Tosgyl 400mg Tablet - Metronidazole (400mg) medicine

Flagyl 400 Tablet: Complete Medicine Guide

No reviews yet
🏭 TOSC International Pvt Ltd 📦 strip of 10 tablets 💊 Allopathy 📅 Updated: Oct 16, 2026
📋 Prescription Required 💊 Generic Available
Medically Reviewed
11 min read
Evidence: Well-established for approved indications.
Reviewed by
SaathiMed Expert Panel | Oct 16, 2026
🩺
Medically Fact-Checked & Clinically Verified by SaathiMed Clinical Review Board
Clinical Reference Standards: CDSCO (Central Drugs Standard Control Organisation), Indian Pharmacopoeia (IP) & WHO | Last Updated: September 2026

When to Call Your Doctor IMMEDIATELY

  • Severe allergic reaction with swelling of the face, lips, or throat, or difficulty breathing.
  • Seizures or convulsions.
  • Numbness, tingling, or burning in the hands or feet.
  • Unusual bruising or bleeding, fever, or sore throat.
  • Severe abdominal pain, especially with nausea and vomiting.
  • Yellowing of the skin or eyes, or dark urine.
  • Confusion, disorientation, or difficulty speaking.
  • Sudden vision changes or loss of vision.

If experiencing severe symptoms, call emergency services immediately.

What is Tosgyl 400mg Tablet used for?

This medicine contains metronidazole 400 mg, an antibiotic used to treat anaerobic bacterial and protozoal infections such as bacterial vaginosis, trichomoniasis, amoebiasis, and giardiasis. It works by damaging microbial DNA. It is taken orally, usually two to three times daily with food. Alcohol must be strictly avoided during and for 48 hours after treatment.

  • Generic Name: Metronidazole (400mg)
  • Manufacturer: TOSC International Pvt Ltd
  • Form: Allopathy
  • Pregnancy Category: Consult doctor
  • Prescription Required: Yes

🇮🇳 Tosgyl 400mg Tablet के बारे में (Hindi Summary)

उपयोग: यह दवा मेट्रोनिडाजोल 400 मिलीग्राम युक्त एक एंटीबायोटिक टैबलेट है। इसका उपयोग एनारोबिक बैक्टीरिया और कुछ परजीवियों के कारण होने वाले संक्रमणों के इलाज के लिए किया जाता है, जैसे बैक्टीरियल वेजिनोसिस, ट्राइकोमोनिएसिस, अमीबiasis, और जिआर्डiasis। यह दवा संक्रमण पैदा करने वाले सूक्ष्मजीवों के डीएनए को नष्ट करके उन्हें मरने में मदद करती है। इसे डॉक्टर के निर्देशानुसार भोजन के साथ लेना चाहिए। इस दवा को लेते समय और आखिरी खुराक के 48 घंटे बाद तक शराब का सेवन बिल्कुल न करें, क्योंकि इससे गंभीर प्रतिक्रिया हो सकती है।

साइड इफेक्ट्स: इस दवा के सामान्य दुष्प्रभावों में मतली, मुँह में धातु जैसा स्वाद, सिरदर्द, और पेट में असुविधा शामिल हैं। कुछ लोगों को भूख न लगना, दस्त, या कब्ज हो सकती है। पेशाब का रंग गहरा हो सकता है, जो आमतौर पर हानिरहित होता है। दुर्लभ मामलों में गंभीर एलर्जी, रक्त विकार, हाथ-पैरों में झुनझुनी, या दौरे पड़ सकते हैं। यदि आपको कोई असामान्य लक्षण महसूस हो, तो तुरंत डॉक्टर से संपर्क करें।

सुरक्षा सलाह: इस दवा को डॉक्टर के बताए अनुसार ही लें, भोजन के साथ लेना बेहतर है ताकि पेट की परेशानी कम हो। इलाज के दौरान और आखिरी खुराक के 48 घंटे बाद तक शराब न पिएं। कोर्स पूरा करें, भले ही आप बेहतर महसूस करने लगें। यदि आपको लीवर, किडनी, रक्त, या तंत्रिका तंत्र की कोई बीमारी है, तो डॉक्टर को बताएं। गर्भवती या स्तनपान कराने वाली महिलाएं डॉक्टर से सलाह लें। दवा को बच्चों की पहुंच से दूर रखें।

💡 Did You Know? India has the highest number of USFDA-compliant plants outside the USA.

💊 Tosgyl 400mg Tablet Uses & Benefits

  • [{"condition":"Bacterial vaginosis","description":"This medicine is effective against the anaerobic bacteria that cause bacterial vaginosis, helping to restore the normal vaginal flora and relieve symptoms such as discharge and odour.","evidence":"Well-established"},{"condition":"Trichomoniasis","description":"It is a first-line treatment for trichomoniasis, a sexually transmitted infection caused by Trichomonas vaginalis.
  • Sexual partners should also be treated to prevent reinfection.","evidence":"Well-established"},{"condition":"Amoebiasis (amoebic dysentery)","description":"This medicine is used to treat intestinal and extra-intestinal amoebiasis caused by Entamoeba histolytica, helping to clear the parasite and resolve symptoms such as bloody diarrhoea and abdominal pain.","evidence":"Well-established"},{"condition":"Giardiasis","description":"It is a preferred treatment for giardiasis, an intestinal infection caused by Giardia lamblia, which leads to diarrhoea, bloating, and malabsorption.","evidence":"Well-established"},{"condition":"Anaerobic bacterial infections","description":"This medicine is used for a range of anaerobic infections, including intra-abdominal infections, pelvic infections, skin and soft tissue infections, and brain abscesses, often in combination with other antibiotics.","evidence":"Well-established"},{"condition":"Helicobacter pylori eradication","description":"It is a component of combination regimens used to eradicate Helicobacter pylori, the bacterium associated with peptic ulcers and gastric cancer.","evidence":"Well-established"},{"condition":"Surgical prophylaxis","description":"This medicine may be used before certain colorectal or gynaecological surgeries to prevent postoperative anaerobic infections.","evidence":"Well-established"}]

Off-label uses: [{"condition":"Rosacea","description":"Topical or oral metronidazole is sometimes used off-label for inflammatory rosacea, although the oral form is not approved for this indication in many countries.","evidence":"Limited"},{"condition":"Crohn's disease","description":"Metronidazole has been studied as an off-label treatment for perianal Crohn's disease and for preventing recurrence after surgery, but evidence is limited and it is not a standard first-line therapy.","evidence":"Limited"},{"condition":"Bacterial overgrowth in the small intestine","description":"It may be used off-label for small intestinal bacterial overgrowth, but other antibiotics are generally preferred.","evidence":"Limited"}]

Primary treatment for: Anaerobic bacterial and protozoal infections

Also treats: Bacterial vaginosis, Trichomoniasis, Amoebiasis, Giardiasis, Intra-abdominal infections, Pelvic inflammatory disease, Helicobacter pylori infection

📋 Drug Information

Generic Name(s)Metronidazole (400mg)
Brand NameTosgyl 400mg Tablet
ManufacturerTOSC International Pvt Ltd
Packaging / Formstrip of 10 tablets (Allopathy)
Therapeutic Class
Action Class
Route of AdministrationOral
StorageStore at room temperature between 15°C and 30°C, away from direct sunlight and moisture. Keep in the original container.
Shelf LifeTypically 24 to 36 months from the date of manufacture, depending on the manufacturer. Check the expiry date on the packaging.
WHO GuidelineThe World Health Organization includes metronidazole in its essential medicines list and recommends it for the treatment of amoebiasis, giardiasis, trichomoniasis, and bacterial vaginosis. Specific regimens should follow national guidelines.
ICMR GuidelineThe Indian Council of Medical Research recommends metronidazole for the treatment of amoebiasis, giardiasis, trichomoniasis, and anaerobic infections. It is also included in standard treatment guidelines for bacterial vaginosis and Helicobacter pylori eradication.

👨‍⚕️ Doctor's Practical Tips

Evidence-based practical advice from experienced clinicians

1
Always take this medicine with food or milk to reduce the chance of nausea and stomach upset.
2
Strictly avoid alcohol during treatment and for at least 48 hours after the last dose to prevent a disulfiram-like reaction.
3
Complete the full course as prescribed, even if you feel better after a few days, to prevent the infection from returning.
4
Inform your doctor if you have liver disease, kidney disease, or a history of seizures before starting this medicine.
5
Report any numbness, tingling, or weakness in your hands or feet immediately, as this may indicate peripheral neuropathy.
6
If you are taking warfarin or lithium, your doctor will need to monitor your blood levels closely during treatment.
7
Do not share this medicine with others, even if they have similar symptoms, as it may not be appropriate for them.

🔍 Is This Medicine Right for Your Symptom?

Educational reference. Always consult a doctor for diagnosis.

✅
Vaginal discharge with odour
This medicine is commonly prescribed for bacterial vaginosis.
Likely Use
✅
Bloody diarrhoea with abdominal pain
This medicine is used for amoebic dysentery.
Likely Use
✅
Watery diarrhoea and bloating
This medicine is used for giardiasis.
Likely Use
❌
Fever
This medicine is not a primary fever reducer.
Not Primary
❌
Common cold
This medicine is not effective against viral infections.
Not Primary

🔬 How This Medicine Works (Pharmacology)

Pharmacokinetics

AbsorptionThis medicine is rapidly and almost completely absorbed after oral administration. Food may slightly delay the rate of absorption but does not significantly reduce the total amount absorbed.
DistributionMetronidazole distributes widely into most body tissues and fluids, including saliva, breast milk, cerebrospinal fluid, and abscess cavities. It crosses the placenta and reaches therapeutic concentrations in the central nervous system.
Protein BindingLess than 20% of metronidazole is bound to plasma proteins.
MetabolismMetronidazole is metabolized in the liver by cytochrome P450 enzymes, mainly CYP2C9 and CYP3A4, to several metabolites including hydroxy metabolite and acidic metabolite. The hydroxy metabolite has some antimicrobial activity.
Half-LifeThe elimination half-life of metronidazole is approximately 8 hours in adults with normal liver function. It may be prolonged in patients with severe liver disease.
ExcretionMetronidazole and its metabolites are excreted primarily in the urine, with about 60-80% of a dose appearing in urine and 6-15% in faeces. Renal clearance accounts for a significant portion of elimination.
BioavailabilityThe oral bioavailability of metronidazole is approximately 80-100%.
Onset of ActionThe onset of antimicrobial action begins within 1-2 hours after oral administration, but clinical improvement may take 24-48 hours depending on the infection.
Peak Plasma TimePeak plasma concentrations are reached approximately 1-2 hours after oral administration on an empty stomach.
Duration of ActionThe antimicrobial effect persists for approximately 8-12 hours after a single dose, which supports dosing every 8 hours for most indications.

How It Works

This medicine works by entering susceptible anaerobic bacteria and protozoa, where it is reduced by ferredoxin-like electron transport proteins to form reactive nitro radical anions. These reactive metabolites bind to and damage microbial DNA, causing strand breakage and inhibiting nucleic acid synthesis. This leads to rapid loss of helical structure, impaired replication, and eventual cell death. Because the activation occurs only in low-oxygen environments, the medicine is selectively toxic to anaerobic organisms and has little effect on human cells or aerobic bacteria.

Mechanism Steps

1
Entry into microbial cell: This medicine diffuses into anaerobic bacteria and protozoa because these organisms lack efficient oxygen-based exclusion mechanisms.
2
Reductive activation: Inside the low-oxygen environment of the cell, the nitro group of metronidazole is reduced by ferredoxin-like electron transport proteins to form reactive nitro radical anions.
3
DNA damage: The reactive metabolites bind to microbial DNA, causing strand breakage and inhibiting DNA replication and transcription.
4
Cell death: The cumulative DNA damage leads to loss of cell viability and death of the susceptible organism.

💡 How to Take Tosgyl 400mg Tablet

Strength: This medicine is available as an immediate-release tablet containing 400 mg of metronidazole.

