resolves on its own. Inform your doctor if it persists or is severe.
Diarrhea (Common (1-10%))
Stay hydrated. If diarrhea is severe or bloody, contact your doctor immediately.
Headache (Common (1-10%))
Rest and stay hydrated. Consult your doctor if it persists.
Injection site pain (Common (1-10%))
Apply a cold compress if needed. Report severe pain or swelling to your nurse or doctor.
Vomiting (Uncommon (0.1-1%))
Inform your doctor if vomiting occurs, as it may affect hydration and electrolyte balance.

🚨 Serious Side Effects

Anaphylaxis (Rare (<0.1%))
Seek immediate medical attention if you experience difficulty breathing, swelling of the face or throat, or a sudden drop in blood pressure.
Clostridioides difficile-associated diarrhea (Rare (<0.1%))
Report severe or persistent diarrhea to your doctor immediately. Do not self-treat with anti-diarrheal medicines.
Severe skin reactions (e.g., Stevens-Johnson syndrome) (Very rare (<0.01%))
Seek immediate medical attention if you develop a rash, blisters, or peeling skin.
Liver enzyme elevation (Rare (<0.1%))
Your doctor may monitor liver function. Report yellowing of eyes or skin, or dark urine.

⚠️ Rare Side Effects

Blood dyscrasias (e.g., leukopenia, thrombocytopenia)
Report unusual bruising or bleeding, or signs of infection.
Seizures
Seek immediate medical attention if seizures occur.

Consult your doctor if you experience any unusual symptoms.

🔬 Drug Interactions

Drug Severity Effect
Aminoglycosides Major
Warfarin Moderate
Metoclopramide Moderate
Probenecid Moderate
Loop diuretics Moderate

🚨 Major Interactions

  • Other nephrotoxic drugs (e.g., aminoglycosides, amphotericin B)
  • Warfarin

⚡ Moderate Interactions

  • Metoclopramide
  • Probenecid

🍷 Alcohol Interaction

Alcohol should be avoided while receiving this medicine because it can increase the risk of liver toxicity and worsen side effects such as nausea, vomiting, and dizziness. It may also reduce the effectiveness of the antibiotic and delay recovery.

🔎 Check Your Other Medicines

Educational tool. Always confirm with your doctor or pharmacist.

🛡️ Safety & Warnings

🚫 Contraindications

["Known hypersensitivity to fosfomycin or any component of the formulation","Severe renal impairment (creatinine clearance

⚠️ Warnings & Precautions

["Administer only under medical supervision.","Adjust dose in patients with renal impairment.","Monitor for superinfections, including C. difficile-associated diarrhea.","Use with caution in patients with a history of seizures.","May cause false-positive results in certain urine glucose tests.","Avoid concurrent use with other nephrotoxic drugs if possible.","Inform patients about the risk of allergic reactions."]

🤱 Lactation Safety

Fosfomycin is excreted in human breast milk in low amounts. It is generally considered compatible with breastfeeding, but monitor the infant for diarrhea or thrush. Consult your doctor before breastfeeding while on this medicine.

💊 Overdose Management

Overdose of this medicine may cause severe gastrointestinal symptoms, electrolyte imbalance, and renal impairment. There is no specific antidote. Treatment is supportive and symptomatic. Hemodialysis may be considered to remove fosfomycin from the blood in cases of severe overdose, especially in patients with renal failure.

⏰ Missed Dose

Since this medicine is administered by a healthcare professional, missed doses are unlikely. If a dose is missed, it should be given as soon as possible. If it is almost time for the next dose, skip the missed dose and continue with the regular schedule. Do not double the dose.

Additional Safety Advice

General Safety

This medicine must only be given by a healthcare professional in a setting where emergency equipment is available. Inform your doctor if you are allergic to fosfomycin or any other antibiotics. Tell your doctor about all other medicines you are taking, especially other antibiotics, blood thinners, or medicines that affect kidney function. Your kidney function will be checked before and during treatment because the dose needs adjustment in kidney disease. Do not attempt to self-administer this injection. If you are pregnant or breastfeeding, discuss the risks and benefits with your doctor. Avoid alcohol during treatment as it may worsen side effects. Report any new symptoms such as severe diarrhea, rash, or difficulty breathing immediately.

