Metmax Injection: Complete Guide To Uses, Side Effects, And Safety
Clinical Reference Standards: CDSCO (Central Drugs Standard Control Organisation), Indian Pharmacopoeia (IP) & WHO | Last Updated: September 2026
When to Call Your Doctor IMMEDIATELY
- Difficulty breathing or shortness of breath
- Swelling of the face, lips, tongue, or throat
- Severe rash or hives
- Chest pain or palpitations
- Sudden severe headache
- Loss of consciousness
- Seizures
If experiencing severe symptoms, call emergency services immediately.
What is narinerv injection used for?
This medicine is an injectable combination of Methylcobalamin (750 mcg) and Thiamine (50 mg) used to treat nerve damage and vitamin deficiencies. It is given by a healthcare professional.
- Generic Name: Methylcobalamin (750mcg) + Thiamine(Vitamin B1) (50mg)
- Manufacturer: Ajuras Pharmaceutical Pvt Ltd
- Form: Allopathy
- Pregnancy Category: Consult doctor
- Prescription Required: Yes
🇮🇳 narinerv injection के बारे में (Hindi Summary)
उपयोग: यह दवा मेथिलकोबालामिन और थायमिन (विटामिन बी1) का संयोजन है, जो इंजेक्शन के रूप में दी जाती है। इसका उपयोग तंत्रिका क्षति, डायबिटिक न्यूरोपैथी, और विटामिन बी12 व बी1 की कमी के इलाज के लिए किया जाता है। यह दवा नसों को स्वस्थ रखने, झुनझुनी, सुन्नपन और जलन जैसे लक्षणों को कम करने में मदद करती है। यह केवल डॉक्टर या योग्य स्वास्थ्यकर्मी द्वारा ही दी जानी चाहिए।
साइड इफेक्ट्स: इस दवा के सामान्य दुष्प्रभावों में इंजेक्शन स्थल पर दर्द, लालिमा या सूजन, मतली, सिरदर्द और गर्मी का अनुभव शामिल हैं। गंभीर दुष्प्रभाव दुर्लभ हैं, लेकिन एलर्जी प्रतिक्रिया, सांस लेने में कठिनाई, चेहरे या गले में सूजन हो सकती है। ऐसे लक्षण दिखने पर तुरंत डॉक्टर से संपर्क करें।
सुरक्षा सलाह: यह दवा केवल योग्य स्वास्थ्यकर्मी द्वारा ही दी जानी चाहिए। स्वयं इंजेक्शन न लगाएं। इस दवा को लेने से पहले अपने डॉक्टर को अपनी सभी चिकित्सीय स्थितियों, दवाओं और एलर्जी के बारे में बताएं। गर्भावस्था या स्तनपान के दौरान डॉक्टर से सलाह लें। शराब का सेवन न करें। सभी फॉलो-अप अपॉइंटमेंट और जांच समय पर कराएं।
💊 narinerv injection Uses & Benefits
- [{"condition":"Peripheral neuropathy","description":"This medicine is used to treat peripheral neuropathy, a condition characterized by damage to the nerves outside the brain and spinal cord, leading to symptoms such as numbness, tingling, and pain in the hands and feet.","evidence":"Well-established"},{"condition":"Diabetic neuropathy","description":"It is commonly prescribed to manage diabetic neuropathy, a type of nerve damage caused by high blood sugar levels in people with diabetes.
- It helps alleviate symptoms and may improve nerve function.","evidence":"Well-established"},{"condition":"Vitamin B12 deficiency","description":"This medicine is used to treat Vitamin B12 deficiency, especially when oral supplementation is not effective or when a rapid correction is needed.
- It helps prevent complications such as anemia and neurological damage.","evidence":"Well-established"},{"condition":"Thiamine deficiency (Beriberi)","description":"It is indicated for the treatment of Thiamine deficiency, which can lead to beriberi, a disease affecting the cardiovascular and nervous systems.
