vib 12 1000mcg injection - Cyanocobalamin (1000mcg) medicine

Macrabin 1000mcg Injection: Complete Guide to Uses, Dosage, and Safety

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🏭 Cadila Pharmaceuticals Ltd 📦 Varies by brand 💊 Allopathy 📅 Updated: Sep 23, 2026
📋 Prescription Required 💊 Generic Available
Medically Reviewed
11 min read
Evidence: Well-established for vitamin B12 deficiency.
Reviewed by
SaathiMed Expert Panel | Sep 23, 2026

When to Call Your Doctor IMMEDIATELY

  • Difficulty breathing or swallowing
  • Swelling of the face, lips, tongue, or throat
  • Severe rash or hives
  • Chest pain or irregular heartbeat
  • Extreme dizziness or fainting
  • Seizures

If experiencing severe symptoms, call emergency services immediately.

What is vib 12 1000mcg injection used for?

This medicine is an injectable form of vitamin B12 used to treat vitamin B12 deficiency, pernicious anemia, and malabsorption syndromes. It is given by a healthcare professional, usually into a muscle.

  • Generic Name: Cyanocobalamin (1000mcg)
  • Manufacturer: Cadila Pharmaceuticals Ltd
  • Form: Allopathy
  • Pregnancy Category: Consult doctor
  • Prescription Required: Yes

🇮🇳 vib 12 1000mcg injection के बारे में (Hindi Summary)

उपयोग: यह दवा विटामिन बी12 की कमी, पर्निशियस एनीमिया और शरीर में बी12 के अवशोषण से जुड़ी समस्याओं के इलाज के लिए दी जाती है। यह इंजेक्शन के रूप में मांसपेशी में लगाई जाती है। यह लाल रक्त कोशिकाओं के निर्माण और तंत्रिका तंत्र के स्वास्थ्य के लिए आवश्यक है।

साइड इफेक्ट्स: इस दवा के सामान्य दुष्प्रभावों में इंजेक्शन वाली जगह पर दर्द, लालिमा या सूजन शामिल हो सकती है। कभी-कभी मतली, दस्त या कमजोरी महसूस हो सकती है। गंभीर एलर्जी प्रतिक्रियाएं दुर्लभ हैं, लेकिन यदि सांस लेने में कठिनाई, चेहरे या गले में सूजन हो, तो तुरंत डॉक्टर से संपर्क करें।

सुरक्षा सलाह: यह दवा केवल डॉक्टर या स्वास्थ्यकर्मी द्वारा ही दी जानी चाहिए। यदि आपको सायनोकोबालामिन या कोबाल्ट से एलर्जी है, तो डॉक्टर को बताएं। गर्भवती या स्तनपान कराने वाली महिलाएं डॉक्टर से सलाह लें। इलाज के दौरान शराब से बचें। नियमित जांच कराते रहें।

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

💊 vib 12 1000mcg injection Uses & Benefits

[{"condition":"Vitamin B12 deficiency","description":"This medicine is used to treat confirmed vitamin B12 deficiency, which can cause anemia, fatigue, and neurological symptoms.","evidence":"Well-established"},{"condition":"Pernicious anemia","description":"It is the standard treatment for pernicious anemia, an autoimmune condition that prevents the absorption of vitamin B12 from the gut.","evidence":"Well-established"},{"condition":"Malabsorption syndromes","description":"Used in conditions such as celiac disease, Crohn's disease, or after gastrointestinal surgery where oral B12 cannot be absorbed.","evidence":"Well-established"},{"condition":"Neurological symptoms of B12 deficiency","description":"Helps to treat and prevent nerve damage (neuropathy) caused by low vitamin B12 levels.","evidence":"Well-established"},{"condition":"Megaloblastic anemia","description":"Corrects the abnormal red blood cell formation seen in B12 deficiency.","evidence":"Well-established"}]

Off-label uses: [{"condition":"Chronic fatigue syndrome","description":"Sometimes used off-label to improve energy levels, though evidence is limited.","evidence":"Limited"},{"condition":"Cyanide poisoning","description":"High-dose hydroxocobalamin, a related form, is used as an antidote; cyanocobalamin may be used in some settings but is not standard.","evidence":"Limited"}]

