


Macrabin 1000mcg Injection
Cyanocobalamin (1000mcg)
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Macrabin 1000mcg Injection is a supplement of vitamin B12. It plays an important role in the formation of red blood cells and helps in absorption of iron in the body. In combination with other vitamins, it helps in strengthening the immune system, improves metabolism of the body, and is important for nervous system.
Written By Dr. Anuj Saini, MMST, MBBS,
Reviewed By Dr. Mekhala Chandra, MD, MBBS,
Last updated on 10 Sep 2026 | 01:06 AM (IST)
Written By Dr. Anuj Saini, MMST, MBBS,
Reviewed By Dr. Mekhala Chandra, MD, MBBS,
Last updated on 10 Sep 2026 | 01:06 AM (IST)
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General Information
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Product introduction
Macrabin 1000mcg Injection is generally administered by a doctor or a nurse. Do not self-administer this medicine at home. The dose and duration will depend on the severity of your condition.
Inform your doctor if you are allergic to any medicine or are taking medicines for Parkinson's disease. This medicine has minimal side effects. However, at the injection site, few people may experience redness, swelling, and pain which with time goes away.
Uses of Macrabin Injection
- Treatment of Vitamin B12 deficiency
Benefits of Macrabin Injection
Treatment of Vitamin B12 deficiency
Macrabin 1000mcg Injection is a supplement of vitamin B12. Vitamin B12 is essential in the formation of red blood cells and helps in the absorption of iron in the body. In combination with other vitamins, it helps in strengthening the immune system, improves the metabolism of the body, and is important for the nervous system.
Macrabin 1000mcg Injection is a supplement of vitamin B12. Vitamin B12 is essential in the formation of red blood cells and helps in the absorption of iron in the body. In combination with other vitamins, it helps in strengthening the immune system, improves the metabolism of the body, and is important for the nervous system.
Side effects of Macrabin Injection
Most side effects do not require any medical attention and disappear as your body adjusts to the medicine. Consult your doctor if they persist or if you’re worried about them
Common side effects of Macrabin
- Injection site reactions (pain, swelling, redness)
- Hypersensitivity
- Fever
- Chills
- Flushing (sense of warmth in the face, ears, neck and trunk)
- Dizziness
- General discomfort
- Nausea
- Acneiform eruptions
- Bullous eruptions
- Tremors
How to use Macrabin Injection
Your doctor or nurse will give you this medicine. Kindly do not self administer.
How Macrabin Injection works
Macrabin 1000mcg Injection is a form of vitamin B12 that provides essential nutrients.
Quick tips
- Macrabin 1000mcg Injection is used to treat or prevent low vitamin B12 in the body.
- You may experience slight pain and redness at the site of injection which is normal and usually resolves on its own.
- Inform your doctor if you are pregnant, breastfeeding or follow a vegetarian diet. He/She may adjust the dose of Macrabin 1000mcg Injection accordingly.
- Your doctor may advise getting your blood test done while taking Macrabin 1000mcg Injection to monitor the level of vitamin B12 in your body.
- Along with taking Macrabin 1000mcg Injection, take vitamin B12 rich foods in your diet like milk, cheese, meat, fish, eggs, and fortified cereals.
Safety advice

Alcohol
CONSULT YOUR DOCTOR
It is not known whether it is safe to consume alcohol with Macrabin 1000mcg Injection. Please consult your doctor.

Pregnancy
SAFE IF PRESCRIBED
Macrabin 1000mcg Injection is generally considered safe to use during pregnancy. Animal studies do not indicate harmful effects. However, there are limited human studies.

Breast feeding
SAFE IF PRESCRIBED
Available human data suggest that the drug does not pass into breast milk in clinically significant amounts and is unlikely to harm the infant.

Driving
SAFE
Macrabin 1000mcg Injection does not usually affect your ability to drive.

Kidney
CONSULT YOUR DOCTOR
There is limited data available on the use of Macrabin 1000mcg Injection in patients with kidney disease. Please consult your doctor.