1Take this medicine exactly as prescribed by your doctor.
2Swallow the tablet whole with a full glass of water.
3Take it with food or milk to reduce stomach upset.
4Do not crush, chew, or break the tablet unless advised by your doctor.
5Take it at evenly spaced intervals to maintain consistent blood levels.
6Complete the full course even if you start feeling better.
7Avoid alcohol during treatment and for 48 hours after the last dose.

Dosage Information

Adult DosageThe usual adult dose of this medicine is 400 mg taken two to three times daily, depending on the infection being treated. For bacterial vaginosis, a common regimen is 400 mg twice daily for 7 days. For trichomoniasis, a single 2 g dose or a 7-day course may be used. For amoebiasis, the dose is often 400-800 mg three times daily for 5-10 days. For anaerobic infections, 400 mg three times daily is typical. 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 for appropriate dosing in children.
Elderly DosageElderly patients may be more sensitive to the side effects of this medicine, especially neurological effects. Dose adjustment may be needed based on liver and kidney function. Consult a doctor for personalised dosing.
Renal ImpairmentDose adjustment is generally not required in mild to moderate renal impairment. In severe renal impairment, caution is advised and dose reduction may be considered. Consult a doctor for personalised dosing.
Hepatic ImpairmentIn patients with severe liver disease, the dose of this medicine may need to be reduced because metronidazole is metabolised in the liver. Monitor liver function and adjust dose as advised by a clinician.
Maximum Daily DoseThe maximum recommended daily dose is 2 g (2000 mg) for most indications, but higher doses may be used in specific situations under medical supervision.

Dosage Timeline

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

🍽️ Food Timing Guide

With food
Take with meals
Reduces stomach upset and nausea.
Alcohol
Avoid completely
Can cause a severe disulfiram-like reaction.
Water
Drink plenty
Helps maintain hydration and supports kidney function.

⏰ 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 Tosgyl 400mg Tablet

✅ Common Side Effects

Nausea (Common (up to 10%))
Take the medicine with food or milk to reduce nausea. If it persists, consult your doctor.
Metallic taste (Common (up to 10%))
This usually resolves after finishing the course. Chewing sugar-free gum or rinsing with water may help.
Headache (Common (5-10%))
Rest and stay hydrated. If the headache is severe or persistent, contact your doctor.
Stomach discomfort (Common (5-10%))
Take with meals. Avoid spicy or fatty foods until the discomfort settles.
Dark urine (Common (up to 10%))
This is harmless and resolves after stopping the medicine. Drink plenty of water.

🚨 Serious Side Effects

Peripheral neuropathy (Rare (<1%))
Report numbness, tingling, or burning in the hands or feet to your doctor immediately. The medicine may need to be stopped.
Seizures (Rare (<0.1%))
Seek emergency medical attention if you experience a seizure or convulsion.
Severe allergic reaction (anaphylaxis) (Rare (<0.1%))
Call emergency services if you develop swelling of the face, lips, or throat, difficulty breathing, or a widespread rash.
Blood disorders (e.g., neutropenia, thrombocytopenia) (Rare (<0.1%))
Report unusual bruising, bleeding, fever, or sore throat to your doctor promptly. Blood tests may be needed.
Encephalopathy (Very rare (<0.01%))
Seek immediate medical attention if you experience confusion, disorientation, or difficulty speaking.

⚠️ Rare Side Effects

Pancreatitis
Seek immediate medical attention if you develop severe upper abdominal pain that radiates to your back, with nausea and vomiting.
Optic neuropathy
Report any sudden vision changes, blurred vision, or loss of vision to your doctor immediately.
Aseptic meningitis
Seek emergency care if you experience severe headache, stiff neck, fever, and sensitivity to light.
Stevens-Johnson syndrome
Stop the medicine and seek emergency care if you develop a painful rash with blisters, peeling skin, or sores in the mouth or eyes.

Consult your doctor if you experience any unusual symptoms.