Primary treatment for: Vitamin B12 deficiency

Also treats: Pernicious anemia, Malabsorption syndromes, Megaloblastic anemia, Neurological disorders due to B12 deficiency

📋 Drug Information

Generic Name(s)Cyanocobalamin (1000mcg)
Brand Namevib 12 1000mcg injection
ManufacturerCadila Pharmaceuticals Ltd
Packaging / FormVaries by brand (Allopathy)
Therapeutic ClassVITAMINS MINERALS NUTRIENTS
Action ClassVitamins
Route of AdministrationParenteral (intramuscular or subcutaneous injection)
StorageStore in a refrigerator at 2-8°C. Do not freeze. Protect from light. Keep out of reach of children.
Shelf LifeRefer to the expiry date on the packaging. Typically 24 months from the date of manufacture.
WHO GuidelineNot established from the available information.
ICMR GuidelineNot established from the available information.

👨‍⚕️ Doctor's Practical Tips

Evidence-based practical advice from experienced clinicians

1
Always administer this injection under the supervision of a healthcare professional.
2
Monitor for allergic reactions for at least 30 minutes after the injection.
3
Ensure the injection site is rotated to prevent discomfort.
4
Regular blood tests are important to check vitamin B12 levels and response to treatment.
5
Do not use if the solution is cloudy or has particles.
6
Inform your doctor about all other medications you are taking.

🔍 Is This Medicine Right for Your Symptom?

Educational reference. Always consult a doctor for diagnosis.

Fatigue and weakness
This medicine is used if the cause is vitamin B12 deficiency.
Likely Use
Tingling in hands and feet
May be due to B12 deficiency neuropathy.
Likely Use
Pale skin
Can be a sign of anemia due to B12 deficiency.
Likely Use
Fever
This medicine is not a treatment for fever.
Not Primary

🔬 How This Medicine Works (Pharmacology)

Pharmacokinetics

AbsorptionFollowing intramuscular injection, cyanocobalamin is rapidly and completely absorbed into the systemic circulation. The absorption is not dependent on intrinsic factor, which is why the injection is used in malabsorption conditions.
DistributionCyanocobalamin is distributed to the liver, bone marrow, and other tissues. It is stored primarily in the liver, with typical body stores sufficient for several months to years.
Protein BindingCyanocobalamin binds to transcobalamin II in the plasma for transport to tissues.
MetabolismCyanocobalamin is not metabolized in the traditional sense; it is converted to its active coenzyme forms in the body.
Half-LifeThe elimination half-life of cyanocobalamin is approximately 6 days, but this can vary depending on the route of administration and the patient's vitamin B12 status.
ExcretionExcess cyanocobalamin is excreted primarily in the urine, with some excretion in bile and feces.
BioavailabilityBioavailability is 100% when administered intramuscularly.
Onset of ActionImprovement in symptoms of anemia may begin within 24-48 hours, but neurological improvement may take weeks to months.
Peak Plasma TimePeak plasma levels are reached within 1-2 hours after intramuscular injection.
Duration of ActionThe effects of a single injection last for several days to weeks, depending on the dose and the patient's condition.

How It Works

This medicine provides a synthetic form of vitamin B12, which is converted in the body to its active coenzyme forms, methylcobalamin and adenosylcobalamin. These coenzymes are essential for two key biochemical reactions: the conversion of methylmalonyl-CoA to succinyl-CoA and the conversion of homocysteine to methionine. These reactions are critical for DNA synthesis, red blood cell maturation, and maintenance of the myelin sheath that surrounds nerves. By replenishing vitamin B12 stores, this medicine corrects the metabolic abnormalities that lead to megaloblastic anemia and neurological damage.

