What is Cyanocobalamin: Uses, Warnings & Interactions

Updated May 14, 2025  •  Published Dec 30, 2020

Cyanocobalamin overview

BRAND NAMES:

  • Vitamin Deficiency Injectable System - B12, B-12 Kit, Physicians EZ Use B-12 Compliance, Vitamin Deficiency Injectable System - B12, Physicians EZ Use B-12 Compliance, Vitamin Deficiency Injectable System - B12

Generic Names:

  • Cyanocobalamin

Uses:

  • Treats vitamin B-12 deficiency.

Therapeutic Classes:

  • Diagnostic Agent, Vitamin B12 Absorption, Nutritive Agent

Forms:

  • Injectable

How it’s taken:

  • By injection

What is Cyanocobalamin used for?

Cyanocobalamin is the synthetic form of vitamin B12 used to treat low blood levels of the vitamin. Even though most people get enough vitamin B12 in the diet, some illnesses can cause deficiencies. Cyanocobalamin is a generic synthetic vitamin which is available under various trade names. Cyanocobalamin is also available in various over-the-counter brands.

What form(s) does Cyanocobalamin come in

  • Injectable

What are common Cyanocobalamin doses?

Common Cyanocobalamin prescriptions

  • Cyanocobalamin
    1 solution bottle

  • Cyanocobalamin
    50 tablets sublingual bottle

  • Cyanocobalamin
    1 solution box

  • Cyanocobalamin
    10ml of 1000mcg/ml vial

  • Cyanocobalamin
    1ml of 1000mcg/ml vial

  • Cyanocobalamin
    30ml of 1000mcg/ml vial

How to take Cyanocobalamin

  • Injection routeYour doctor will prescribe your exact dose and tell you how often it should be given. This medicine is given as a shot into one of your muscles.

  • Missed dose: Injection routeCall your doctor or pharmacist for instructions.

  • Missed dose: Injection routeCall your doctor or pharmacist for instructions.

  • Injection routeYour doctor will prescribe your exact dose and tell you how often it should be given. This medicine is given as a shot into one of your muscles.

What to do if you miss a dose of Cyanocobalamin

Cyanocobalamin contraindications

  • This medicine is not right for everyone. Do not use it if you had an allergic reaction to vitamin B-12.

Cyanocobalamin warnings

  • Keep all medicine out of the reach of children. Never share your medicine with anyone.

  • Tell your doctor if you are pregnant or breastfeeding, or if you have kidney disease.

Cyanocobalamin interactions

  • Do not use folic acid supplements unless your doctor says it is okay.

  • Keep all medicine out of the reach of children. Never share your medicine with anyone.

Cyanocobalamin side effects

Serious Side Effects

  • Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing