The Web Health


Vitamin b12 injection

Generic name: cyanocobalamin (injection) [sye-an-oh-koe-bal-a-min]
Brand names: vitamin b12, vitamin b-12
Drug class: vitamins

What is Vitamin b12?

Vitamin b12, also known as synthetic vitamin b12, is an artificial form of the b12 vitamin.vitamin b12 plays a vital role in growth, cell division, blood formation, and the synthesis of proteins and tissues.vitamin b12 can be used to treat vitamin b12 deficiencies, pernicious anemia, and other conditions.


If you have leber’s disease or are allergic to cobalt, you should not take a vitamin b12 injection.

Before you take this drug

Vitamin b12 should not be used if you're allergic to cobalt or cyanocobalamin or have leber disease (an inherited type of vision loss). Leber's patients can develop optic nerve damage and possibly blindness if they take cyanocobalamin.

Tell your doctor about any of the following to ensure that this medication is safe for you:

  • Eye problems or leber’s disease in you or your family members;
  • Kidney or liver disease
  • Iron or folic acid deficiency
  • Any type of infection
  • If you receive any treatment or medication that can affect your bone marrow,

Inform your doctor if you are pregnant or nursing. You may need a different dose during pregnancy or breastfeeding.

Similar/related drugs

Cyanocobalamin, vitamin b12, hydroxocobalamin, dodex, neuroforte-r, and b-12 dots

How to take Vitamin b12 injection?

Follow the instructions on your prescription label and read all medication guides or instruction sheets. Read and follow all instructions on your prescription label.vitamin b12 is injected under or into the skin. You may be taught how to use the medication properly by a healthcare may need to adjust your dose if you are pregnant, breastfeeding, or eating a vegetarian-style diet. Inform your doctor of any changes to your diet or health condition.

Follow the directions on the label of your child's medicine when giving vitamin b12 to them. The dose depends on factors such as age, weight, diet, and may need to take vitamin b12 for the rest of your life if you have pernicious anemia. You should not stop taking the medication unless you are told to by your doctor. Untreated vitamin b12 deficiencies can cause anemia and irreversible nerve damage.folic acid is used to treat pernicious anemia and maintain the red blood cell count. Folic acid by itself will not prevent spinal cord damage or treat vitamin b12 deficiencies. All medications should be taken as prescribed.

Medical tests will be required frequently.vitamin b12 may affect certain medical tests. Inform any doctor that treats you about your use of a vitamin b12 this medication away from moisture, heat, and light at room temperature.

Only use a needle or syringe once, and then store them in an "as sharps" container that is puncture-proof. Be sure to follow local or state laws on how to properly dispose of the container. Keep the container away from pets and children.

Details on dosage

Usual adult dose for pernicious anaemia:

Initial dose: 100 mg intramuscularly or subcutaneously, once daily for 6-7 days.
If you see clinical improvement or a reticulocyte reaction from the above dosage:
after 2 to 3 weeks:
maintenance dose: 100–1000 mcg per month
duration of treatment: life
if necessary, administer concomitant folic acids.
Patients with normal intestinal absorption should receive a chronic treatment with oral preparation.

Adult dose for b12 nutritional deficiency:

Orally, 25–2000 mg daily

Adult dose for the schilling test:

The flushing dose is 1000 mcg intramuscularly.

The usual pediatric dose for b12 nutritional deficiency is:

Every day, 0.5 to 3 mg

What happens if i miss the dose?

If you miss a dosage, call your doctor to get instructions.

Refill your prescription before you run out.

What happens if i overdose?

Call 1-800-222-1222 for poison help or seek immediate medical attention.

What should be avoided?

You should not drink alcohol excessively while receiving vitamin b12 injections.

Side effects of vitamin b12

If you experience any of the following symptoms of an allergy to vitamin b12, seek immediate medical attention: itching; difficulty breathing; swelling on your face, lips, or tongue; or swelling of your throat, face, lips, and tongue.

If you experience:

  • Heart problem: rapid weight gain and a feeling of shortness of breath.
  • Fluid accumulation in or around the lungs; feeling of shortness of breath when lying down; wheezing or gasping for air; coughing up foamy mucus or cold; clammy or icy skin anxiety;
  • Low sodium level; cramps in the legs; constipation; increased thirst or urination; numbness, tingling, or muscle weakness.

Vitamin b12 can cause a variety of side effects.

  • Diarrhea;
  • Any swelling on your body is a sign of a serious problem.

There may be other side effects. For medical advice about side effects, call your physician. For reporting side effects to the fda at 1-800-fda-1088, contact their toll free number of 1-800-fda-1088.

Interaction with other drug

Other drugs, such as vitamins and herbal remedies, may also interact with cyanocobalamin. Inform your doctor of all the medicines you are taking and those that you stop or start using.