Readers ask: Vitamin B12 Injections How To Give?

How do you administer B12 injections?

It should be injected about two inches away from the navel itself. Take your thumb and index finger to pinch about 1 ½ inches of skin and inject the needle into the pinched skin. Slowly push the plunger to administer vitamin B12.

Is vitamin B12 injections subcutaneous or intramuscular?

Cyanocobalamin is usually administered by IM or deep subcutaneous injection. If the drug is administered subcutaneously, care should be taken to avoid injection into the dermis or upper subcutaneous tissue. Because the drug is excreted more rapidly after IV injection, the IV route should be avoided.

Where is the best place to give a B12 injection?

The easiest site when self-administering an IM injection is the middle third of the vastus lateralis muscle of the thigh. Other options include the deltoid muscle of the upper arm and the dorsogluteal site on the bottom.

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How long do B12 injections last?

If your vitamin B12 deficiency is not caused by a lack of vitamin B12 in your diet, you’ll usually need to have an injection of hydroxocobalamin every 2 to 3 months for the rest of your life.

How often can you have B12 injections?

The usual dose for pernicious anemia-associated vitamin B12 deficiency is 100 mcg given as an injection into the muscle or under the skin once daily for 6-7 days. Then the dose may be given every other day for 7 doses followed by every 3-4 days for around 3 weeks. Then, 100 mcg should be injected every month for life.

Do you need a prescription for B12 injections?

A B12 shot contains high levels of cyanocobalamin, which quickly elevates B12 levels in the body. Injections are water-soluble, which helps your body store and use the vitamin as it’s needed. Shots can be self-administered or given by a doctor. You need a prescription for injections.

What needle do you use for B12 injections?

Needle length is usually 1″–1½”, 22–25 gauge, but a longer or shorter needle may be needed depending on the patient’s weight. Note: An alternate site for IM injection in adults is the anterolateral thigh muscle.

What happens if a subcutaneous injection goes into the muscle?

However, subcutaneous injections can cause abscesses and granulomas. Muscle is probably spared the harmful effects of substances injected into it because of its abundant blood supply.

How do you make a B12 syringe?

How to draw up B12 (labeled as Methylcobalamin) Injections

  1. Wash your hands.
  2. Remove the plastic cap and wipe down the rubber stopper on the top of the bottle with an alcohol swab or cotton soaked with alcohol.
  3. Take the 3ml syringe out of the the package, remove tip cover avoiding contact with the tip of syringe.
  4. Pull back plunger and drawback air to the 1ml mark on the syringe.
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What are the side effects of B12 injections?

B12 shot side effects include, but are not limited to:

  • Swelling at the injection site.
  • Mild diarrhea.
  • Itching.
  • Swelling in the body.
  • Low potassium.
  • Headache.
  • Dizziness.
  • Vomiting.

What are the symptoms of B12 deficiency?

Symptoms of vitamin B12 deficiency

  • a pale yellow tinge to your skin.
  • a sore and red tongue (glossitis)
  • mouth ulcers.
  • pins and needles (paraesthesia)
  • changes in the way that you walk and move around.
  • disturbed vision.
  • irritability.
  • depression.

What medications should not be taken with B12?

Certain medications can decrease the absorption of vitamin B12, including: colchicine, metformin, extended-release potassium products, antibiotics (such as gentamicin, neomycin, tobramycin), anti-seizure medications (such as phenobarbital, phenytoin, primidone), medications to treat heartburn (such as H2 blockers

How long does B12 deficiency take to correct?

Recovery from vitamin B12 deficiency takes time and you may not experience any improvement during the first few months of treatment. Improvement may be gradual and may continue for up to six to 12 months.

Are B12 Injections Safe?

Safety and Side Effects



Vitamin B12 injections are generally considered to be very safe. They have no major side effects. However, in very rare cases, some people can experience side effects caused by allergic reactions or sensitivity ( 29, 30 ). If you experience any side effects, speak with your doctor.

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