🔬 Drug Interactions

Drug Severity Effect
Warfarin Major
Alcohol Major
Lithium Major
Disulfiram Major
Phenytoin Moderate
Cimetidine Moderate
Carbamazepine Moderate
Cyclosporine Moderate
Fluorouracil Moderate
Tacrolimus Moderate

🚨 Major Interactions

  • Warfarin
  • Alcohol
  • Lithium
  • Disulfiram
  • Phenytoin

⚡ Moderate Interactions

  • Cimetidine
  • Carbamazepine
  • Cyclosporine
  • Fluorouracil
  • Tacrolimus

🍷 Alcohol Interaction

Alcohol must be strictly avoided while taking this medicine and for at least 48 hours after the last dose. Combining alcohol with metronidazole can cause a disulfiram-like reaction characterised by flushing, severe nausea, vomiting, headache, and rapid heartbeat. This reaction can be dangerous and requires immediate medical attention if it occurs.

🔎 Check Your Other Medicines

Educational tool. Always confirm with your doctor or pharmacist.

🛡️ Safety & Warnings

🚫 Contraindications

["Known hypersensitivity to metronidazole or other nitroimidazole derivatives","First trimester of pregnancy for certain indications, unless clearly needed","Use of disulfiram within the past two weeks","Alcohol consumption during and for 48 hours after therapy","Severe liver disease with caution","Central nervous system disorders with caution"]

⚠️ Warnings & Precautions

["Avoid alcohol during treatment and for at least 48 hours after the last dose.","May cause peripheral neuropathy, especially with prolonged use. Report numbness or tingling.","May cause seizures, particularly in patients with a history of seizures or CNS disease.","Can cause dark urine, which is harmless.","May increase the risk of bleeding in patients taking warfarin.","Can cause superinfections such as oral thrush or vaginal yeast infections.","Use with caution in patients with liver disease; dose reduction may be needed.","May interfere with certain laboratory tests, including liver enzyme tests.","Do not use for viral infections such as the common cold.","Complete the full course as prescribed to prevent resistance."]

🤱 Lactation Safety

Metronidazole passes into breast milk and may affect the nursing infant. Some guidelines recommend avoiding breastfeeding during treatment and for 12-24 hours after a single dose, or for 48 hours after a multiple-dose regimen. Consult your doctor for personalised advice.

💊 Overdose Management

Overdose of this medicine may cause nausea, vomiting, abdominal pain, headache, dizziness, and in severe cases, seizures and peripheral neuropathy. There is no specific antidote. Treatment is supportive and symptomatic. If overdose is suspected, seek immediate medical attention. Activated charcoal may be considered if the patient presents early. Monitor vital signs and neurological status.

⏰ 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 take a double dose to make up for a missed one.

Additional Safety Advice

General Safety

Take this medicine exactly as prescribed by your doctor, with a full glass of water, and preferably with food to reduce stomach upset. Do not drink alcohol while taking this medicine and for at least 48 hours after finishing the course, because a severe reaction with flushing, nausea, vomiting, and rapid heartbeat can occur. Complete the full course even if you start feeling better after a few days, as stopping early can allow the infection to return and may lead to resistance. Inform your doctor if you have liver disease, kidney disease, a blood disorder, or a nervous system condition before starting this medicine. Tell your doctor about all other medicines you are taking, especially blood thinners such as warfarin, lithium, and anticonvulsants. Avoid driving or operating heavy machinery if you feel dizzy or confused. If you are pregnant, planning pregnancy, or breastfeeding, speak to your doctor before using this medicine. Keep this medicine out of the reach of children and store it in its original packaging.

👴 Special Considerations for Elderly

💡 For Patients Above 65

Elderly patients may be more sensitive to the neurological side effects of this medicine, such as dizziness, confusion, and peripheral neuropathy. Dose adjustment may be needed based on liver and kidney function. Regular monitoring is advised. Consult a doctor for personalised dosing.

🤰 Pregnancy Planning (TTC)

If you are planning to become pregnant, discuss with your doctor before taking this medicine. It should be used during pregnancy only when clearly needed. If you become pregnant while taking this medicine, inform your doctor immediately.

