Everything about Methylcobalamin: Uses, Side-effects, Precautions

Methylcobalamin is used in the treatment of vitamin B12 deficiency. Methylcobalamin is either taken orally or is injected into the body. It’s a supplement for vitamin B12, the nutrient that takes care of the nerves & brain. Vitamin B12 is also necessary for the production of RBC (red blood cells). In a few cases, Methylcobalamin is used for treating diabetes, pernicious anemia, and other health conditions. 

Things to take care of before taking Methylcobalamin:

You should make sure that you are following all the directions on the package & the label. Make sure you have discussed everything with your healthcare expert including allergies and all the medicines you are already taking. 

Here’s what you must & must not do:

  • Do not use methylcobalamin, if you have been ever allergic to cobalt or vitamin B12. 

  • Let your doctor know if you have ever had nerve damage.

  • Let your doctor know about your folic acid or iron deficiency.

  • Tell your doctor if your body has ever been potassium deficient.

  • Make sure your doctor has the knowledge of your pregnancy.

  • Make sure your doctor knows that you are breastfeeding.

  • Without advice from the doctor never give methylcobalamin to a child.

How to use Methylcobalamin?

Make sure that you are using it as directed by the doctor. Methylcobalamin is taken both orally and through injection. Oral doses are taken through the mouth while the Methylcobalamin is injected into the muscles. The injection is usually used 1 to 3 times per week and in the oral form, it is usually taken once every day. Get in touch with your healthcare expert to understand how to properly take this vitamin B 12 supplement on your own. 

  • It is not advised to swallow the lozenge tablet or the sublingual tablet whole.

  • Don’t chew the tablet and allow it to get dissolved in the mouth.

  • Place the tablet under the tongue and then swallow it.

  • Depending on you being a vegetarian or pregnant or a breastfeeding mom -- the dose might accordingly change.

  • Discuss any changes in your diet or medical conditions.

  • Store Methylcobalamin tablets at room temperature. Make sure it is placed away from heat or moisture.

  • In case you have missed a dose, take your dose as you realize it’s time. But if it’s almost time for your next dose avoid the last missed dose. Make sure not to take two doses at a time even when you have missed the last dose.

  • When you are taking Methylcobalamin, make sure that you are avoiding drinking alcohol in large amounts. Often taking large doses of alcohol may result in your body not absorbing methylcobalamin.

Side Effects of methylcobalamin:

You must call for emergency help if you are experiencing allergic reactions after taking methylcobalamin tablets. These allergic reactions may include difficulty in breathing, swollen lips, throat, tongue, or face. 

Some of the most common side-effects may include:

  • Vomiting

  • Nausea

  • Diarrhea

  • Loss of appetite.

  • Headache.


Methylcobalamin is a drug used for treating vitamin B12 deficiency. Always take these supplements only after consulting your doctor. Make sure that you have shared with medical experts everything about your health conditions and the medicines you are on. 

If you experience any kind of difficulty including loss of appetite, nausea, headache, or vomiting -- immediately consult your doctor. There are two forms of vitamin B12 treatment -- oral & injection. While oral Methylcobalamin is taken through the mouth, injection is injected into the muscles. 

If you are vitamin B12 deficient, it is always good to take supplements to maintain the ideal range. And especially if you are a vegetarian, you have very limited sources to take vitamin B12 naturally. But, before you start taking your vitamin supplements, make sure to consult your doctor and discuss everything about your health conditions & medications you are taking.

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