Question: How To Give Yourself A Vitamin B12 Shot?

Where do you inject B12?

The thigh is the most common injection site for intramuscular self-injections, but one may also inject the vitamin B12 shot at the shoulder and the upper buttocks. Experienced doctors commonly give a B12 shot in the deltoid muscle, but this is more difficult to do if you are just learning.

How is B12 injection given?

This medication is given by injection into a muscle or under the skin as directed by your doctor. Dosage is based on your medical condition and response to treatment. Injections may be given daily when you first start treatment.

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.

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What is the best form of injectable B12?

The bottom line



The body may absorb cyanocobalamin better, while methylcobalamin has a higher retention rate. Both can prevent B12 deficiency, but methylcobalamin should be combined with adenosylcobalamin for best results.

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.

Can you overdose on B12?

Since B12 is a water-soluble vitamin, it’s generally considered safe, even at high doses. No Tolerable Upper Intake Level (UL) has been established for B12, due to its low level of toxicity. UL refers to the maximum daily dose of a vitamin unlikely to cause adverse side effects in the general population.

How long does a vitamin B12 shot last?

How long will the effects of a B12 shot last? The effects of our shots vary between individuals. Most people feel the effects for about one week.

How often should you get B12 shots?

Once your B12 levels stabilize, you only need to administer every three to four days for 2-3 weeks. To maintain appropriate levels, it is suggested you take one B12 injection monthly and frequently get blood tests to determine future treatment.

How long does a B12 injection take to work?

When injections first are administered, a patient with severe symptoms may receive five to seven during the first week to restore the body’s reserves of this nutrient. A response usually is seen within 48 to 72 hours, with brisk production of new red blood cells.

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What size needle is used for intramuscular injection?

A 1” needle is sufficient in adults weighing 130–152 lbs (60–70 kg). A 1–1½” needle is recommended in women weighing 152–200 lbs (70–90 kg) and men weighing 152–260 lbs (70–118 kg). A 1½” needle is recommended in women weighing more than 200 lbs (90 kg) or men weighing more than 260 lbs (118 kg).

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.

Can an injection hit a nerve?

Injections that occur below the deltoid muscle can hit the radial nerve and injections that are too far to the side of the deltoid muscle can hit the axillary nerve. If a nerve is hit, the patient will feel an immediate burning pain, which can result in paralysis or neuropathy that does not always resolve.

What are the 4 types of B12?

While known commonly as ‘Vitamin B12‘ it does, in fact, exist in four very similar chemical forms, namely:

  • Methylcobalamin.
  • Adenosylcobalamin.
  • Cyanocobalamin.
  • Hydroxocobalamin.

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

Is oral B12 as effective as injections?

In both studies, high-dose oral B12 was as effective as intramuscular injection at achieving neurologic and hematologic response. Vitamin B12 is available over the counter in the form of tablets (100, 500, 1,000, or 5,000 mcg) and lozenges (50, 100, 250, or 500 mcg).

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