Mechanism Steps

1
Administration: This medicine is injected into a muscle, where it is absorbed into the bloodstream.
2
Conversion to active forms: In the body, cyanocobalamin is converted to methylcobalamin and adenosylcobalamin, the active coenzyme forms.
3
Enzymatic reactions: These coenzymes participate in the conversion of homocysteine to methionine and methylmalonyl-CoA to succinyl-CoA.
4
DNA synthesis and red blood cell production: These reactions are necessary for normal DNA synthesis and the production of healthy red blood cells.
5
Neurological maintenance: They also help maintain the myelin sheath, which protects nerve fibers.

💡 How to Take vib 12 1000mcg injection

Strength: Injection: 1000 mcg per milliliter

1This medicine is administered by a healthcare professional.
2It is given as an intramuscular injection, usually into the upper arm or buttock.
3The injection site will be cleaned before administration.
4You may feel a brief sting during the injection.
5After the injection, keep the area clean and dry.
6Follow your doctor's schedule for subsequent injections.

Dosage Information

Adult DosageThe dose of this medicine is individualized by a qualified clinician based on the indication, severity of deficiency, and patient's clinical condition. For pernicious anemia, a common regimen is 1000 mcg intramuscularly daily for one week, then weekly for four weeks, followed by monthly injections. For dietary deficiency, 1000 mcg intramuscularly every month may be sufficient. 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 require the same dose as adults, but dose adjustment may be needed based on renal function and overall health. Consult a doctor.
Renal ImpairmentNo specific dose adjustment is required for renal impairment, but use with caution and monitor as clinically indicated.
Hepatic ImpairmentNo specific dose adjustment is required for hepatic impairment, but use with caution and monitor as clinically indicated.
Maximum Daily DoseThe maximum daily dose is not established. Doses up to 1000 mcg per day are commonly used, but higher doses may be given under medical supervision.

Dosage Timeline

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

🍽️ Food Timing Guide

Alcohol
Avoid
Alcohol can reduce the effectiveness of vitamin B12.
Vitamin B12 rich foods
Encouraged
Helps maintain overall B12 levels, but not a substitute for injection in deficiency.

⏰ What to Do If You Miss a Dose

📌 If you miss a scheduled injection
→ Contact your healthcare provider as soon as possible to reschedule.
💡 Do not try to self-administer or double the dose.

⚠️ Side Effects of vib 12 1000mcg injection

✅ Common Side Effects

Injection site pain (Common (5-10%))
Apply a cold pack to the site. It usually resolves on its own.
Redness or swelling at injection site (Common (5-10%))
Keep the area clean and avoid rubbing. Consult a doctor if it worsens.
Nausea (Uncommon (1-5%))
Take small sips of water. If persistent, consult your doctor.
Diarrhea (Uncommon (1-5%))
Stay hydrated. Consult a doctor if it lasts more than 2 days.
Weakness (Uncommon (1-5%))
Rest and monitor. If it continues, speak to your doctor.

🚨 Serious Side Effects

Anaphylaxis (Rare (<0.1%))
Seek emergency medical help immediately if you experience difficulty breathing, swelling of the face, lips, or throat, or a severe rash.
Severe allergic reaction (Rare (<0.1%))
Call emergency services if you notice hives, itching, or swelling.
Irregular heartbeat (Rare (<0.1%))
Report to your doctor immediately if you feel palpitations or chest discomfort.
Chest pain (Rare (<0.1%))
Seek immediate medical attention.

⚠️ Rare Side Effects

Skin rash
Consult your doctor if a rash appears.
Itching
Report to your doctor if it persists.
Fever
Monitor and consult if it continues.

Consult your doctor if you experience any unusual symptoms.

🔬 Drug Interactions

Drug Severity Effect
Chloramphenicol Major
Metformin Moderate
Proton pump inhibitors Moderate
Colchicine Moderate
Aminoglycosides Minor
Anticonvulsants Minor
Alcohol Moderate

🚨 Major Interactions

  • Chloramphenicol
  • Proton pump inhibitors (e.g., omeprazole)

⚡ Moderate Interactions

  • Metformin
  • Colchicine

🍷 Alcohol Interaction

Alcohol can interfere with the absorption and metabolism of vitamin B12. It is advisable to avoid alcohol while receiving treatment for vitamin B12 deficiency.