🏥 Post-Surgery Considerations

This medicine may be used before or after certain surgeries to prevent or treat anaerobic infections. Follow your surgeon's instructions carefully. Inform your surgical team if you are taking this medicine, as it may interact with other medications used during surgery.

🦷 Dental Procedures

Inform your dentist if you are taking this medicine before any dental procedure. It may interact with other medications used during dental work. There is no need to stop the medicine unless advised by your doctor.

💚 Lifestyle Tips for Better Results

🏃
Maintain good hand hygiene to prevent the spread of infections.
🥗
Stay well hydrated by drinking plenty of water throughout the day.
😴
Avoid alcohol completely during treatment and for 48 hours after.
💧
Eat a balanced diet to support your immune system.
🧘
Get adequate rest to help your body recover from the infection.
🌞
Practice safe sex to prevent sexually transmitted infections like trichomoniasis.
🚭
Complete the full course of antibiotics as prescribed.

🏋️ Exercise Considerations

This medicine may cause dizziness or confusion in some people. Avoid strenuous exercise or activities that require mental alertness if you feel unsteady. Light exercise such as walking is generally safe if you feel well. Consult your doctor before starting any new exercise routine while on this medicine.

🥗 Diet Recommendations

Drink plenty of water to stay hydrated.
Include probiotic-rich foods like yogurt to help maintain gut health.
Avoid spicy and fatty foods if you experience stomach upset.
Eat small, frequent meals if you have nausea.
Avoid alcohol completely during and after treatment.

💼 Impact on Daily Work & Life

This medicine may cause dizziness, confusion, or headaches in some people. Avoid driving or operating heavy machinery if you experience these symptoms. Most people can continue their normal daily activities, but take precautions if you feel unwell. Inform your employer if you need to take time off due to severe side effects.

🛑 When to Stop This Medicine

Do not stop taking this medicine without consulting your doctor. Complete the full course as prescribed, even if you feel better. If you experience serious side effects such as seizures, severe allergic reactions, or peripheral neuropathy, stop the medicine and seek immediate medical attention. Your doctor will advise you on whether to continue or switch to an alternative treatment.

📅 Long-Term Use Effects

Long-term use of this medicine may increase the risk of peripheral neuropathy, which can cause numbness, tingling, or pain in the hands and feet. It may also lead to blood disorders such as low white cell count. Prolonged therapy should be monitored with regular blood tests and liver function tests. If you experience any neurological symptoms, contact your doctor immediately. Long-term use should only be under strict medical supervision.

🌿 Non-Medicine Approaches

These can complement medicine but do not replace prescribed treatment.

Tinidazole

Another nitroimidazole antibiotic with a longer half-life, allowing less frequent dosing for some infections.

Evidence: Well-established
Ornidazole

A nitroimidazole antibiotic used for similar indications, with a longer half-life.

Evidence: Well-established
Probiotics

May help restore healthy gut and vaginal flora, especially after antibiotic treatment.

Evidence: Limited

💉 Vaccination Considerations

💉 If You're Getting Vaccinated

This medicine does not interact with vaccines. However, if you are due for a vaccination, inform your doctor that you are taking this medicine. There is no need to delay vaccination unless advised by your doctor.

📦 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

✅ DO

Keep out of reach of children

❌ DON'T

Do not use after expiry date

✈️ Traveling with This Medicine

When travelling, carry this medicine in its original packaging along with a copy of your prescription. Store it at room temperature, away from direct sunlight and moisture. If you are crossing time zones, adjust your dosing schedule to maintain even intervals, but consult your doctor for specific advice. Keep enough supply for your entire trip. Check customs regulations for carrying prescription medicines in your destination country. Avoid alcohol throughout your trip while taking this medicine.

💰 Cost Analysis & Savings

👥 Real Patient Stories

Educational, anonymized scenarios. Individual results may vary.

