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Cyanocobalamin (Vitamin B12)

Cyanocobalamin (vitamin B12) is a custom pharmacy drug, a synthetic manufactured form of vitamin B12 that supports a healthy nervous system, boosts energy metabolism, and assists the body with the very important work of producing red blood cells as well as DNA and RNA. Insufficient amounts of vitamin B12 in the body could result in bouts with diarrhea, or fatigue, even possible nerve damage. Long-term lack of vitamin B12 could increase the risk of macular degeneration, heart disease, or other medical conditions. Cyanocobalamin is given as a supplement to a wide variety of patients who may be experiencing a low vitamin B12 level in their body.

How to Use Cyanocobalamin (vitamin B12)

Cyanocobalamin can be compounded into many forms of delivery tailored to a patient's specific needs and medical condition, age, or capability. Cyanocobalamin is often given orally in tablet form, or other form such as an injectable solution, nasal solution spray, nasal gel, or oral solution. Follow your doctor's detailed and specific directions for use and dosage. If taking orally, take with a full glass of water. Consult with your compounding pharmacist if you would like more information.

Possible Side Effects

Cyanocobalamin is generally tolerated well by most users; however if you experience any of the following potentially serious side effects, contact your doctor right away:

  • Weakness
  • Irregular Heartbeat
  • Muscle Cramps

The aforementioned side effects may be most likely to occur if you are anemic. Talk with your physician about all your options for treatment before taking any form of cyanocobalamin.

Other side effects are possible; watch for side effects and seek medical treatment if any side effects are concerning to you or worsening and/or staying.

Severe allergic reactions can occur occasionally so look for signs of severe allergic reaction and get medical attention immediately if you feel you are experiencing any of the following:

  • Trouble Breathing
  • Severe Dizziness
  • Rash
  • Itching and/or Swelling (especially notice the face, throat and tongue)


Cyanocobalamin may interact with other medications and drugs, supplements, or other so check with your doctor before beginning use.

Cyanocobalamin may be contraindicated for patients with the following medical conditions or history of procedure:

  • Operation to Remove Stomach
  • Leber's Hereditary Optic Atrophy
  • Atrophic Gastritis
  • Low Levels of Potassium in Blood

Cyanocobalamin may be contraindicated for patients with an allergy to:

  • Cobalamin and Derivatives
  • Cobalt

All patients are advised to have a full medical review with their primary care physician before starting a course of any drug.

  • "It is rare to find health professionals who are so willing to educate the patient on what they need to know."

    Clair C. | West Hollywood, CA