🔎 Check Your Other Medicines

Educational tool. Always confirm with your doctor or pharmacist.

🛡️ Safety & Warnings

🚫 Contraindications

["Hypersensitivity to cyanocobalamin or cobalt","Leber's disease (hereditary optic nerve atrophy)"]

⚠️ Warnings & Precautions

["This medicine should only be administered by a healthcare professional.","Do not use if the solution is discolored or contains particles.","Use with caution in patients with kidney disease or liver disease.","Inform your doctor if you are pregnant or breastfeeding.","Avoid alcohol during treatment.","Do not self-administer; seek immediate medical help if allergic reactions occur."]

🤱 Lactation Safety

Cyanocobalamin is safe to use during breastfeeding as it is a natural component of breast milk. Consult your doctor for proper dosing.

💊 Overdose Management

Overdose with cyanocobalamin is unlikely to cause serious effects due to its low toxicity. However, in case of accidental overdose, seek medical attention and monitor for any unusual symptoms.

⏰ Missed Dose

If you miss a scheduled injection, contact your healthcare provider to reschedule. Do not attempt to double the dose.

Additional Safety Advice

General Safety

This medicine should only be given by a healthcare professional. Before receiving this injection, inform your doctor if you are allergic to cyanocobalamin, cobalt, or any other medications. Tell your doctor about all other medicines you are taking, especially antibiotics, proton pump inhibitors, and diabetes medications, as they may affect vitamin B12 levels. Do not receive this injection if you have Leber's disease, a hereditary eye condition, as it can worsen vision loss. If you are pregnant or breastfeeding, consult your doctor before receiving this medicine. Avoid alcohol while receiving treatment, as it can reduce the absorption of vitamin B12. Keep all follow-up appointments and blood tests to monitor your response to treatment.

👴 Special Considerations for Elderly

💡 For Patients Above 65

Elderly patients may be more prone to vitamin B12 deficiency due to reduced absorption. Regular monitoring and appropriate dosing are important. No specific dose adjustment is required unless kidney function is impaired.

🤰 Pregnancy Planning (TTC)

If you are planning to become pregnant, ensure your vitamin B12 levels are adequate. Deficiency can affect fetal development. Consult your doctor for proper management.

🏥 Post-Surgery Considerations

After surgery, especially gastrointestinal surgery, you may be at risk of vitamin B12 deficiency. Your doctor may prescribe this injection to prevent or treat deficiency.

🦷 Dental Procedures

No specific precautions are needed for dental procedures while on this medicine. However, inform your dentist about all medications you are taking.

💚 Lifestyle Tips for Better Results

🏃
Eat a balanced diet rich in vitamin B12, including meat, fish, eggs, and dairy.
🥗
Avoid excessive alcohol consumption.
😴
Keep up with regular medical appointments and blood tests.
💧
Inform your doctor if you experience any new symptoms.
🧘
Consider B12 supplements if you are vegetarian or vegan, as advised by your doctor.

🏋️ Exercise Considerations

No specific exercise restrictions are required while on this medicine. However, if you feel weak or dizzy, avoid strenuous activities until you feel better.

🥗 Diet Recommendations

Include vitamin B12-rich foods like fish, meat, poultry, eggs, and dairy.
For vegetarians, consider fortified cereals and plant-based milks.
Limit alcohol intake.

💼 Impact on Daily Work & Life

This medicine is unlikely to affect your ability to work or drive. However, if you experience dizziness or fatigue, avoid driving or operating heavy machinery until you feel alert.

🛑 When to Stop This Medicine

Do not stop this medicine without consulting your doctor. Stopping suddenly can lead to recurrence of deficiency symptoms. Your doctor will determine the appropriate duration of treatment based on your condition.

📅 Long-Term Use Effects

Long-term use of this medicine is generally safe and necessary for individuals with chronic B12 deficiency. Regular monitoring of B12 levels and blood counts is recommended to ensure adequate dosing and prevent complications. There is no known toxicity from long-term use.

