User:Mr. Ibrahem/Cyanocobalamin

Cyanocobalamin is a manufactured form of vitamin used to treat vitamin B12 deficiency. The deficiency may occur in pernicious anemia, following surgical removal of the stomach, with fish tapeworm, or due to bowel cancer. It is less preferred than hydroxocobalamin for treating vitamin B12 deficiency. It is used by mouth, by injection into a muscle, or as a nasal spray.

Cyanocobalamin is generally well tolerated. Minor side effects may include diarrhea and itchiness. Serious side effects may include anaphylaxis, low blood potassium, and heart failure. Use is not recommended in those who are allergic to cobalt or have Leber's disease. Vitamin is an essential nutrient meaning that it cannot be made by the body but is required for life.

Cyanocobalamin was first manufactured in the 1940s. It is available as a generic medication and over the counter. In the United Kingdom it costs the NHS about £2.90 per injection as of 2019. In the United States the wholesale cost of this amount was about US$0.77 in 2019. In 2017, it was the 170th most commonly prescribed medication in the United States, with more than three million prescriptions.