👴 Special Considerations for Elderly

💡 For Patients Above 65

Elderly patients are more likely to have reduced kidney function, which can increase the risk of side effects. Dose adjustment based on creatinine clearance is essential. Monitor renal function closely and watch for signs of confusion or falls.

🤰 Pregnancy Planning (TTC)

If you are planning to become pregnant, discuss with your doctor before receiving this medicine. Fosfomycin is generally considered safe in pregnancy, but the need for treatment should be carefully evaluated. Use effective contraception if advised.

🏥 Post-Surgery Considerations

This medicine may be used to treat or prevent surgical site infections caused by susceptible bacteria. It is often given perioperatively in certain surgeries. Follow your surgeon's instructions regarding its use.

🦷 Dental Procedures

If you are scheduled for dental work, inform your dentist that you are receiving this medicine. No specific precautions are typically needed, but good oral hygiene is important to prevent infections.

💚 Lifestyle Tips for Better Results

🏃
Stay well hydrated to help flush out bacteria from the urinary tract.
🥗
Urinate frequently and completely to prevent bacterial buildup.
😴
Maintain good genital hygiene.
💧
Avoid caffeine and alcohol, which can irritate the bladder.
🧘
Include probiotic-rich foods like yogurt to maintain gut health.
🌞
Get adequate rest to support your immune system.
🚭
Follow up with your doctor for repeat cultures if needed.

🏋️ Exercise Considerations

While on this medicine, you may feel tired or dizzy. Avoid strenuous exercise until you feel fully recovered. Light activities like walking are fine, but listen to your body and rest when needed.

🥗 Diet Recommendations

Drink plenty of water and fluids.
Eat a balanced diet rich in fruits and vegetables.
Include probiotic foods to prevent antibiotic-associated diarrhea.
Avoid spicy and acidic foods that may irritate the bladder.
Limit caffeine and alcohol.

💼 Impact on Daily Work & Life

This medicine is given in a hospital setting, so you may need to take time off work during treatment. You may experience fatigue, dizziness, or nausea, which can affect your ability to drive or operate machinery. Avoid driving until you know how the medicine affects you. Most people can resume normal activities after completing treatment and feeling better.

🛑 When to Stop This Medicine

Do not stop this medicine without consulting your doctor. The full course must be completed to ensure the infection is fully treated and to prevent resistance. If you experience severe side effects, your doctor may decide to stop the medicine and switch to an alternative. Always follow your healthcare provider's instructions.

📅 Long-Term Use Effects

Long-term use of this medicine is not common, as it is typically used for short courses. Prolonged use may lead to bacterial resistance, superinfections, and rarely, blood dyscrasias or liver enzyme elevations. Regular monitoring of renal and liver function is advised if extended therapy is necessary. Discontinue if severe adverse effects occur.

🌿 Non-Medicine Approaches

These can complement medicine but do not replace prescribed treatment.

Oral antibiotics

For less severe infections, oral antibiotics may be used instead of injectable fosfomycin.

Evidence: Well-established
Other injectable antibiotics

Depending on the bacteria and susceptibility, other injectable antibiotics like meropenem or colistin may be used.

Evidence: Well-established
Phage therapy

Experimental approach for multi-drug resistant infections, not widely available.

Evidence: Limited

💉 Vaccination Considerations

💉 If You're Getting Vaccinated

There are no specific vaccine interactions with this medicine. However, if you are due for any vaccinations, inform your doctor, as antibiotics may affect the immune response to certain live vaccines. Generally, inactivated vaccines can be given safely.

📦 Storage Guide

✅ DO

Store the unreconstituted powder at room temperature (15-30°C)

❌ DON'T

Do not freeze the powder

✅ DO

Keep in the original container until use

❌ DON'T

Do not transfer to unmarked containers

✅ DO

Protect from light and moisture

❌ DON'T

Do not store in bathroom cabinet

✅ DO

Use reconstituted solution immediately or as directed

❌ DON'T

Do not use if the solution is cloudy or contains particles

✈️ Traveling with This Medicine

When traveling with this medicine, carry it in its original packaging with the prescription label clearly visible. Bring a copy of your prescription and a letter from your doctor explaining the medical need. Keep the medicine in your carry-on luggage to avoid temperature extremes in checked baggage. If you need to store it, ensure it is kept at room temperature and protected from light. Check the customs regulations of your destination country regarding injectable antibiotics. If you are traveling across time zones, consult your doctor about adjusting the dosing schedule.