🌿 Non-Medicine Approaches

These can complement medicine but do not replace prescribed treatment.

Oral vitamin B12 supplements

May be sufficient for mild deficiency or dietary insufficiency, but not for malabsorption.

Evidence: Well-established for mild deficiency
Dietary changes

Increasing intake of B12-rich foods can help prevent deficiency but is not a treatment for existing deficiency.

Evidence: Well-established for prevention

💉 Vaccination Considerations

💉 If You're Getting Vaccinated

There are no known interactions between this medicine and vaccines. However, consult your doctor before receiving any vaccine.

📦 Storage Guide

✅ DO

Store in a refrigerator at 2-8°C

❌ DON'T

Do not freeze

✅ DO

Keep in original carton to protect from light

❌ DON'T

Do not expose to direct sunlight

✅ DO

Keep out of reach of children

❌ DON'T

Do not use after expiry date

✈️ Traveling with This Medicine

When traveling with this medicine, carry it in its original packaging with the prescription label. Keep it in a cool, dry place, and if necessary, use a cool pack to maintain the temperature between 2-8°C. Carry a copy of your prescription to avoid issues at customs. Plan your injections around your travel schedule, and consult your doctor for advice on timing.

💰 Cost Analysis & Savings

👥 Real Patient Stories

Educational, anonymized scenarios. Individual results may vary.

👤 A 55-year-old man with pernicious anemia
He had been feeling extremely tired and had tingling in his hands. After starting Macrabin injections, his energy levels improved within a few weeks, and the tingling gradually decreased. He now receives monthly injections and feels much better.
💡 Lesson: Regular injections are crucial for managing pernicious anemia and preventing neurological complications.
👤 A 32-year-old woman with Crohn's disease
Due to her Crohn's disease, she couldn't absorb oral vitamin B12. Her doctor prescribed Macrabin injections. She noticed a significant improvement in her fatigue and mood after a few injections. She advises others to not skip their scheduled doses.
💡 Lesson: Injectable B12 is essential for those with malabsorption conditions.

💬 Questions Patients Often Ask

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

A: Improvement in symptoms like fatigue may be noticed within a few days to weeks, but neurological symptoms may take longer to improve.

Q: Can I take this injection if I am pregnant?

A: Vitamin B12 is safe during pregnancy when used as directed. However, consult your doctor for proper dosing.

Q: What are the storage requirements for this injection?

A: Store in a refrigerator at 2-8°C. Do not freeze. Protect from light.

🤔 Common Patient Concerns

💭 These are the concerns patients most commonly raise

  • Can I take this injection at home?
  • How long will I need these injections?
  • Are there any dietary changes needed?
  • Can I switch to oral B12?
  • What if I miss a dose?
  • Is it safe during pregnancy?

🔄 Substitutes for vib 12 1000mcg injection

View All

Alternative brands with exact same active ingredient:

Medical Note: Always consult your doctor before switching medications.

🛑 Myths vs. Facts

  • Myth: This injection is a general energy booster.
    Fact: It is only effective if you have a vitamin B12 deficiency. It is not a general tonic for fatigue.
  • Myth: You can stop the injections once you feel better.
    Fact: You may need ongoing maintenance injections to prevent deficiency from returning, especially if the cause is malabsorption.
  • Myth: Oral vitamin B12 is just as good as injections.
    Fact: Injections are necessary when oral absorption is impaired, such as in pernicious anemia.

🔄 Alternative Options

Generic Alternatives

  • Cyanocobalamin injection

Brand Alternatives

  • Macrabin 1000mcg injection

📊 Comparison with Similar Medicines

[{"medicine":"Cyanocobalamin","class":"Vitamin B12","route":"Intramuscular","duration":"Short-acting"},{"medicine":"Hydroxocobalamin","class":"Vitamin B12","route":"Intramuscular","duration":"Long-acting"},{"medicine":"Methylcobalamin","class":"Vitamin B12","route":"Intramuscular/Oral","duration":"Intermediate"}]

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