Vitamin B-12 helps synthesize: white blood cells- responsible for fighting infection and make up part of the immune system red blood cells- carry oxygen throughout the body platelets- help to clot injury B12 also is responsible for nervous system functioning, bone health, and the function of brain cells
Frequently Asked Questions Is this compound stable at room temperature

Cyanocobalamin, or vitamin B12, is a B vitamin.It is found in a variety of foods such as fish, seafood, meats, and dairy products.Although vitamin B12 and the terms used interchangeably, vitamin B12 is also available as hydroxocobalamin, a less prescribed medication (see hydroxocobalamin monograph).Cyanocobalamin is available nasal, oral, and parenteral routes, and is equal in biological activity to hydroxocobalamin.Cyanocobalamin is used to treat pernicious anemia and vitamin B12 deficiency, as well as to determine vitamin B12 absorption in the Schilling test.Vitamin B12 is an essential vitamin found in foods like meat, eggs, and dairy products. Deficiency in healthy individuals is rare;the elderly, strict vegetarians (i.e. vegans) and patients with malabsorption problems have more problems becoming deficient.If vitamin B12 deficiency is not treated with a vitamin B12 supplement, it can cause anemia, intestinal problems, and irreversible nerve damage.Oral therapy is not always effective, as some people lack intrinsic factor, an endogenous substance produced by the stomach and necessary for the oral absorption of B12.Other patients may not be able to absorb oral vitamin B12 due to surgical removal or dysfunction of the intestines in the area where vitamin B12 absorption occurs.Therefore, parenteral or nasal therapy may be necessary;however, intranasal therapy should only be instituted for maintenance treatment after control of the condition has been obtained parenterally.Vitamin B12 is used to treat pernicious anemia and vitamin B12 deficiency, as well as to determine vitamin B12 absorption in the Schilling test.Cyanocobalamin was approved by the FDA in 1949. The intranasal measured gel solution (Nascobal) form was approved in November 1996 for vitamin B12 deficiency resulting from various conditions;In 2002, such conditions were expanded to include use in patients with vitamin B12 deficiency with HIV infection, AIDS, or Crohns disease.A B12 intranasal aerosol solution, also called Nascobal, with the same indications, was approved by the FDA in January 2005. Another intranasal aerosol, CaloMist , was approved in July 2007 for maintenance therapy after normalization with vitamin B12 IM.or Crohns disease.A B12 intranasal aerosol solution, also called Nascobal, with the same indications, was approved by the FDA in January 2005. Another intranasal aerosol, CaloMist , was approved in July 2007 for maintenance therapy after normalization with vitamin B12 IM.or Crohns disease.A B12 intranasal aerosol solution, also called Nascobal, with the same indications, was approved by the FDA in January 2005. Another intranasal aerosol, CaloMist , was approved in July 2007 for maintenance therapy after normalization with vitamin B12 IM

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Nanoparticles can be used to encapsulate the viral antigen into the nanoparticle core (e.g., mRNA lipid nanoparticles), or they can present the antigen as protein on the surface of the nanoparticles (e.g., virus-like particles, protein nanoparticles)
The FDA enforcement-discretion period that allowed mass compounding during the tirzepatide shortage ended on March 19, 2025 for 503B outsourcing facilities and February 18, 2025 for 503A pharmacies