💰 Cost Analysis & Savings

👥 Real Patient Stories

Educational, anonymized scenarios. Individual results may vary.

👤 A 65-year-old man with a complicated urinary tract infection caused by ESBL-producing E. coli
He was admitted to the hospital with high fever and flank pain. He was started on fosfomycin 4gm injection every 12 hours. After 3 days, his fever subsided and his urine culture became negative. He completed a 7-day course and recovered fully. He was advised to stay hydrated and follow up with his urologist.
💡 Lesson: Fosfomycin injection can be effective for serious infections caused by resistant bacteria when administered promptly and appropriately.
👤 A 45-year-old woman with a history of recurrent UTIs and penicillin allergy
She developed a severe kidney infection and was hospitalized. Due to her allergy, she was given fosfomycin 4gm injection. She experienced mild nausea but no allergic reaction. Her infection resolved after 5 days of treatment. She was educated on preventive measures for UTIs.
💡 Lesson: Fosfomycin is a valuable alternative for patients allergic to penicillins, but monitoring for side effects is important.

💬 Questions Patients Often Ask

Q: How long does it take for this medicine to work?

A: This medicine starts killing bacteria within 1-2 hours after administration. However, you may not feel better immediately. Fever and other symptoms usually improve within 2-3 days. Complete the full course as prescribed.

Q: Can I take this medicine at home?

A: No, this medicine must be given by a healthcare professional in a hospital or clinic setting. It requires proper reconstitution and administration, and monitoring for side effects.

Q: What should I do if I experience side effects?

A: Mild side effects like nausea or headache usually go away on their own. If you experience severe diarrhea, rash, difficulty breathing, or any other serious symptom, inform your doctor immediately.

Q: Is this medicine safe during pregnancy?

A: Fosfomycin is generally considered safe during pregnancy when clearly needed. However, you should discuss the risks and benefits with your doctor before receiving this medicine.

Q: Can this medicine be used for children?

A: Pediatric dosing is not well established. Consult a pediatrician for appropriate dosing and use.

🤔 Common Patient Concerns

💭 These are the concerns patients most commonly raise

  • Can I take this medicine if I have kidney disease?
  • Will this medicine affect my liver?
  • Can I breastfeed while on this medicine?
  • How long will I need to stay in the hospital?
  • What if I miss a dose?
  • Can I drink alcohol while on this medicine?
  • Does this medicine interact with my blood pressure medicines?
  • Is this medicine safe for children?

🔄 Substitutes for fo-suz injection

View All

Alternative brands with exact same active ingredient:

Medical Note: Always consult your doctor before switching medications.

🛑 Myths vs. Facts

  • Myth: Fosfomycin injection is a painkiller.
    Fact: Fosfomycin is an antibiotic, not a painkiller. It treats bacterial infections but does not directly relieve pain.
  • Myth: Fosfomycin can be used for viral infections like the flu.
    Fact: Fosfomycin is only effective against bacterial infections. It has no effect on viruses.
  • Myth: Fosfomycin is safe to self-administer at home.
    Fact: Fosfomycin injection must be given by a healthcare professional in a clinical setting due to the risk of serious side effects and the need for proper administration.
  • Myth: Fosfomycin is a first-line antibiotic for all infections.
    Fact: Fosfomycin is typically reserved for specific infections, especially those caused by multi-drug resistant bacteria, and is not a first-line treatment for common infections.

🔄 Alternative Options

Generic Alternatives

  • Fosfomycin 4gm injection

Brand Alternatives

  • Fosfotas 4gm injection

📊 Comparison with Similar Medicines

[{"medicine":"Fosfomycin","class":"Phosphonic acid derivative","route":"Parenteral","spectrum":"Broad-spectrum, including MDR","typical_use":"Complicated UTI, MDR infections"},{"medicine":"Meropenem","class":"Carbapenem","route":"Parenteral","spectrum":"Broad-spectrum","typical_use":"Serious infections"},{"medicine":"Colistin","class":"Polymyxin","route":"Parenteral","spectrum":"Gram-negative MDR","typical_use":"MDR infections"}]

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