Vitamin B12 shot may be prescribed to prevent or treat the following: Pernicious anemia (a condition in which there are low red blood cell counts due to an abnormality in B12 absorption by the intestines) Megaloblastic anemia (a type of anemia in which there are very large red blood cells called megaloblasts) Cognitive disorders, such as dementia (a disorder characterized by problems with memory, problem-solving abilities, language, etc.) Disorders that affect B12 absorption, such as pancreatic diseases, intestinal infections, Crohns disease, and tropical sprue Cardiovascular disease risk (by lowering blood homocysteine levels, which is a compound associated with an increased risk of heart problems) Multiple sclerosis symptoms Bells palsy recovery B12 deficiencies related to: Weight loss Vegan or restrictive diets Surgery to remove the part of the stomach or the ileum (the last part of the small intestine) Energy and endurance What are signs of vitamin B12 deficiency
This provides approximately 4mcg/kg for a 160lb individual, falling within the effective clinical range
doi: 10.1001/jama.2019.2942 30 PratleyRAmodATetens HoffSKadowakiTLingvayINauckMet al
Intramuscular administration bypasses oral absorption, which is limited to approximately 12% of dose above 1,000 mcg due to intrinsic factor saturation in the ileum
B12 defic anemia NEC ICD-9-CM: 281.1 Approximate Flag - The approximate mapping means this ICD-10 code does not have an exact ICD-9 equivalent
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