- It is also used in Wernicke-Korsakoff syndrome.","evidence":"Well-established"},{"condition":"Megaloblastic anemia","description":"This medicine may be used as part of the treatment for megaloblastic anemia caused by Vitamin B12 deficiency, helping to restore normal red blood cell production.","evidence":"Well-established"}]
Off-label uses: [{"condition":"Chronic fatigue syndrome","description":"Sometimes prescribed off-label to help reduce fatigue and improve energy levels in individuals with chronic fatigue syndrome, though evidence is limited.","evidence":"Limited"},{"condition":"Carpal tunnel syndrome","description":"May be used off-label to relieve symptoms of carpal tunnel syndrome, such as pain and numbness in the hand and wrist, but its effectiveness is not well-established.","evidence":"Limited"}]
Primary treatment for: Peripheral neuropathy
Also treats: Diabetic neuropathy, Vitamin B12 deficiency, Thiamine deficiency, Megaloblastic anemia
📋 Drug Information
| Generic Name(s) | Methylcobalamin (750mcg) + Thiamine(Vitamin B1) (50mg) |
| Brand Name | narinerv injection |
| Manufacturer | Ajuras Pharmaceutical Pvt Ltd |
| Packaging / Form | Varies by brand (Allopathy) |
| Therapeutic Class | VITAMINS MINERALS NUTRIENTS |
| Action Class | |
| Route of Administration | Parenteral (intramuscular or intravenous injection) |
| Storage | Store in a cool, dry place, protected from light. Do not freeze. Keep out of reach of children. Store vials in the original carton until use. |
| Shelf Life | 24 months from the date of manufacture, unless otherwise specified on the packaging. |
| 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 supplying two essential B vitamins that are crucial for normal nerve function and metabolism. Methylcobalamin is the active coenzyme form of Vitamin B12. It acts as a cofactor for methionine synthase, an enzyme that converts homocysteine to methionine. This reaction is essential for the synthesis of myelin, the protective sheath around nerve fibers. By supporting myelin production, Methylcobalamin helps maintain the integrity of the nervous system and promotes nerve regeneration. Thiamine, or Vitamin B1, is converted in the body to thiamine pyrophosphate (TPP), which is a coenzyme for several key enzymes involved in carbohydrate metabolism, including pyruvate dehydrogenase, alpha-ketoglutarate dehydrogenase, and transketolase. These enzymes are critical for energy production in cells, especially in the brain and nervous system. Thiamine deficiency leads to impaired energy metabolism and can cause neurological and cardiovascular problems. Together, these vitamins support the health and function of the nervous system, improve nerve conduction, and help relieve symptoms of neuropathy.
Mechanism Steps
💡 How to Take narinerv injection
Strength: Each milliliter contains Methylcobalamin 750 micrograms and Thiamine (Vitamin B1) 50 milligrams.
Dosage Information
| Adult Dosage | The dosage of this medicine is individualized by a qualified clinician based on the indication, severity of deficiency, age, weight, renal and hepatic function. Typical adult doses range from 1 to 2 milliliters (containing 750 micrograms Methylcobalamin and 50 milligrams Thiamine) administered intramuscularly or intravenously once daily or as directed. For severe deficiencies, higher doses or more frequent administration may be prescribed initially, followed by maintenance doses. 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 or hepatic function and may require dose adjustment. The dose must be individualized by a qualified clinician based on renal and hepatic function. |
| Renal Impairment | Dose adjustment may be necessary in patients with renal impairment. Consult a qualified clinician for individualized dosing. |
| Hepatic Impairment | Dose adjustment may be necessary in patients with hepatic impairment. Consult a qualified clinician for individualized dosing. |
| Maximum Daily Dose | The maximum daily dose should not exceed the dose prescribed by your clinician. Typically, 1 to 2 milliliters per day is administered, but this may vary based on the indication. |
Dosage Timeline
🍽️ Food Timing Guide
⏰ What to Do If You Miss a Dose
⚠️ Side Effects of narinerv injection
✅ Common Side Effects
🚨 Serious Side Effects
⚠️ Rare Side Effects
Consult your doctor if you experience any unusual symptoms.
🔬 Drug Interactions
| Drug | Severity | Effect |
|---|---|---|
| Chloramphenicol | Major | |
| Omeprazole | Minor | |
| Alcohol | Moderate | |
| Metformin | Moderate | |
| Antacids | Minor |
🚨 Major Interactions
- Chloramphenicol
- Omeprazole and other proton pump inhibitors
⚡ Moderate Interactions
- Alcohol
- Metformin
🍷 Alcohol Interaction
Alcohol should be avoided while receiving this medicine. Chronic alcohol consumption can lead to Thiamine deficiency and worsen nerve damage. Alcohol may also reduce the effectiveness of the treatment and increase the risk of side effects.
🔎 Check Your Other Medicines
Educational tool. Always confirm with your doctor or pharmacist.
🛡️ Safety & Warnings
🚫 Contraindications
["Known hypersensitivity or allergy to Methylcobalamin, Thiamine, or any component of the formulation.","Leber's disease (hereditary optic neuropathy) - Methylcobalamin can worsen optic nerve damage.","Use in children under 12 years of age is not recommended unless prescribed by a specialist."]
⚠️ Warnings & Precautions
["This medicine should only be administered by a qualified healthcare professional.","Do not self-administer. Improper injection technique can cause serious complications.","Inform your doctor if you have kidney or liver disease.","Inform your doctor if you are pregnant, planning to become pregnant, or breastfeeding.","Avoid alcohol while receiving this medicine.","If you have Leber's disease, do not receive this medicine.","Report any signs of allergic reaction immediately.","Keep all follow-up appointments and laboratory tests."]
🤱 Lactation Safety
Methylcobalamin and Thiamine are excreted in breast milk. This medicine should be used during breastfeeding only if clearly needed and under medical supervision. Consult your doctor to weigh the benefits and risks.