👤 A 32-year-old woman with bacterial vaginosis
She was prescribed this medicine 400 mg twice daily for 7 days. She experienced mild nausea and a metallic taste in her mouth during the first few days, but these settled after she started taking the tablet with breakfast and dinner. Her symptoms improved by day 4, and she completed the full course as advised. She was counselled to avoid alcohol completely during and after treatment.
💡 Lesson: Taking this medicine with food reduces stomach upset, and completing the full course is essential to prevent recurrence.
👤 A 45-year-old man with amoebic dysentery
He presented with bloody diarrhoea and abdominal pain. He was prescribed this medicine 800 mg three times daily for 10 days. His symptoms improved within 3 days, but he continued the full course. He was advised to drink plenty of fluids and avoid alcohol. He reported no significant side effects apart from dark urine, which was harmless.
💡 Lesson: This medicine is effective for amoebiasis when taken as prescribed, and staying hydrated helps recovery.
👤 A 28-year-old man with trichomoniasis
He was treated with a single 2 g dose of this medicine. His partner was also treated to prevent reinfection. He was warned about the alcohol interaction and advised to avoid alcohol for 48 hours. He experienced mild nausea after the dose but recovered quickly.
💡 Lesson: Treating sexual partners is crucial to prevent reinfection in trichomoniasis, and alcohol must be avoided.

💬 Questions Patients Often Ask

Q: How long does it take to work?

A: You may start feeling better within 24 to 48 hours, but it is important to complete the full course as prescribed to ensure the infection is fully cleared.

Q: Can I drink alcohol while taking this medicine?

A: No, you must strictly avoid alcohol during treatment and for at least 48 hours after the last dose, as it can cause a severe reaction with flushing, nausea, vomiting, and rapid heartbeat.

Q: What should I do if I miss a dose?

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.

Q: Is this medicine safe during pregnancy?

A: It should be used during pregnancy only when clearly needed, as advised by your doctor. Consult your doctor for personalised advice.

Q: Can I take this medicine with food?

A: Yes, taking it with food or milk is recommended to reduce stomach upset and nausea.

🤔 Common Patient Concerns

💭 These are the concerns patients most commonly raise

  • Can I take this medicine long-term?
  • Will it affect my kidney function?
  • Can I drive after taking this medicine?
  • Does it interact with my blood pressure medicine?
  • What if I miss a dose?
  • Can I drink alcohol while taking this?
  • Is it safe during pregnancy?
  • Can I take it with other antibiotics?

🔄 Substitutes for Tosgyl 400mg Tablet

View All

Alternative brands with exact same active ingredient:

Medical Note: Always consult your doctor before switching medications.

🛑 Myths vs. Facts

  • Myth: This medicine can cure any type of infection.
    Fact: This medicine is only effective against anaerobic bacteria and certain protozoa. It does not treat viral infections or aerobic bacterial infections.
  • Myth: You can stop taking this medicine as soon as you feel better.
    Fact: You must complete the full course as prescribed to ensure the infection is fully cleared and to prevent resistance.
  • Myth: It is safe to drink alcohol while taking this medicine.
    Fact: Alcohol must be strictly avoided because it can cause a severe disulfiram-like reaction.
  • Myth: This medicine is safe to take during pregnancy without any risk.
    Fact: It should be used during pregnancy only when clearly needed, as advised by a doctor.

🔄 Alternative Options

Generic Alternatives

  • Metronidazole 400 mg tablet

Brand Alternatives

  • Metrogyl 400
  • Flagyl 400
  • Metron 400
  • Aristogyl 400

📊 Comparison with Similar Medicines

[{"medicine":"Metronidazole 400 mg","class":"Nitroimidazole","half_life":"8 hours","typical_dose":"400 mg two to three times daily","alcohol_interaction":"Yes, severe"},{"medicine":"Tinidazole 500 mg","class":"Nitroimidazole","half_life":"12-14 hours","typical_dose":"2 g single dose or 500 mg twice daily","alcohol_interaction":"Yes, severe"},{"medicine":"Ornidazole 500 mg","class":"Nitroimidazole","half_life":"12-14 hours","typical_dose":"500 mg twice daily","alcohol_interaction":"Yes, severe"}]

😊 Was this information helpful?

Browse Medicines A-Z

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Back to Medicines Directory