Liver
SAFE IF PRESCRIBED
Macrabin 1000mcg Injection is probably safe to use in patients with liver disease. Limited data suggest dose adjustment may not be needed.

Frequently asked questions
Macrabin 1000mcg Injection is the synthetic form of Vitamin B12. It helps to prevent deficiency of B12 in the body. Vitamin B12 plays an important role in the formation of red blood cells and also helps in absorption of iron in the body. When taken in combination with other vitamins, it helps to strengthen the immune system and improve metabolism of the body. Along with that, it is also considered important for the nervous system.
Macrabin 1000mcg Injection is effective if used in the dose and duration advised by your doctor. Do not stop taking it even if you see improvement in your condition. If you stop using Macrabin 1000mcg Injection too early, the symptoms may return or worsen.
Macrabin 1000mcg Injection should be administered under the supervision of a trained healthcare professional or a doctor only and should not be self-administered. The dose will depend on the condition you are being treated for and will be decided by your doctor. Follow your doctor’s instructions carefully to get maximum benefit from Macrabin 1000mcg Injection.
Macrabin 1000mcg Injection is safe if used in the dose and duration advised by your doctor. Take it exactly as directed and do not skip any dose. Follow your doctor's instructions carefully and let your doctor know if any of the side effects bother you.
Fact Box
Chemical Class
Cobalamin derivative
Habit Forming
No
Therapeutic Class
VITAMINS MINERALS NUTRIENTS
Action Class
Vitamins
References
- Kaushansky K, Kipps TJ. Hematopoietic Agents: Growth Factors, Minerals, and Vitamins. In: Brunton LL, Chabner BA, Knollmann BC, editors. Goodman & Gilman’s: The Pharmacological Basis of Therapeutics. 12th ed. New York, New York: McGraw-Hill Medical; 2011. pp. 1088-92.
- Cyanocobalamin. Haninge, Sweden: RPH Pharmaceuticals AB; 1992 [revised 19 Jan. 2015]. [Accessed 05 Apr. 2019] (online) Available from:
- Central Drugs Standard Control Organisation (CDSCO). [Accessed 03 Apr. 2019] (online) Available from:

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Tata 1mg's sole intention is to ensure that its consumers get information that is expert-reviewed, accurate and trustworthy. However, the information contained herein should NOT be used as a substitute for the advice of a qualified physician. The information provided here is for informational purposes only. This may not cover everything about particular health conditions, lab tests, medicines, all possible side effects, drug interactions, warnings, alerts, etc. Please consult your doctor and discuss all your queries related to any disease or medicine. We intend to support, not replace, the doctor-patient relationship.
Marketer details
Name: Glaxo SmithKline Pharmaceuticals Ltd
Address: Dr. Annie Besant Road, Mumbai - 400 030
Address: Dr. Annie Besant Road, Mumbai - 400 030
Vendor Details
Country of origin: India
Lab tests offered by us
- CBC (Complete Blood Count)
- FBS (Fasting Blood Sugar)
- Thyroid Profile Total (T3, T4 & TSH)
- HbA1c (Glycosylated Hemoglobin)
- PPBS (Postprandial Blood Sugar)
- Lipid Profile
- Vitamin D (25-Hydroxy)
- Urine R/M (Urine Routine & Microscopy)
- Coronavirus Covid -19 test- RT PCR
- LFT (Liver Function Test)
- KFT (Kidney Function Test)
- TSH (Thyroid Stimulating Hormone) Ultrasensitive
- ESR (Erythrocyte Sedimentation Rate)
- Uric Acid, Serum
- Vitamin B12
- CRP (C-Reactive Protein), Quantitative
- Urine C/S (Urine Culture and Sensitivity)
- Serum Electrolytes
- Serum Calcium
- Serum Creatinine
- Diabetes Screening (HbA1C & Fasting Sugar)
- KFT with Electrolytes (Kidney Function Test with Electrolytes)
- Cholesterol - Total
- Hb (Hemoglobin)
- Complete Hemogram (CBC & ESR)
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