💊 Overdose Management
Overdose with this medicine is unlikely due to its administration by a healthcare professional. In case of accidental overdose, seek immediate medical attention. Treatment is symptomatic and supportive. Monitor vital signs and provide appropriate care.
⏰ Missed Dose
If you miss a scheduled dose, contact your healthcare provider as soon as possible to reschedule. Do not attempt to self-administer a double dose to make up for a missed one.
Additional Safety Advice
This medicine must only be administered by a qualified healthcare professional. Do not attempt to self-inject. Before receiving this medicine, inform your doctor about all your medical conditions, especially if you have Leber's disease, kidney problems, or liver problems. Also, tell your doctor about all other medicines, supplements, and herbal products you are taking, as they may interact with this medicine. If you are pregnant, planning to become pregnant, or breastfeeding, consult your doctor before receiving this injection. Avoid consuming alcohol while undergoing treatment with this medicine, as alcohol can interfere with the absorption and effectiveness of Thiamine and may worsen nerve damage. Keep all follow-up appointments and laboratory tests as scheduled by your doctor. Do not stop treatment abruptly without consulting your doctor, even if you feel better. If you miss a scheduled dose, contact your healthcare provider to reschedule. Store this medicine as directed by your healthcare provider or pharmacist, and keep it out of the reach of children.
👴 Special Considerations for Elderly
💡 For Patients Above 65
Elderly patients may have reduced renal or hepatic function and may require dose adjustments. Monitor for side effects and efficacy closely.
🤰 Pregnancy Planning (TTC)
If you are planning to become pregnant, consult your doctor before receiving this medicine. Adequate levels of Vitamin B12 and Thiamine are important for fetal development, but the need for injectable therapy should be evaluated.
🏥 Post-Surgery Considerations
This medicine may be continued after surgery if clinically indicated. Inform your surgeon and anesthesiologist about all medications you are taking.
🦷 Dental Procedures
No specific precautions are required for dental procedures. However, inform your dentist about this medicine.
💚 Lifestyle Tips for Better Results
🏋️ Exercise Considerations
Moderate exercise is generally safe and beneficial. However, if you experience dizziness, numbness, or weakness, avoid activities that require balance or coordination until you consult your doctor.
🥗 Diet Recommendations
💼 Impact on Daily Work & Life
This medicine is unlikely to affect your ability to work or drive. However, if you experience dizziness or drowsiness after injection, avoid driving or operating heavy machinery until you feel alert.
🛑 When to Stop This Medicine
Do not stop this medicine without consulting your doctor. Your doctor will determine the appropriate duration of treatment based on your condition and response. Abrupt discontinuation may lead to recurrence of symptoms.
📅 Long-Term Use Effects
Long-term use of this medicine is generally safe when prescribed and monitored by a healthcare professional. Regular monitoring of Vitamin B12 and Thiamine levels, as well as renal and hepatic function, is recommended. Prolonged high-dose use of Thiamine is rarely associated with adverse effects. Methylcobalamin is considered safe for long-term use, except in patients with Leber's disease. Periodic reassessment of the need for continued therapy is advised.
🌿 Non-Medicine Approaches
These can complement medicine but do not replace prescribed treatment.
May be sufficient for mild deficiencies or maintenance therapy.
Evidence: Well-establishedIncreasing intake of foods rich in B vitamins can help prevent deficiencies.
Evidence: Well-established💉 Vaccination Considerations
💉 If You're Getting Vaccinated
There are no known interactions between this medicine and vaccines. However, inform your healthcare provider about all medications before receiving any vaccine.
📦 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
When traveling, carry this medicine in its original packaging with the prescription label intact. Keep a copy of your prescription with you. If you need to administer it during travel, ensure you have a letter from your doctor explaining the medical need. Store it in a cool, dry place, away from direct sunlight. For air travel, carry it in your hand luggage to avoid temperature extremes in checked baggage. Check customs regulations for carrying injectable medicines in your destination country.
💰 Cost Analysis & Savings
👥 Real Patient Stories
Educational, anonymized scenarios. Individual results may vary.
💬 Questions Patients Often Ask
A: Some patients may notice improvement in symptoms within a few weeks, but maximum benefit may take several months of regular treatment.
A: There may be mild pain or discomfort at the injection site, but it is usually temporary.
A: Consult your doctor. This medicine should be used during pregnancy only if clearly needed.
🤔 Common Patient Concerns
🔄 Substitutes for narinerv injection
View AllAlternative brands with exact same active ingredient:
Medical Note: Always consult your doctor before switching medications.
🛑 Myths vs. Facts
- Myth: This medicine can be self-administered at home.
Fact: This medicine must only be administered by a qualified healthcare professional. - Myth: This medicine is a painkiller.
Fact: This medicine is not a painkiller; it is a vitamin supplement that supports nerve health. - Myth: More is always better.
Fact: Taking more than the prescribed dose can be harmful and may cause side effects.
🔄 Alternative Options
Generic Alternatives
- Methylcobalamin 750 mcg + Thiamine 50 mg injection
Brand Alternatives
- Metmax injection