What is this medicine?

CYANOCOBALAMIN (sye an oh koe BAL a min) is a man made form of vitamin B12. Vitamin B12 is used in the growth of healthy blood cells, nerve cells, and proteins in the body. It also helps with the metabolism of fats and carbohydrates. This medicine is used to treat people who can not absorb vitamin B12.

This medicine may be used for other purposes; ask your health care provider or pharmacist if you have questions.

COMMON BRAND NAME(S): B-12 Compliance Kit, B-12 Injection Kit, Cyomin, LA-12, Nutri-Twelve, Physicians EZ Use B-12, Primabalt

What should I tell my health care provider before I take this medicine?

They need to know if you have any of these conditions:

  • kidney disease

  • Leber's disease

  • megaloblastic anemia

  • an unusual or allergic reaction to cyanocobalamin, cobalt, other medicines, foods, dyes, or preservatives

  • pregnant or trying to get pregnant

  • breast-feeding

How should I use this medicine?

This medicine is injected into a muscle or deeply under the skin. It is usually given by a health care professional in a clinic or doctor's office. However, your doctor may teach you how to inject yourself. Follow all instructions.

Talk to your pediatrician regarding the use of this medicine in children. Special care may be needed.

Overdosage: If you think you have taken too much of this medicine contact a poison control center or emergency room at once.

NOTE: This medicine is only for you. Do not share this medicine with others.

What if I miss a dose?

If you are given your dose at a clinic or doctor's office, call to reschedule your appointment. If you give your own injections and you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.

What may interact with this medicine?

  • colchicine

  • heavy alcohol intake

This list may not describe all possible interactions. Give your health care provider a list of all the medicines, herbs, non-prescription drugs, or dietary supplements you use. Also tell them if you smoke, drink alcohol, or use illegal drugs. Some items may interact with your medicine.

What should I watch for while using this medicine?

Visit your doctor or health care professional regularly. You may need blood work done while you are taking this medicine.

You may need to follow a special diet. Talk to your doctor. Limit your alcohol intake and avoid smoking to get the best benefit.

What side effects may I notice from receiving this medicine?

Side effects that you should report to your doctor or health care professional as soon as possible:

  • allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue

  • blue tint to skin

  • chest tightness, pain

  • difficulty breathing, wheezing

  • dizziness

  • red, swollen painful area on the leg

Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):

  • diarrhea

  • headache

This list may not describe all possible side effects. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Where should I keep my medicine?

Keep out of the reach of children.

Store at room temperature between 15 and 30 degrees C (59 and 85 degrees F). Protect from light. Throw away any unused medicine after the expiration date.

NOTE: This sheet is a summary. It may not cover all possible information. If you have questions about this medicine, talk to your doctor, pharmacist, or health care provider.

Copyright ©2020 Elsevier Inc. All Rights Reserved. Terms of Use.

Cleveland Clinic is a non-profit academic medical center. Advertising on our site helps support our mission. We do not endorse non-Cleveland Clinic products or services. Policy